C!
mouse by Footprints
memory management by Carthag
prime number language by Footprints, m_turner, enth, C-Dawg
Landau equivalent by aneurin, Gritchka
MathML by The Alchemist, Kalkin
Publishing scientific documents on the Web by ReiToei, pimephalis, BrianShader
Frobenius' theorem by BrianShader
Frost protection thanks to water by Chiisuta
shape from shading by BrianShader
golf ball flight by riverrun
capacitor by ac_hyper, koreykruse
noise pollution by BlueDragon
The Matrix Reloaded and nmap by ariels
Levenshtein distance by Carthag, m_turner
The Mission by sid
"1^p" p prime language by Brontosaurus
FreeBSD jail by Senso

(nodevertising) :: Nodes that I like that haven't received many votes :: (nodevertising)
Frobenius' theorem
Frost protection thanks to water
Memory layers

Mathematics
- Gauss-Seidel iteration
- pigeonhole principle
- prime number language 4 C! - "1^p" p prime language C!
- Landau equivalent 2 C!
- Shape from shading C!
- Euler's polynomial
- Frobenius' theorem C!
Physics
- Frost protection thanks to water C!
- golf ball flight C!
- capacitor 2 C!
Computing
- mouse C! - mouse protocol - ps2rate
- memory management C! - memory layers
- MathML 2 C!
- Publishing scientific documents on the Web 3 C!
- The Matrix Reloaded and nmap C!
- Levenshtein distance C!
- FreeBSD jail C!
Art (Litterature, Cinema)
- Quatrevingt-treize
- The Mission C!
Miscellaneous
- chain letter email
- @
- April 9, 2003
- noise pollution C!
- Axoa
- Ouagadougou

Who cares ?

I never downvote because I hate it when I get downvoted without any explanation. (+) means "I like this wu, it's factual, well written and well researched. It's a good contribution to E2". (-) means "I dislike this wu but I'm too much a coward to /msg you. Moreover I believe it's a waste of time talking to you since you're too dumb to improve it anyways."

Last updated June 5 2004 (my birthday !)

Posting Math on E2

This document explains how to embedd scientific formulae in your posts on E2. The best way to add formulae in your posts is probably to write them with the TeX syntax (because it's very close to natural syntax) and then use the superdoc to generate the corresponding MathML tags. Here are typical scripts that you will find most useful.

Simple equations

Sample : 2x+3=0
TeX script : 2x+3=0
MathML script :

<math><mrow>
  <mn>2</mn>
  <mi>x</mi>
  <mo>+</mo>
  <mn>3</mn>
  <mo>=</mo>
  <mn>0</mn>
</mrow></math>

Numbers are enclosed by a mn tag. Identifiers are enclosed by a mi tag. Operators are enclosed by a mo tag.

Fractions and square roots

Sample : (a+1)/(b+1) + sqrt(c)
TeX script : \frac{a+1}{b+1} + \sqrt{c+1}
MathML script :

<math><mrow>
  <mfrac>
    <mrow><mi>a</mi><mo>+</mo><mn>1</mn></mrow>
    <mrow><mi>b</mi><mo>+</mo><mn>1</mn></mrow>
  </mfrac>
  <mo>+</mo>
  <msqrt>
    <mrow><mi>c</mi><mo>+</mo><mn>1</mn></mrow>
  </msqrt>
</mrow></math>

Parentheses and other delimiters

Sample : f(a/b)
TeX script : f \left( \frac{a}{b} \right)
MathML script :

<math><mrow>
  <mi>f</mi>
  <mfenced open="(" close=")">
    <mfrac><mi>a</mi><mi>b</mi></mfrac>
  </mfenced>
</mrow></math>

It is possible to use different kinds of delimiters, for instace brackets and curly braces.

Polynomials

Sample : ax³ + bx² + cx + d
TeX script : ax^3 + bx^2 + cx + d
MathML script :

<math><mrow>
  <mi>a</mi>
  <msup>
    <mi>x</mi>
    <mn>3</mn>
  </msup>
  <mo>+</mo>
  <mi>b</mi>
  <msup>
    <mi>x</mi>
    <mn>2</mn>
  </msup>
  <mo>+</mo>
  <mi>c</mi>
  <mi>x</mi>
  <mo>+</mo>
  <mi>d</mi>
</mrow></math>

Sequences

Sample : u_n+1 = 1 - u_n²
TeX script : u_{n+1} = 1 - u_n^2
MathML script :

<math><mrow>
  <msub>
    <mi>u</mi>
    <mrow>
      <mi>n</mi>
      <mo>+</mo>
      <mn>1</mn>
    </mrow>
  </msub>
  <mo>=</mo>
  <mn>1</mn>
  <mo>-</mo>
  <msubsup>
    <mi>u</mi>
    <mi>n</mi>
    <mn>2</mn>
  </msubsup>
</mrow></math>

Series

Sample : Σ_n=0^+∞ a_nxⁿ
TeX script : \sum_{n=0}^{+\infty} a_n x^n
MathML script :

<math><mrow>
  <munderover>
    <mo>&sum;><mo>
    <mrow><mi>n<mi><mo>=<mo><mn>0<mn><mrow>
    <mrow><mo>+<mo><mo>&infin;<mo><mrow>
  <munderover>
  <msub>
    <mi>a<mi>
    <mi>n<mi>
  <msub>
  <msup>
    <mi>x<mi>
    <mi>n<mi>
  <msup>
<mrow></math>

Integrals

Sample : ∫₀^∞ f(t) dt
TeX script : \int_{0}^{\infty} f(t) dt
MathML script :

<math><mrow>
  <munderover>
    <mo>∫</mo>
    <mn>0</mn>
    <mo>∞</mo>
  </munderover>
  <mi>f(t)</mi>
  <mi>dt</mi>
</mrow></math>

Vectors

Sample : u^→
TeX script : \vec{u}
MathML script :

<math><mrow>
  <mover>
    <mi>u</mi>
    <mo>&rarr;</mo>
  </mover>
</mrow></math>

Complex notation

Symbols & Greek letters

nth root

Gruime