Autosave: 2024-11-04 16:36:34
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@ -3,7 +3,7 @@ tags:
|
||||||
- theorems
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- theorems
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||||||
---
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---
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||||||
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||||||
# The Property of Additive Identity
|
# Property of Additive Identity
|
||||||
|
|
||||||
**Let $a$ represent any member of $\mathbb{W}$ or $\mathbb{Z}$ then:**
|
**Let $a$ represent any member of $\mathbb{W}$ or $\mathbb{Z}$ then:**
|
||||||
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|
||||||
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@ -4,7 +4,7 @@ tags: []
|
||||||
created: Friday, June 28, 2024
|
created: Friday, June 28, 2024
|
||||||
---
|
---
|
||||||
|
|
||||||
# Concise mapping of object subfileds in JS
|
# Concise mapping of object subfields in JS
|
||||||
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|
||||||
## Scenario
|
## Scenario
|
||||||
|
|
||||||
|
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@ -56,8 +56,8 @@ arithmetic.
|
||||||
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|
||||||

|

|
||||||
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||||||
The main contenders were the Pascaline of #Pascal (which only did cumulative
|
The main contenders were the Pascaline of Pascal (which only did cumulative
|
||||||
addition) and the wheel or "stepped drum" calculator of #Leibniz that could do
|
addition) and the wheel or "stepped drum" calculator of Leibniz that could do
|
||||||
all operations (in theory).
|
all operations (in theory).
|
||||||
|
|
||||||
Subsequent designs were based on these artefacts. In practice, neither worked
|
Subsequent designs were based on these artefacts. In practice, neither worked
|
||||||
|
|
@ -73,7 +73,7 @@ with other mechanical calculators. In the US, Burroughs dominated the market.
|
||||||
|
|
||||||
## Babbage: mechanized, automated calculation
|
## Babbage: mechanized, automated calculation
|
||||||
|
|
||||||
> I wish to God these calculations had been executed by Steam (#Babbage)
|
> I wish to God these calculations had been executed by Steam (Babbage)
|
||||||
|
|
||||||
With Babbage's machines we see an approach to computation that can only be
|
With Babbage's machines we see an approach to computation that can only be
|
||||||
understood against the backdrop of the Industrial Revolution in which they were
|
understood against the backdrop of the Industrial Revolution in which they were
|
||||||
|
|
@ -97,23 +97,23 @@ automatically generated.
|
||||||
|
|
||||||
The DE's single purpose was to calculate and output mathematical tables such as
|
The DE's single purpose was to calculate and output mathematical tables such as
|
||||||
the results of polynomial equations. The idea was that you would input the
|
the results of polynomial equations. The idea was that you would input the
|
||||||
answer a bell would ring and the machine would _halt_. This influenced #Turing
|
answer a bell would ring and the machine would _halt_. This influenced Turing
|
||||||
later. It was non-programmable and designed for a specific set of calculations.
|
later. It was non-programmable and designed for a specific set of calculations.
|
||||||
|
|
||||||
### Analytical Engine
|
### Analytical Engine
|
||||||
|
|
||||||
Conceived as a general-purpose computing machine capable of perfoming a wide
|
Conceived as a general-purpose computing machine capable of performing a wide
|
||||||
range of calculations, programmable using punched cards similar to those used
|
range of calculations, programmable using punched cards similar to those used
|
||||||
with Jacquard looms.
|
with Jacquard looms.
|
||||||
|
|
||||||
It more resembled modern computers in that Babbage used concepts that would
|
It more resembled modern computers in that Babbage used concepts that would
|
||||||
later translate into the #vonNeumann architecture. There was a "mill" (CPU),
|
later translate into the [von Neumann architecture](CPU_architecture.md) There
|
||||||
"store" (memory) and input/output mechanisms. It also had a concept of looping
|
was a "mill" (CPU), "store" (memory) and input/output mechanisms. It also had a
|
||||||
and conditional branching.
|
concept of looping and conditional branching.
|
||||||
|
|
||||||
### Lovelace's insight
|
### Lovelace's insight
|
||||||
|
|
||||||
A central idea of Ada #Lovelace, expressed in her notes on the Analytical Engine
|
A central idea of Ada Lovelace, expressed in her notes on the Analytical Engine
|
||||||
is that **number can represent entities other than quantity**.
|
is that **number can represent entities other than quantity**.
|
||||||
|
|
||||||
If we assign meaning to number, results arrived at by operating on number
|
If we assign meaning to number, results arrived at by operating on number
|
||||||
|
|
@ -208,8 +208,8 @@ various mechanical parts were prone to wear and needed frequent replacement.
|
||||||
|
|
||||||
Designed by Howard Aiken and built by IBM (1937-1944). Also known as the
|
Designed by Howard Aiken and built by IBM (1937-1944). Also known as the
|
||||||
_Automatic Sequence Controlled Calculator_ (ASCC). A general-purpose
|
_Automatic Sequence Controlled Calculator_ (ASCC). A general-purpose
|
||||||
electro-mechanical computer it was most famously used at Los Alamos by
|
electro-mechanical computer it was most famously used at Los Alamos by von
|
||||||
#vonNeumann to calculate the blast yield of the atomic bomb.
|
Neumann to calculate the blast yield of the atomic bomb.
|
||||||
|
|
||||||

|

|
||||||
|
|
||||||
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@ -307,20 +307,20 @@ than binary and had punch card input and output. It was crudely programmable and
|
||||||
could be set up to work on different problems by rearranging the different
|
could be set up to work on different problems by rearranging the different
|
||||||
components using switches and plugboards. But this took roughly two days.
|
components using switches and plugboards. But this took roughly two days.
|
||||||
|
|
||||||
It's design was very influential because it was made public and not classified.
|
Its design was very influential because it was made public and not classified.
|
||||||
|
|
||||||
### EDVAC (1944-49) John Mauchly/J.P Eckert/ John von Neumann
|
### EDVAC (1944-49) John Mauchly/J.P Eckert/ John von Neumann
|
||||||
|
|
||||||
Built at the Moore School for the BRL as a successor to ENIAC by Mauchly and
|
Built at the Moore School for the BRL as a successor to ENIAC by Mauchly and
|
||||||
Eckert whilst ENIAC was still operational. It's architecture arose out of
|
Eckert whilst ENIAC was still operational. It's architecture arose out of
|
||||||
discussions between #vonNeumann and Mauchly and Eckert and was necessitated by
|
discussions between von Neumann and Mauchly and Eckert and was necessitated by
|
||||||
the need to calculate the behaviour of the fissile materials in the atomic bomb.
|
the need to calculate the behaviour of the fissile materials in the atomic bomb.
|
||||||
|
|
||||||
It resulted in the famous _First Draft of a Report on the EDVAC_ by #vonNeumann
|
It resulted in the famous _First Draft of a Report on the EDVAC_ by von Neumann
|
||||||
which is seen as the definitive statement of the modern **digital programmable
|
which is seen as the definitive statement of the modern **digital programmable
|
||||||
general-purpose computer**.
|
general-purpose computer**.
|
||||||
|
|
||||||
As a result of the paper, #vonNeumann effectively got the credit for the
|
As a result of the paper, von Neumann effectively got the credit for the
|
||||||
invention even though it synthesised ideas from the ENIAC and the contributions
|
invention even though it synthesised ideas from the ENIAC and the contributions
|
||||||
of others to the EDVAC.
|
of others to the EDVAC.
|
||||||
|
|
||||||
|
|
@ -421,7 +421,7 @@ variety of different electronic methods for memory:
|
||||||
|
|
||||||
#### The Automatic Computing Engine (ACE) (1946) Alan Turing
|
#### The Automatic Computing Engine (ACE) (1946) Alan Turing
|
||||||
|
|
||||||
- Technical design provided by Alan #Turing working at the Mathematics Division
|
- Technical design provided by Alan Turing working at the Mathematics Division
|
||||||
of the National Physical Laboratory. The product of Turing's theoretical work
|
of the National Physical Laboratory. The product of Turing's theoretical work
|
||||||
in "On Computable Numbers" where he proposes the concept of a
|
in "On Computable Numbers" where he proposes the concept of a
|
||||||
[Turing_machine](Turing_machines.md) and based on his experience with early
|
[Turing_machine](Turing_machines.md) and based on his experience with early
|
||||||
|
|
@ -700,7 +700,7 @@ chips, they advised the company to use a general purpose chip that could handle
|
||||||
general computing as well as the basic calculator functions. This generic chip -
|
general computing as well as the basic calculator functions. This generic chip -
|
||||||
the Intel 4004 - was the microprocessor combined with three other ICs
|
the Intel 4004 - was the microprocessor combined with three other ICs
|
||||||
(comprising 2.3k transistors) that comprised the fundamental building blocks of
|
(comprising 2.3k transistors) that comprised the fundamental building blocks of
|
||||||
the #vonNeumann architecture.
|
the von Neumann architecture.
|
||||||
|
|
||||||

|

|
||||||
|
|
||||||
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|
@ -0,0 +1,31 @@
|
||||||
|
---
|
||||||
|
tags: [literature, socio-political, world-wide-web]
|
||||||
|
created: Monday, November 04, 2024
|
||||||
|
---
|
||||||
|
|
||||||
|
# Weaving the Web (Berners-Lee, 1999)
|
||||||
|
|
||||||
|
Tim did not really conceive of the possibility of the centralising and
|
||||||
|
totalising effects of social media:
|
||||||
|
|
||||||
|
_The Web's universality leads to a thriving richness and diversity. If a company
|
||||||
|
claims to give access to the world of information, then presents a filtered
|
||||||
|
view, the Web loses its credibility._ (p.143)
|
||||||
|
|
||||||
|
_Happily, the Web is so huge that there's no way any one company can dominate
|
||||||
|
it. All the human effort people and organisations have put in all over the world
|
||||||
|
to create Web sites and home pages is astoundingly large, and most of the effort
|
||||||
|
has to do with what's in the Web, not the software used to browse it. The Web's
|
||||||
|
content, and thus value, will continue despite any one company's actions._
|
||||||
|
(p.144)
|
||||||
|
|
||||||
|
Apropos the "alt-right" etc:
|
||||||
|
|
||||||
|
_The analogy of a global brain is tempting, because Web and brain both involve
|
||||||
|
huge numbers of elements - neurons and Web pages - and a mixture of structure
|
||||||
|
and apparent randomness. However, a brain has an intelligence that emerges on
|
||||||
|
quite a different level from anything that a neuron could be aware
|
||||||
|
of...[W]riters have contemplated an 'emergent property' arising from the mass of
|
||||||
|
humanity and computers. But remember that such a phenomenon would have its own
|
||||||
|
agenda. We would not as individuals be ware of it, let alone control it, any
|
||||||
|
more than the neuron controls the brain._ p.222
|
||||||
|
|
@ -0,0 +1,52 @@
|
||||||
|
---
|
||||||
|
tags: [world-wide-web, computer-history, Microsoft]
|
||||||
|
created: Sunday, November 03, 2024
|
||||||
|
---
|
||||||
|
|
||||||
|
# c301a0b3-1d8_Mosaic_Netscape_and_Browser_Wars
|
||||||
|
|
||||||
|
The Mosaic browser was conceived and produced at the University of Illinois
|
||||||
|
during the very early growth of the Web, when TBL was still at CERN.
|
||||||
|
|
||||||
|
_Mosaic_:
|
||||||
|
|
||||||
|

|
||||||
|
|
||||||
|
It became the best of the early browsers (a group that included ViolaWWW and
|
||||||
|
Erwise) with the notable advantage of being able to embed graphics alongside
|
||||||
|
text (instead of inside a separate window). It also supported multiple
|
||||||
|
[application layer](Application_Layer_of_Internet_Protocol.md) protocols - FTP,
|
||||||
|
the Network News Transfer Protocol, Gopher - not just HTTP.
|
||||||
|
|
||||||
|
At this point there were nascent browsers for different operating systems and
|
||||||
|
which browser you used was mostly determined by your OS. Being the product of a
|
||||||
|
US university, Mosaic was originally written for Unix's X-Window system but was
|
||||||
|
ported to multiple OSs later, a key factor in its success and uptake.
|
||||||
|
|
||||||
|
Mosaic's creators formed their own company outside of the university: Netscape.
|
||||||
|
The browser they created, Netscape Navigator became the heir to Mosaic, released
|
||||||
|
in 1994.
|
||||||
|
|
||||||
|
_Netscape Navigator_:
|
||||||
|
|
||||||
|

|
||||||
|
|
||||||
|
It was made free of charge for non-commercial use which assured rapid uptake.
|
||||||
|
This was done to outrun Microsoft's Internet Explorer (released two months after
|
||||||
|
Netscape went public) which they intended to bundle with all new versions of
|
||||||
|
Windows 95. Netscape became the de facto standard browser during the early Web,
|
||||||
|
including on Windows. It took a few years for IE to overtake it.
|
||||||
|
|
||||||
|
_Internet Explorer 1 with licensing info_:
|
||||||
|
|
||||||
|

|
||||||
|
|
||||||
|
Netscape also birthed JavaScript, which was written rapidly specifically for the
|
||||||
|
browser. Prior to this, dynamic client-side functionality was provided by Java
|
||||||
|
'applets' which never really took off.
|
||||||
|
|
||||||
|
IE in fact shares a genealogy with Mosaic since Microsoft licensed a version of
|
||||||
|
the Mosaic code and used it to construct IE.
|
||||||
|
|
||||||
|
By the end of the 1990s, Netscape's usage had declined precipitously as IE
|
||||||
|
captured the market share.
|
||||||
|
|
@ -0,0 +1,19 @@
|
||||||
|
---
|
||||||
|
tags: [world-wide-web, computer-history]
|
||||||
|
created: Monday, November 04, 2024
|
||||||
|
---
|
||||||
|
|
||||||
|
# ecec56e6_precursors_to_search_engines
|
||||||
|
|
||||||
|
Before search engines as searchable indices of all content on the web, the
|
||||||
|
custom was for ISPs, browsers and websites (e.g. Yahoo!) to provide directories
|
||||||
|
of links to other sites. They functioned as sort of global web-portals.
|
||||||
|
|
||||||
|

|
||||||
|
|
||||||
|
_The Yahoo! homepage from 1999._
|
||||||
|
|
||||||
|

|
||||||
|
|
||||||
|
_The AltaVista homepage from 1999. It has a primitive search engine but also
|
||||||
|
directories of sites._
|
||||||
|
|
@ -0,0 +1,36 @@
|
||||||
|
---
|
||||||
|
tags: [world-wide-web, computer-history, internet, socio-political]
|
||||||
|
created: Monday, November 04, 2024
|
||||||
|
---
|
||||||
|
|
||||||
|
# f6564af9_AOL_and_early_internet_enclosure
|
||||||
|
|
||||||
|
We might view AOL, with it's millions of 'free trial' CD-ROMs, as the first
|
||||||
|
attempt by a corporate entity to try and enclose the Internet/Web. To take the
|
||||||
|
vase informational expanse and reduce it to a single, filtered and contained
|
||||||
|
space controlled by a single company.
|
||||||
|
|
||||||
|

|
||||||
|
|
||||||
|
_AOL interface from 1993_
|
||||||
|
|
||||||
|
This would later be achieved or approximated more effectively by Google (under
|
||||||
|
the guise of doing the opposite - people are "empowered" to access the
|
||||||
|
information they otherwise would not find, granted a key to the Internet etc.
|
||||||
|
When in fact, making everyone go through the same gate enables surveillance and
|
||||||
|
the monetisation of the use of a public resource) and then of course by the
|
||||||
|
social media companies.
|
||||||
|
|
||||||
|
AOL in fact started this even before there was a Web, pioneering the concept of
|
||||||
|
a web portal, with their [modem-based](cfbef1c4_web_precursors.md) private-BBS
|
||||||
|
business model. This provided access to a circumscribed subset of the Internet
|
||||||
|
at a time when accessing information was opaque and confusing to the average
|
||||||
|
non-technical user. The advent of the web first threatened and then basically
|
||||||
|
obviated this model, when access to information via browsers and HTTP servers
|
||||||
|
made the process easier and more democratized. Hence why AOL then tellingly
|
||||||
|
pivoted to the browser and search-engine market, the next available mechanism of
|
||||||
|
enclosure.
|
||||||
|
|
||||||
|

|
||||||
|
|
||||||
|
_AOL interface from 1999_
|
||||||
|
|
@ -13,27 +13,27 @@ computer science.
|
||||||
|
|
||||||

|

|
||||||
|
|
||||||
**Build ID:** 6ee38802-781e-4c65-8c64-56c9bccc4460
|
**Build ID:** 942a9988-f5a6-4ae9-be83-000113c8d4f2
|
||||||
|
|
||||||
**Published:** Mon 04 Nov 2024 14:26:41
|
**Published:** Mon 04 Nov 2024 16:36:33
|
||||||
|
|
||||||
### Recent edits
|
### Recent edits
|
||||||
|
|
||||||
|
- [[f6564af9_AOL_and_early_internet_enclosure]]
|
||||||
|
- [[ecec56e6_precursors_to_search_engines]]
|
||||||
|
- [[c301a0b3-1d8_Mosaic_Netscape_and_Browser_Wars]]
|
||||||
|
- [[The_History_of_Computing_Swade]]
|
||||||
|
- [[Weaving_the_Web_Berners_Lee]]
|
||||||
|
- [[Concise_subfield_mapping_JS]]
|
||||||
|
- [[Additive_identity]]
|
||||||
- [[MongoDB_connection]]
|
- [[MongoDB_connection]]
|
||||||
- [[Commutative_Property_of_Addition_and_Multiplication]]
|
- [[Commutative_Property_of_Addition_and_Multiplication]]
|
||||||
- [[Call_stack]]
|
- [[Call_stack]]
|
||||||
- [[Typing_built_in_React_hooks]]
|
- [[Typing_built_in_React_hooks]]
|
||||||
- [[Boot_process]]
|
- [[Boot_process]]
|
||||||
- [[Binary_encoding_of_text]]
|
|
||||||
- [[Testing_basic_prop_passing_in_React]]
|
|
||||||
- [[Associative_Property_of_Addition_and_Multiplication]]
|
|
||||||
- [[Classes_in_Python]]
|
|
||||||
- [[File_operations_in_Python]]
|
|
||||||
- [[Lists_in_Python]]
|
|
||||||
- [[Dictionaries_in_Python]]
|
|
||||||
|
|
||||||
|
|
||||||
### All notes (481)
|
### All notes (485)
|
||||||
|
|
||||||
- [[385af4b4_Baran_distributed_networks]]
|
- [[385af4b4_Baran_distributed_networks]]
|
||||||
- [[3f1b9fe5_motivation_Berners_Lee]]
|
- [[3f1b9fe5_motivation_Berners_Lee]]
|
||||||
|
|
@ -488,6 +488,7 @@ computer science.
|
||||||
- [[Virtual_private_cloud]]
|
- [[Virtual_private_cloud]]
|
||||||
- [[Voltage]]
|
- [[Voltage]]
|
||||||
- [[Voltage_sources]]
|
- [[Voltage_sources]]
|
||||||
|
- [[Weaving_the_Web_Berners_Lee]]
|
||||||
- [[What_are_disks]]
|
- [[What_are_disks]]
|
||||||
- [[What_is_memory]]
|
- [[What_is_memory]]
|
||||||
- [[Whole_numbers]]
|
- [[Whole_numbers]]
|
||||||
|
|
@ -502,10 +503,13 @@ computer science.
|
||||||
- [[Writing_to_files_in_Python]]
|
- [[Writing_to_files_in_Python]]
|
||||||
- [[Zero_property_of_multiplication]]
|
- [[Zero_property_of_multiplication]]
|
||||||
- [[Zip_function_in_Python]]
|
- [[Zip_function_in_Python]]
|
||||||
|
- [[c301a0b3-1d8_Mosaic_Netscape_and_Browser_Wars]]
|
||||||
- [[c8173d17_TIMPs]]
|
- [[c8173d17_TIMPs]]
|
||||||
- [[cfbef1c4_web_precursors]]
|
- [[cfbef1c4_web_precursors]]
|
||||||
- [[e470bf3d_IMPs_in_the_ARPANET]]
|
- [[e470bf3d_IMPs_in_the_ARPANET]]
|
||||||
|
- [[ecec56e6_precursors_to_search_engines]]
|
||||||
- [[f0f70a3c_ARPANET_motivations]]
|
- [[f0f70a3c_ARPANET_motivations]]
|
||||||
|
- [[f6564af9_AOL_and_early_internet_enclosure]]
|
||||||
- [[fs]]
|
- [[fs]]
|
||||||
- [[http_in_Node]]
|
- [[http_in_Node]]
|
||||||
- [[journald]]
|
- [[journald]]
|
||||||
|
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Before Width: | Height: | Size: 68 KiB After Width: | Height: | Size: 68 KiB |
|
Before Width: | Height: | Size: 289 KiB After Width: | Height: | Size: 289 KiB |
|
Before Width: | Height: | Size: 28 KiB After Width: | Height: | Size: 28 KiB |
|
Before Width: | Height: | Size: 6.9 MiB After Width: | Height: | Size: 6.9 MiB |
|
Before Width: | Height: | Size: 224 KiB After Width: | Height: | Size: 224 KiB |
|
Before Width: | Height: | Size: 6.4 KiB After Width: | Height: | Size: 6.4 KiB |
|
Before Width: | Height: | Size: 312 KiB After Width: | Height: | Size: 312 KiB |
|
After Width: | Height: | Size: 68 KiB |
|
After Width: | Height: | Size: 56 KiB |
|
Before Width: | Height: | Size: 31 KiB After Width: | Height: | Size: 31 KiB |
|
Before Width: | Height: | Size: 31 KiB After Width: | Height: | Size: 31 KiB |
|
Before Width: | Height: | Size: 46 KiB After Width: | Height: | Size: 46 KiB |
|
Before Width: | Height: | Size: 3.2 KiB After Width: | Height: | Size: 3.2 KiB |
|
Before Width: | Height: | Size: 3.9 KiB After Width: | Height: | Size: 3.9 KiB |
|
Before Width: | Height: | Size: 3.9 KiB After Width: | Height: | Size: 3.9 KiB |
|
Before Width: | Height: | Size: 20 KiB After Width: | Height: | Size: 20 KiB |
|
Before Width: | Height: | Size: 24 KiB After Width: | Height: | Size: 24 KiB |
|
Before Width: | Height: | Size: 86 KiB After Width: | Height: | Size: 86 KiB |
|
Before Width: | Height: | Size: 724 KiB After Width: | Height: | Size: 724 KiB |
|
Before Width: | Height: | Size: 198 KiB After Width: | Height: | Size: 198 KiB |
|
Before Width: | Height: | Size: 232 KiB After Width: | Height: | Size: 232 KiB |
|
Before Width: | Height: | Size: 21 KiB After Width: | Height: | Size: 21 KiB |
|
Before Width: | Height: | Size: 3.6 MiB After Width: | Height: | Size: 3.6 MiB |
|
Before Width: | Height: | Size: 204 KiB After Width: | Height: | Size: 204 KiB |
|
Before Width: | Height: | Size: 49 KiB After Width: | Height: | Size: 49 KiB |
|
Before Width: | Height: | Size: 20 KiB After Width: | Height: | Size: 20 KiB |
|
Before Width: | Height: | Size: 86 KiB After Width: | Height: | Size: 86 KiB |
|
After Width: | Height: | Size: 21 KiB |
|
Before Width: | Height: | Size: 165 KiB After Width: | Height: | Size: 165 KiB |
|
Before Width: | Height: | Size: 3.8 KiB After Width: | Height: | Size: 3.8 KiB |
|
Before Width: | Height: | Size: 1.6 KiB After Width: | Height: | Size: 1.6 KiB |
|
Before Width: | Height: | Size: 5.3 KiB After Width: | Height: | Size: 5.3 KiB |
|
After Width: | Height: | Size: 84 KiB |
|
After Width: | Height: | Size: 91 KiB |
|
Before Width: | Height: | Size: 90 KiB After Width: | Height: | Size: 90 KiB |
|
Before Width: | Height: | Size: 91 KiB After Width: | Height: | Size: 91 KiB |
|
Before Width: | Height: | Size: 133 KiB After Width: | Height: | Size: 133 KiB |
|
Before Width: | Height: | Size: 25 KiB After Width: | Height: | Size: 25 KiB |
|
Before Width: | Height: | Size: 61 KiB After Width: | Height: | Size: 61 KiB |
|
Before Width: | Height: | Size: 45 KiB After Width: | Height: | Size: 45 KiB |
|
Before Width: | Height: | Size: 4 KiB After Width: | Height: | Size: 4 KiB |
|
Before Width: | Height: | Size: 19 KiB After Width: | Height: | Size: 19 KiB |
|
Before Width: | Height: | Size: 23 KiB After Width: | Height: | Size: 23 KiB |
|
Before Width: | Height: | Size: 6.3 KiB After Width: | Height: | Size: 6.3 KiB |
|
Before Width: | Height: | Size: 2 KiB After Width: | Height: | Size: 2 KiB |
|
Before Width: | Height: | Size: 15 KiB After Width: | Height: | Size: 15 KiB |
|
Before Width: | Height: | Size: 15 KiB After Width: | Height: | Size: 15 KiB |
|
Before Width: | Height: | Size: 21 KiB After Width: | Height: | Size: 21 KiB |
|
Before Width: | Height: | Size: 45 KiB After Width: | Height: | Size: 45 KiB |
|
Before Width: | Height: | Size: 194 KiB After Width: | Height: | Size: 194 KiB |
|
Before Width: | Height: | Size: 148 KiB After Width: | Height: | Size: 148 KiB |
|
Before Width: | Height: | Size: 16 KiB After Width: | Height: | Size: 16 KiB |
|
Before Width: | Height: | Size: 46 KiB After Width: | Height: | Size: 46 KiB |
|
Before Width: | Height: | Size: 30 KiB After Width: | Height: | Size: 30 KiB |
|
Before Width: | Height: | Size: 9 KiB After Width: | Height: | Size: 9 KiB |
|
Before Width: | Height: | Size: 13 KiB After Width: | Height: | Size: 13 KiB |
|
Before Width: | Height: | Size: 9.6 KiB After Width: | Height: | Size: 9.6 KiB |
|
Before Width: | Height: | Size: 20 KiB After Width: | Height: | Size: 20 KiB |
|
Before Width: | Height: | Size: 70 KiB After Width: | Height: | Size: 70 KiB |
|
Before Width: | Height: | Size: 121 KiB After Width: | Height: | Size: 121 KiB |
|
Before Width: | Height: | Size: 5.9 KiB After Width: | Height: | Size: 5.9 KiB |
|
Before Width: | Height: | Size: 808 KiB After Width: | Height: | Size: 808 KiB |
|
Before Width: | Height: | Size: 32 KiB After Width: | Height: | Size: 32 KiB |
|
Before Width: | Height: | Size: 470 KiB After Width: | Height: | Size: 470 KiB |
|
Before Width: | Height: | Size: 12 KiB After Width: | Height: | Size: 12 KiB |
|
Before Width: | Height: | Size: 13 KiB After Width: | Height: | Size: 13 KiB |
|
Before Width: | Height: | Size: 10 KiB After Width: | Height: | Size: 10 KiB |
|
Before Width: | Height: | Size: 14 KiB After Width: | Height: | Size: 14 KiB |
|
Before Width: | Height: | Size: 13 KiB After Width: | Height: | Size: 13 KiB |
|
Before Width: | Height: | Size: 11 KiB After Width: | Height: | Size: 11 KiB |
|
Before Width: | Height: | Size: 99 KiB After Width: | Height: | Size: 99 KiB |
|
Before Width: | Height: | Size: 201 KiB After Width: | Height: | Size: 201 KiB |
|
Before Width: | Height: | Size: 175 KiB After Width: | Height: | Size: 175 KiB |
|
Before Width: | Height: | Size: 299 KiB After Width: | Height: | Size: 299 KiB |
|
Before Width: | Height: | Size: 59 KiB After Width: | Height: | Size: 59 KiB |
|
Before Width: | Height: | Size: 21 KiB After Width: | Height: | Size: 21 KiB |
|
Before Width: | Height: | Size: 213 KiB After Width: | Height: | Size: 213 KiB |
|
Before Width: | Height: | Size: 1.4 KiB After Width: | Height: | Size: 1.4 KiB |
|
Before Width: | Height: | Size: 1.2 KiB After Width: | Height: | Size: 1.2 KiB |
|
Before Width: | Height: | Size: 16 KiB After Width: | Height: | Size: 16 KiB |
|
Before Width: | Height: | Size: 14 KiB After Width: | Height: | Size: 14 KiB |
|
Before Width: | Height: | Size: 14 KiB After Width: | Height: | Size: 14 KiB |
|
Before Width: | Height: | Size: 9.6 KiB After Width: | Height: | Size: 9.6 KiB |
|
Before Width: | Height: | Size: 59 KiB After Width: | Height: | Size: 59 KiB |
|
Before Width: | Height: | Size: 155 KiB After Width: | Height: | Size: 155 KiB |
|
Before Width: | Height: | Size: 22 KiB After Width: | Height: | Size: 22 KiB |
|
Before Width: | Height: | Size: 23 KiB After Width: | Height: | Size: 23 KiB |
|
Before Width: | Height: | Size: 34 KiB After Width: | Height: | Size: 34 KiB |
|
Before Width: | Height: | Size: 99 KiB After Width: | Height: | Size: 99 KiB |
|
Before Width: | Height: | Size: 24 KiB After Width: | Height: | Size: 24 KiB |
|
Before Width: | Height: | Size: 26 KiB After Width: | Height: | Size: 26 KiB |
|
Before Width: | Height: | Size: 848 KiB After Width: | Height: | Size: 848 KiB |
|
Before Width: | Height: | Size: 194 KiB After Width: | Height: | Size: 194 KiB |
|
Before Width: | Height: | Size: 18 KiB After Width: | Height: | Size: 18 KiB |
|
Before Width: | Height: | Size: 11 KiB After Width: | Height: | Size: 11 KiB |
|
Before Width: | Height: | Size: 56 KiB After Width: | Height: | Size: 56 KiB |
|
Before Width: | Height: | Size: 35 KiB After Width: | Height: | Size: 35 KiB |
|
Before Width: | Height: | Size: 21 KiB After Width: | Height: | Size: 21 KiB |
|
Before Width: | Height: | Size: 142 KiB After Width: | Height: | Size: 142 KiB |
|
Before Width: | Height: | Size: 194 KiB After Width: | Height: | Size: 194 KiB |
|
Before Width: | Height: | Size: 130 KiB After Width: | Height: | Size: 130 KiB |
|
Before Width: | Height: | Size: 171 KiB After Width: | Height: | Size: 171 KiB |
|
Before Width: | Height: | Size: 20 KiB After Width: | Height: | Size: 20 KiB |
|
Before Width: | Height: | Size: 47 KiB After Width: | Height: | Size: 47 KiB |
|
Before Width: | Height: | Size: 20 KiB After Width: | Height: | Size: 20 KiB |
|
Before Width: | Height: | Size: 36 KiB After Width: | Height: | Size: 36 KiB |
|
Before Width: | Height: | Size: 24 KiB After Width: | Height: | Size: 24 KiB |
|
Before Width: | Height: | Size: 20 KiB After Width: | Height: | Size: 20 KiB |
|
Before Width: | Height: | Size: 31 KiB After Width: | Height: | Size: 31 KiB |
|
Before Width: | Height: | Size: 12 KiB After Width: | Height: | Size: 12 KiB |
|
Before Width: | Height: | Size: 9.7 KiB After Width: | Height: | Size: 9.7 KiB |
|
Before Width: | Height: | Size: 25 KiB After Width: | Height: | Size: 25 KiB |
|
Before Width: | Height: | Size: 18 KiB After Width: | Height: | Size: 18 KiB |
|
Before Width: | Height: | Size: 51 KiB After Width: | Height: | Size: 51 KiB |
|
Before Width: | Height: | Size: 79 KiB After Width: | Height: | Size: 79 KiB |
|
Before Width: | Height: | Size: 95 KiB After Width: | Height: | Size: 95 KiB |
|
Before Width: | Height: | Size: 29 KiB After Width: | Height: | Size: 29 KiB |
|
Before Width: | Height: | Size: 157 KiB After Width: | Height: | Size: 157 KiB |
|
Before Width: | Height: | Size: 226 KiB After Width: | Height: | Size: 226 KiB |
|
Before Width: | Height: | Size: 72 KiB After Width: | Height: | Size: 72 KiB |
|
Before Width: | Height: | Size: 153 KiB After Width: | Height: | Size: 153 KiB |
|
Before Width: | Height: | Size: 52 KiB After Width: | Height: | Size: 52 KiB |
|
Before Width: | Height: | Size: 145 KiB After Width: | Height: | Size: 145 KiB |
|
Before Width: | Height: | Size: 87 KiB After Width: | Height: | Size: 87 KiB |
|
Before Width: | Height: | Size: 74 KiB After Width: | Height: | Size: 74 KiB |
|
Before Width: | Height: | Size: 118 KiB After Width: | Height: | Size: 118 KiB |
|
Before Width: | Height: | Size: 414 KiB After Width: | Height: | Size: 414 KiB |
|
Before Width: | Height: | Size: 314 KiB After Width: | Height: | Size: 314 KiB |
|
Before Width: | Height: | Size: 59 KiB After Width: | Height: | Size: 59 KiB |
|
Before Width: | Height: | Size: 34 KiB After Width: | Height: | Size: 34 KiB |
|
Before Width: | Height: | Size: 38 KiB After Width: | Height: | Size: 38 KiB |
|
Before Width: | Height: | Size: 21 KiB After Width: | Height: | Size: 21 KiB |
|
Before Width: | Height: | Size: 174 KiB After Width: | Height: | Size: 174 KiB |
|
After Width: | Height: | Size: 36 KiB |
|
Before Width: | Height: | Size: 71 KiB After Width: | Height: | Size: 71 KiB |
|
Before Width: | Height: | Size: 31 KiB After Width: | Height: | Size: 31 KiB |
|
Before Width: | Height: | Size: 17 KiB After Width: | Height: | Size: 17 KiB |
|
Before Width: | Height: | Size: 16 KiB After Width: | Height: | Size: 16 KiB |
|
Before Width: | Height: | Size: 167 KiB After Width: | Height: | Size: 167 KiB |
|
Before Width: | Height: | Size: 27 KiB After Width: | Height: | Size: 27 KiB |
|
Before Width: | Height: | Size: 150 KiB After Width: | Height: | Size: 150 KiB |
|
Before Width: | Height: | Size: 69 KiB After Width: | Height: | Size: 69 KiB |
|
Before Width: | Height: | Size: 50 KiB After Width: | Height: | Size: 50 KiB |
|
Before Width: | Height: | Size: 38 KiB After Width: | Height: | Size: 38 KiB |
|
Before Width: | Height: | Size: 32 KiB After Width: | Height: | Size: 32 KiB |
|
Before Width: | Height: | Size: 93 KiB After Width: | Height: | Size: 93 KiB |
|
Before Width: | Height: | Size: 41 KiB After Width: | Height: | Size: 41 KiB |
|
Before Width: | Height: | Size: 9.2 KiB After Width: | Height: | Size: 9.2 KiB |
|
Before Width: | Height: | Size: 30 KiB After Width: | Height: | Size: 30 KiB |
|
Before Width: | Height: | Size: 18 KiB After Width: | Height: | Size: 18 KiB |
|
Before Width: | Height: | Size: 73 KiB After Width: | Height: | Size: 73 KiB |
|
Before Width: | Height: | Size: 65 KiB After Width: | Height: | Size: 65 KiB |
|
Before Width: | Height: | Size: 47 KiB After Width: | Height: | Size: 47 KiB |
|
Before Width: | Height: | Size: 24 KiB After Width: | Height: | Size: 24 KiB |
|
Before Width: | Height: | Size: 140 KiB After Width: | Height: | Size: 140 KiB |
|
Before Width: | Height: | Size: 75 KiB After Width: | Height: | Size: 75 KiB |
|
Before Width: | Height: | Size: 123 KiB After Width: | Height: | Size: 123 KiB |
|
Before Width: | Height: | Size: 38 KiB After Width: | Height: | Size: 38 KiB |
|
Before Width: | Height: | Size: 15 KiB After Width: | Height: | Size: 15 KiB |
|
Before Width: | Height: | Size: 29 KiB After Width: | Height: | Size: 29 KiB |
|
Before Width: | Height: | Size: 190 KiB After Width: | Height: | Size: 190 KiB |
|
Before Width: | Height: | Size: 374 KiB After Width: | Height: | Size: 374 KiB |
|
Before Width: | Height: | Size: 9 KiB After Width: | Height: | Size: 9 KiB |
|
Before Width: | Height: | Size: 1.2 MiB After Width: | Height: | Size: 1.2 MiB |
|
Before Width: | Height: | Size: 99 KiB After Width: | Height: | Size: 99 KiB |
|
Before Width: | Height: | Size: 76 KiB After Width: | Height: | Size: 76 KiB |
|
Before Width: | Height: | Size: 14 KiB After Width: | Height: | Size: 14 KiB |
|
Before Width: | Height: | Size: 96 KiB After Width: | Height: | Size: 96 KiB |
|
Before Width: | Height: | Size: 11 KiB After Width: | Height: | Size: 11 KiB |
|
After Width: | Height: | Size: 448 KiB |
|
Before Width: | Height: | Size: 122 KiB After Width: | Height: | Size: 122 KiB |
|
Before Width: | Height: | Size: 33 KiB After Width: | Height: | Size: 33 KiB |
|
Before Width: | Height: | Size: 668 KiB After Width: | Height: | Size: 668 KiB |
|
Before Width: | Height: | Size: 1.3 MiB After Width: | Height: | Size: 1.3 MiB |
|
Before Width: | Height: | Size: 1.9 KiB After Width: | Height: | Size: 1.9 KiB |
|
Before Width: | Height: | Size: 70 KiB After Width: | Height: | Size: 70 KiB |
|
Before Width: | Height: | Size: 45 KiB After Width: | Height: | Size: 45 KiB |
|
Before Width: | Height: | Size: 43 KiB After Width: | Height: | Size: 43 KiB |
|
Before Width: | Height: | Size: 19 KiB After Width: | Height: | Size: 19 KiB |
|
Before Width: | Height: | Size: 20 KiB After Width: | Height: | Size: 20 KiB |
|
Before Width: | Height: | Size: 20 KiB After Width: | Height: | Size: 20 KiB |
|
Before Width: | Height: | Size: 13 KiB After Width: | Height: | Size: 13 KiB |
|
Before Width: | Height: | Size: 12 KiB After Width: | Height: | Size: 12 KiB |
|
Before Width: | Height: | Size: 9.7 KiB After Width: | Height: | Size: 9.7 KiB |
|
Before Width: | Height: | Size: 11 KiB After Width: | Height: | Size: 11 KiB |
|
Before Width: | Height: | Size: 52 KiB After Width: | Height: | Size: 52 KiB |
|
Before Width: | Height: | Size: 15 KiB After Width: | Height: | Size: 15 KiB |
|
Before Width: | Height: | Size: 2.5 KiB After Width: | Height: | Size: 2.5 KiB |
|
Before Width: | Height: | Size: 8.9 KiB After Width: | Height: | Size: 8.9 KiB |
|
Before Width: | Height: | Size: 11 KiB After Width: | Height: | Size: 11 KiB |
|
Before Width: | Height: | Size: 17 KiB After Width: | Height: | Size: 17 KiB |
|
Before Width: | Height: | Size: 13 KiB After Width: | Height: | Size: 13 KiB |
|
Before Width: | Height: | Size: 2.2 KiB After Width: | Height: | Size: 2.2 KiB |
|
Before Width: | Height: | Size: 21 KiB After Width: | Height: | Size: 21 KiB |
|
Before Width: | Height: | Size: 36 KiB After Width: | Height: | Size: 36 KiB |
|
Before Width: | Height: | Size: 108 KiB After Width: | Height: | Size: 108 KiB |
|
Before Width: | Height: | Size: 41 KiB After Width: | Height: | Size: 41 KiB |
|
Before Width: | Height: | Size: 108 KiB After Width: | Height: | Size: 108 KiB |
|
Before Width: | Height: | Size: 50 KiB After Width: | Height: | Size: 50 KiB |
|
Before Width: | Height: | Size: 90 KiB After Width: | Height: | Size: 90 KiB |
|
Before Width: | Height: | Size: 144 KiB After Width: | Height: | Size: 144 KiB |
|
Before Width: | Height: | Size: 37 KiB After Width: | Height: | Size: 37 KiB |
|
Before Width: | Height: | Size: 9.9 KiB After Width: | Height: | Size: 9.9 KiB |
|
Before Width: | Height: | Size: 30 KiB After Width: | Height: | Size: 30 KiB |
|
Before Width: | Height: | Size: 30 KiB After Width: | Height: | Size: 30 KiB |
|
Before Width: | Height: | Size: 21 KiB After Width: | Height: | Size: 21 KiB |
|
Before Width: | Height: | Size: 249 KiB After Width: | Height: | Size: 249 KiB |
|
Before Width: | Height: | Size: 89 KiB After Width: | Height: | Size: 89 KiB |
|
Before Width: | Height: | Size: 3.2 KiB After Width: | Height: | Size: 3.2 KiB |
|
Before Width: | Height: | Size: 35 KiB After Width: | Height: | Size: 35 KiB |
|
Before Width: | Height: | Size: 6.5 KiB After Width: | Height: | Size: 6.5 KiB |
|
Before Width: | Height: | Size: 18 KiB After Width: | Height: | Size: 18 KiB |
|
Before Width: | Height: | Size: 10 KiB After Width: | Height: | Size: 10 KiB |
|
Before Width: | Height: | Size: 29 KiB After Width: | Height: | Size: 29 KiB |
|
Before Width: | Height: | Size: 12 KiB After Width: | Height: | Size: 12 KiB |
|
Before Width: | Height: | Size: 66 KiB After Width: | Height: | Size: 66 KiB |
|
Before Width: | Height: | Size: 16 KiB After Width: | Height: | Size: 16 KiB |
|
Before Width: | Height: | Size: 194 KiB After Width: | Height: | Size: 194 KiB |
|
Before Width: | Height: | Size: 81 KiB After Width: | Height: | Size: 81 KiB |
|
Before Width: | Height: | Size: 12 KiB After Width: | Height: | Size: 12 KiB |
|
Before Width: | Height: | Size: 21 KiB After Width: | Height: | Size: 21 KiB |
|
Before Width: | Height: | Size: 10 KiB After Width: | Height: | Size: 10 KiB |
|
Before Width: | Height: | Size: 5.8 KiB After Width: | Height: | Size: 5.8 KiB |
|
Before Width: | Height: | Size: 22 KiB After Width: | Height: | Size: 22 KiB |
|
Before Width: | Height: | Size: 22 KiB After Width: | Height: | Size: 22 KiB |
|
Before Width: | Height: | Size: 23 KiB After Width: | Height: | Size: 23 KiB |
|
Before Width: | Height: | Size: 22 KiB After Width: | Height: | Size: 22 KiB |
|
Before Width: | Height: | Size: 20 KiB After Width: | Height: | Size: 20 KiB |
|
Before Width: | Height: | Size: 5 KiB After Width: | Height: | Size: 5 KiB |
|
Before Width: | Height: | Size: 16 KiB After Width: | Height: | Size: 16 KiB |
|
Before Width: | Height: | Size: 1.6 KiB After Width: | Height: | Size: 1.6 KiB |
|
Before Width: | Height: | Size: 1.7 KiB After Width: | Height: | Size: 1.7 KiB |
|
Before Width: | Height: | Size: 139 KiB After Width: | Height: | Size: 139 KiB |
|
Before Width: | Height: | Size: 160 KiB After Width: | Height: | Size: 160 KiB |
|
Before Width: | Height: | Size: 121 KiB After Width: | Height: | Size: 121 KiB |
|
Before Width: | Height: | Size: 20 KiB After Width: | Height: | Size: 20 KiB |
|
Before Width: | Height: | Size: 22 KiB After Width: | Height: | Size: 22 KiB |
|
Before Width: | Height: | Size: 28 KiB After Width: | Height: | Size: 28 KiB |
|
Before Width: | Height: | Size: 34 KiB After Width: | Height: | Size: 34 KiB |
|
Before Width: | Height: | Size: 28 KiB After Width: | Height: | Size: 28 KiB |
|
Before Width: | Height: | Size: 3.7 KiB After Width: | Height: | Size: 3.7 KiB |
|
Before Width: | Height: | Size: 4.2 KiB After Width: | Height: | Size: 4.2 KiB |
|
Before Width: | Height: | Size: 5.8 KiB After Width: | Height: | Size: 5.8 KiB |
|
Before Width: | Height: | Size: 118 KiB After Width: | Height: | Size: 118 KiB |
|
Before Width: | Height: | Size: 28 KiB After Width: | Height: | Size: 28 KiB |
|
Before Width: | Height: | Size: 23 KiB After Width: | Height: | Size: 23 KiB |
|
Before Width: | Height: | Size: 81 KiB After Width: | Height: | Size: 81 KiB |
|
Before Width: | Height: | Size: 30 KiB After Width: | Height: | Size: 30 KiB |
|
Before Width: | Height: | Size: 7.4 KiB After Width: | Height: | Size: 7.4 KiB |
|
Before Width: | Height: | Size: 7.3 KiB After Width: | Height: | Size: 7.3 KiB |
|
Before Width: | Height: | Size: 42 KiB After Width: | Height: | Size: 42 KiB |
|
Before Width: | Height: | Size: 58 KiB After Width: | Height: | Size: 58 KiB |
|
Before Width: | Height: | Size: 146 KiB After Width: | Height: | Size: 146 KiB |
|
Before Width: | Height: | Size: 85 KiB After Width: | Height: | Size: 85 KiB |
|
Before Width: | Height: | Size: 10 KiB After Width: | Height: | Size: 10 KiB |
|
Before Width: | Height: | Size: 30 KiB After Width: | Height: | Size: 30 KiB |
|
Before Width: | Height: | Size: 4.3 KiB After Width: | Height: | Size: 4.3 KiB |
|
Before Width: | Height: | Size: 130 KiB After Width: | Height: | Size: 130 KiB |
|
Before Width: | Height: | Size: 16 KiB After Width: | Height: | Size: 16 KiB |
|
Before Width: | Height: | Size: 31 KiB After Width: | Height: | Size: 31 KiB |
|
Before Width: | Height: | Size: 425 KiB After Width: | Height: | Size: 425 KiB |
|
Before Width: | Height: | Size: 30 KiB After Width: | Height: | Size: 30 KiB |
|
Before Width: | Height: | Size: 63 KiB After Width: | Height: | Size: 63 KiB |
|
Before Width: | Height: | Size: 164 KiB After Width: | Height: | Size: 164 KiB |
|
Before Width: | Height: | Size: 2.7 KiB After Width: | Height: | Size: 2.7 KiB |
|
Before Width: | Height: | Size: 94 KiB After Width: | Height: | Size: 94 KiB |
|
After Width: | Height: | Size: 20 KiB |
|
Before Width: | Height: | Size: 18 KiB After Width: | Height: | Size: 18 KiB |
|
|
@ -3,7 +3,7 @@ tags:
|
||||||
- theorems
|
- theorems
|
||||||
---
|
---
|
||||||
|
|
||||||
# The Property of Additive Identity
|
# Property of Additive Identity
|
||||||
|
|
||||||
**Let $a$ represent any member of $\mathbb{W}$ or $\mathbb{Z}$ then:**
|
**Let $a$ represent any member of $\mathbb{W}$ or $\mathbb{Z}$ then:**
|
||||||
|
|
||||||
|
|
|
||||||
|
|
@ -4,7 +4,7 @@ tags: []
|
||||||
created: Friday, June 28, 2024
|
created: Friday, June 28, 2024
|
||||||
---
|
---
|
||||||
|
|
||||||
# Concise mapping of object subfileds in JS
|
# Concise mapping of object subfields in JS
|
||||||
|
|
||||||
## Scenario
|
## Scenario
|
||||||
|
|
||||||
|
|
|
||||||
|
|
@ -56,8 +56,8 @@ arithmetic.
|
||||||
|
|
||||||

|

|
||||||
|
|
||||||
The main contenders were the Pascaline of #Pascal (which only did cumulative
|
The main contenders were the Pascaline of Pascal (which only did cumulative
|
||||||
addition) and the wheel or "stepped drum" calculator of #Leibniz that could do
|
addition) and the wheel or "stepped drum" calculator of Leibniz that could do
|
||||||
all operations (in theory).
|
all operations (in theory).
|
||||||
|
|
||||||
Subsequent designs were based on these artefacts. In practice, neither worked
|
Subsequent designs were based on these artefacts. In practice, neither worked
|
||||||
|
|
@ -73,7 +73,7 @@ with other mechanical calculators. In the US, Burroughs dominated the market.
|
||||||
|
|
||||||
## Babbage: mechanized, automated calculation
|
## Babbage: mechanized, automated calculation
|
||||||
|
|
||||||
> I wish to God these calculations had been executed by Steam (#Babbage)
|
> I wish to God these calculations had been executed by Steam (Babbage)
|
||||||
|
|
||||||
With Babbage's machines we see an approach to computation that can only be
|
With Babbage's machines we see an approach to computation that can only be
|
||||||
understood against the backdrop of the Industrial Revolution in which they were
|
understood against the backdrop of the Industrial Revolution in which they were
|
||||||
|
|
@ -97,23 +97,23 @@ automatically generated.
|
||||||
|
|
||||||
The DE's single purpose was to calculate and output mathematical tables such as
|
The DE's single purpose was to calculate and output mathematical tables such as
|
||||||
the results of polynomial equations. The idea was that you would input the
|
the results of polynomial equations. The idea was that you would input the
|
||||||
answer a bell would ring and the machine would _halt_. This influenced #Turing
|
answer a bell would ring and the machine would _halt_. This influenced Turing
|
||||||
later. It was non-programmable and designed for a specific set of calculations.
|
later. It was non-programmable and designed for a specific set of calculations.
|
||||||
|
|
||||||
### Analytical Engine
|
### Analytical Engine
|
||||||
|
|
||||||
Conceived as a general-purpose computing machine capable of perfoming a wide
|
Conceived as a general-purpose computing machine capable of performing a wide
|
||||||
range of calculations, programmable using punched cards similar to those used
|
range of calculations, programmable using punched cards similar to those used
|
||||||
with Jacquard looms.
|
with Jacquard looms.
|
||||||
|
|
||||||
It more resembled modern computers in that Babbage used concepts that would
|
It more resembled modern computers in that Babbage used concepts that would
|
||||||
later translate into the #vonNeumann architecture. There was a "mill" (CPU),
|
later translate into the [von Neumann architecture](CPU_architecture.md) There
|
||||||
"store" (memory) and input/output mechanisms. It also had a concept of looping
|
was a "mill" (CPU), "store" (memory) and input/output mechanisms. It also had a
|
||||||
and conditional branching.
|
concept of looping and conditional branching.
|
||||||
|
|
||||||
### Lovelace's insight
|
### Lovelace's insight
|
||||||
|
|
||||||
A central idea of Ada #Lovelace, expressed in her notes on the Analytical Engine
|
A central idea of Ada Lovelace, expressed in her notes on the Analytical Engine
|
||||||
is that **number can represent entities other than quantity**.
|
is that **number can represent entities other than quantity**.
|
||||||
|
|
||||||
If we assign meaning to number, results arrived at by operating on number
|
If we assign meaning to number, results arrived at by operating on number
|
||||||
|
|
@ -208,8 +208,8 @@ various mechanical parts were prone to wear and needed frequent replacement.
|
||||||
|
|
||||||
Designed by Howard Aiken and built by IBM (1937-1944). Also known as the
|
Designed by Howard Aiken and built by IBM (1937-1944). Also known as the
|
||||||
_Automatic Sequence Controlled Calculator_ (ASCC). A general-purpose
|
_Automatic Sequence Controlled Calculator_ (ASCC). A general-purpose
|
||||||
electro-mechanical computer it was most famously used at Los Alamos by
|
electro-mechanical computer it was most famously used at Los Alamos by von
|
||||||
#vonNeumann to calculate the blast yield of the atomic bomb.
|
Neumann to calculate the blast yield of the atomic bomb.
|
||||||
|
|
||||||

|

|
||||||
|
|
||||||
|
|
@ -307,20 +307,20 @@ than binary and had punch card input and output. It was crudely programmable and
|
||||||
could be set up to work on different problems by rearranging the different
|
could be set up to work on different problems by rearranging the different
|
||||||
components using switches and plugboards. But this took roughly two days.
|
components using switches and plugboards. But this took roughly two days.
|
||||||
|
|
||||||
It's design was very influential because it was made public and not classified.
|
Its design was very influential because it was made public and not classified.
|
||||||
|
|
||||||
### EDVAC (1944-49) John Mauchly/J.P Eckert/ John von Neumann
|
### EDVAC (1944-49) John Mauchly/J.P Eckert/ John von Neumann
|
||||||
|
|
||||||
Built at the Moore School for the BRL as a successor to ENIAC by Mauchly and
|
Built at the Moore School for the BRL as a successor to ENIAC by Mauchly and
|
||||||
Eckert whilst ENIAC was still operational. It's architecture arose out of
|
Eckert whilst ENIAC was still operational. It's architecture arose out of
|
||||||
discussions between #vonNeumann and Mauchly and Eckert and was necessitated by
|
discussions between von Neumann and Mauchly and Eckert and was necessitated by
|
||||||
the need to calculate the behaviour of the fissile materials in the atomic bomb.
|
the need to calculate the behaviour of the fissile materials in the atomic bomb.
|
||||||
|
|
||||||
It resulted in the famous _First Draft of a Report on the EDVAC_ by #vonNeumann
|
It resulted in the famous _First Draft of a Report on the EDVAC_ by von Neumann
|
||||||
which is seen as the definitive statement of the modern **digital programmable
|
which is seen as the definitive statement of the modern **digital programmable
|
||||||
general-purpose computer**.
|
general-purpose computer**.
|
||||||
|
|
||||||
As a result of the paper, #vonNeumann effectively got the credit for the
|
As a result of the paper, von Neumann effectively got the credit for the
|
||||||
invention even though it synthesised ideas from the ENIAC and the contributions
|
invention even though it synthesised ideas from the ENIAC and the contributions
|
||||||
of others to the EDVAC.
|
of others to the EDVAC.
|
||||||
|
|
||||||
|
|
@ -421,7 +421,7 @@ variety of different electronic methods for memory:
|
||||||
|
|
||||||
#### The Automatic Computing Engine (ACE) (1946) Alan Turing
|
#### The Automatic Computing Engine (ACE) (1946) Alan Turing
|
||||||
|
|
||||||
- Technical design provided by Alan #Turing working at the Mathematics Division
|
- Technical design provided by Alan Turing working at the Mathematics Division
|
||||||
of the National Physical Laboratory. The product of Turing's theoretical work
|
of the National Physical Laboratory. The product of Turing's theoretical work
|
||||||
in "On Computable Numbers" where he proposes the concept of a
|
in "On Computable Numbers" where he proposes the concept of a
|
||||||
[Turing_machine](Turing_machines.md) and based on his experience with early
|
[Turing_machine](Turing_machines.md) and based on his experience with early
|
||||||
|
|
@ -700,7 +700,7 @@ chips, they advised the company to use a general purpose chip that could handle
|
||||||
general computing as well as the basic calculator functions. This generic chip -
|
general computing as well as the basic calculator functions. This generic chip -
|
||||||
the Intel 4004 - was the microprocessor combined with three other ICs
|
the Intel 4004 - was the microprocessor combined with three other ICs
|
||||||
(comprising 2.3k transistors) that comprised the fundamental building blocks of
|
(comprising 2.3k transistors) that comprised the fundamental building blocks of
|
||||||
the #vonNeumann architecture.
|
the von Neumann architecture.
|
||||||
|
|
||||||

|

|
||||||
|
|
||||||
|
|
|
||||||
31
zk/Weaving_the_Web_Berners_Lee.md
Normal file
|
|
@ -0,0 +1,31 @@
|
||||||
|
---
|
||||||
|
tags: [literature, socio-political, world-wide-web]
|
||||||
|
created: Monday, November 04, 2024
|
||||||
|
---
|
||||||
|
|
||||||
|
# Weaving the Web (Berners-Lee, 1999)
|
||||||
|
|
||||||
|
Tim did not really conceive of the possibility of the centralising and
|
||||||
|
totalising effects of social media:
|
||||||
|
|
||||||
|
_The Web's universality leads to a thriving richness and diversity. If a company
|
||||||
|
claims to give access to the world of information, then presents a filtered
|
||||||
|
view, the Web loses its credibility._ (p.143)
|
||||||
|
|
||||||
|
_Happily, the Web is so huge that there's no way any one company can dominate
|
||||||
|
it. All the human effort people and organisations have put in all over the world
|
||||||
|
to create Web sites and home pages is astoundingly large, and most of the effort
|
||||||
|
has to do with what's in the Web, not the software used to browse it. The Web's
|
||||||
|
content, and thus value, will continue despite any one company's actions._
|
||||||
|
(p.144)
|
||||||
|
|
||||||
|
Apropos the "alt-right" etc:
|
||||||
|
|
||||||
|
_The analogy of a global brain is tempting, because Web and brain both involve
|
||||||
|
huge numbers of elements - neurons and Web pages - and a mixture of structure
|
||||||
|
and apparent randomness. However, a brain has an intelligence that emerges on
|
||||||
|
quite a different level from anything that a neuron could be aware
|
||||||
|
of...[W]riters have contemplated an 'emergent property' arising from the mass of
|
||||||
|
humanity and computers. But remember that such a phenomenon would have its own
|
||||||
|
agenda. We would not as individuals be ware of it, let alone control it, any
|
||||||
|
more than the neuron controls the brain._ p.222
|
||||||
52
zk/c301a0b3-1d8_Mosaic_Netscape_and_Browser_Wars.md
Normal file
|
|
@ -0,0 +1,52 @@
|
||||||
|
---
|
||||||
|
tags: [world-wide-web, computer-history, Microsoft]
|
||||||
|
created: Sunday, November 03, 2024
|
||||||
|
---
|
||||||
|
|
||||||
|
# c301a0b3-1d8_Mosaic_Netscape_and_Browser_Wars
|
||||||
|
|
||||||
|
The Mosaic browser was conceived and produced at the University of Illinois
|
||||||
|
during the very early growth of the Web, when TBL was still at CERN.
|
||||||
|
|
||||||
|
_Mosaic_:
|
||||||
|
|
||||||
|

|
||||||
|
|
||||||
|
It became the best of the early browsers (a group that included ViolaWWW and
|
||||||
|
Erwise) with the notable advantage of being able to embed graphics alongside
|
||||||
|
text (instead of inside a separate window). It also supported multiple
|
||||||
|
[application layer](Application_Layer_of_Internet_Protocol.md) protocols - FTP,
|
||||||
|
the Network News Transfer Protocol, Gopher - not just HTTP.
|
||||||
|
|
||||||
|
At this point there were nascent browsers for different operating systems and
|
||||||
|
which browser you used was mostly determined by your OS. Being the product of a
|
||||||
|
US university, Mosaic was originally written for Unix's X-Window system but was
|
||||||
|
ported to multiple OSs later, a key factor in its success and uptake.
|
||||||
|
|
||||||
|
Mosaic's creators formed their own company outside of the university: Netscape.
|
||||||
|
The browser they created, Netscape Navigator became the heir to Mosaic, released
|
||||||
|
in 1994.
|
||||||
|
|
||||||
|
_Netscape Navigator_:
|
||||||
|
|
||||||
|

|
||||||
|
|
||||||
|
It was made free of charge for non-commercial use which assured rapid uptake.
|
||||||
|
This was done to outrun Microsoft's Internet Explorer (released two months after
|
||||||
|
Netscape went public) which they intended to bundle with all new versions of
|
||||||
|
Windows 95. Netscape became the de facto standard browser during the early Web,
|
||||||
|
including on Windows. It took a few years for IE to overtake it.
|
||||||
|
|
||||||
|
_Internet Explorer 1 with licensing info_:
|
||||||
|
|
||||||
|

|
||||||
|
|
||||||
|
Netscape also birthed JavaScript, which was written rapidly specifically for the
|
||||||
|
browser. Prior to this, dynamic client-side functionality was provided by Java
|
||||||
|
'applets' which never really took off.
|
||||||
|
|
||||||
|
IE in fact shares a genealogy with Mosaic since Microsoft licensed a version of
|
||||||
|
the Mosaic code and used it to construct IE.
|
||||||
|
|
||||||
|
By the end of the 1990s, Netscape's usage had declined precipitously as IE
|
||||||
|
captured the market share.
|
||||||
19
zk/ecec56e6_precursors_to_search_engines.md
Normal file
|
|
@ -0,0 +1,19 @@
|
||||||
|
---
|
||||||
|
tags: [world-wide-web, computer-history]
|
||||||
|
created: Monday, November 04, 2024
|
||||||
|
---
|
||||||
|
|
||||||
|
# ecec56e6_precursors_to_search_engines
|
||||||
|
|
||||||
|
Before search engines as searchable indices of all content on the web, the
|
||||||
|
custom was for ISPs, browsers and websites (e.g. Yahoo!) to provide directories
|
||||||
|
of links to other sites. They functioned as sort of global web-portals.
|
||||||
|
|
||||||
|

|
||||||
|
|
||||||
|
_The Yahoo! homepage from 1999._
|
||||||
|
|
||||||
|

|
||||||
|
|
||||||
|
_The AltaVista homepage from 1999. It has a primitive search engine but also
|
||||||
|
directories of sites._
|
||||||
36
zk/f6564af9_AOL_and_early_internet_enclosure.md
Normal file
|
|
@ -0,0 +1,36 @@
|
||||||
|
---
|
||||||
|
tags: [world-wide-web, computer-history, internet, socio-political]
|
||||||
|
created: Monday, November 04, 2024
|
||||||
|
---
|
||||||
|
|
||||||
|
# f6564af9_AOL_and_early_internet_enclosure
|
||||||
|
|
||||||
|
We might view AOL, with it's millions of 'free trial' CD-ROMs, as the first
|
||||||
|
attempt by a corporate entity to try and enclose the Internet/Web. To take the
|
||||||
|
vase informational expanse and reduce it to a single, filtered and contained
|
||||||
|
space controlled by a single company.
|
||||||
|
|
||||||
|

|
||||||
|
|
||||||
|
_AOL interface from 1993_
|
||||||
|
|
||||||
|
This would later be achieved or approximated more effectively by Google (under
|
||||||
|
the guise of doing the opposite - people are "empowered" to access the
|
||||||
|
information they otherwise would not find, granted a key to the Internet etc.
|
||||||
|
When in fact, making everyone go through the same gate enables surveillance and
|
||||||
|
the monetisation of the use of a public resource) and then of course by the
|
||||||
|
social media companies.
|
||||||
|
|
||||||
|
AOL in fact started this even before there was a Web, pioneering the concept of
|
||||||
|
a web portal, with their [modem-based](cfbef1c4_web_precursors.md) private-BBS
|
||||||
|
business model. This provided access to a circumscribed subset of the Internet
|
||||||
|
at a time when accessing information was opaque and confusing to the average
|
||||||
|
non-technical user. The advent of the web first threatened and then basically
|
||||||
|
obviated this model, when access to information via browsers and HTTP servers
|
||||||
|
made the process easier and more democratized. Hence why AOL then tellingly
|
||||||
|
pivoted to the browser and search-engine market, the next available mechanism of
|
||||||
|
enclosure.
|
||||||
|
|
||||||
|

|
||||||
|
|
||||||
|
_AOL interface from 1999_
|
||||||