# Sandbox

Here is the Sandbox. Click on the edit tab and experiment with the editor.

This week's event calendar.

Here is how to make a link to another web page: How to use the editor.

## Portability

There is a portability issue.

• Our wiki is powered by jsMath by default (and at some moment we switch to MathJax - which is a late β), other wikis are powered by TeX 2 png.
• So, if you want to have your input be portable to them use  tags.
• However our website and blogs and forums when/if they will be created are powered by jsMath as well and tags  are not enabled there.
• For portability across our webspace use $\$...\$$and \\...\\$$ tags Victor 10:57, 3 February 2010 (UTC)

### What's wrong?

$y$

$y$

The reason is that in wiki double and triple single quotation marks are formatting commands. Make space between them

$y' '$ $y' ' '$

Victor 20:07, 4 February 2010 (UTC)

## List of Items

• item after an asterisk.
• another item.
• Subitem
• Another Subitem
• And down the hierarchy

$e^{2\pi k\cdot x}$ between three quotations

## Between two equals

You can boldly write eiπ + 1 = 0 among 'other things'. Or you can italize (one needs to use single quotation marks thrice and twice respectively)

Ida is new to Wiki.

$$T\oplus T^*$$ or $X^3,$ both display math types work. $T\oplus T^*$ is new. Oh I see. If you use the usual Latex format then jsmath is used. But if you use the math html tags then something else happens, but it looks jaggedy.

Apparently so does $\longrightarrow$ inline but not xypic: $\xymatrix{0\ar[r]&1}$

Sure not - as it is not LaTeX and AMSmath command but requires some package and loading many extensions will make rendering slow. I suggest to use png here Victor 19:50, 8 January 2010 (UTC)

Actually there is xyjax and when it matures it will be possible to use. Victor 17:01, 25 January 2012 (EST)

− Δu = 0

$\int_{0}^{\infty}\frac{1}{x}dx$

$\int_{0}^{\infty}\frac{1}{x}dx$

$\left( \frac{\partial}{\partial t} + u_0 \frac{\partial}{\partial x} \right) \left( \frac{\partial^{2} \Psi_1}{\partial x^{2}} + \frac{\partial^{2} \Psi_1}{\partial y^{2}} + B^{-1} \frac{\partial^{2} \Psi_1}{\partial z^{2}} \right) + \frac{\partial \Psi_1}{\partial x} \left( \beta_{\ell} - \frac{d^2 u_0}{d y^2} \right) = 0$

• DisplayMath

$\left( \frac{\partial}{\partial t} + u_0 \frac{\partial}{\partial x} \right) \left( \frac{\partial^{2} \Psi_1}{\partial x^{2}} + \frac{\partial^{2} \Psi_1}{\partial y^{2}} + B^{-1} \frac{\partial^{2} \Psi_1}{\partial z^{2}} \right) + \frac{\partial \Psi_1}{\partial x} \left( \beta_{\ell} - \frac{d^2 u_0}{d y^2} \right) = 0$

Inline Math: $\int_{0}^{\infty}\frac{1}{x}dx$

$$\def\pLaTeX{\rm\color{red} {L\kern-.325em\raise.21em{\scriptstyle{A}}\kern-.17em\TeX}\ \color{blue} {L\kern-.325em\raise.21em{\scriptstyle{A}}\kern-.17em\TeX}}$$

$\pLaTeX$ $\pLaTeX$ $\pLaTeX$ $\pLaTeX$ $\pLaTeX$ $\pLaTeX$ $\pLaTeX$

• If you wonder how people do this press "Edit" or "View source" (if you have not edit permission)

$\sum F(n)=\frac {1}{2\pi}\sum \hat {F}(n)$ 18:20, 13 January 2010 (UTC)

$$\sum_{k=-N}^{k=N}$$

$$\left\{ \begin{matrix} a & b \\ c & d \\ \end{matrix} \right\}$$

$\sum_{i = 0}^{N} \frac{1}{x}$

## Experimenting with Student

$$\int_a^b f'(s) ds = f(b) - f(a) .$$

## Tables and Images

 265px 235px Nibelungen Bridge to Wormsacross the Rhine Worms and its sister cities

$\ \frac{\pi^2}6 = \frac1{1^2} + \frac1{2^2} + \frac1{3^2} + \frac1{4^2} + \frac1{5^2} + ...$ Do not use  tags!!! Use $\$... \$$or \\...\\$$ instead!

## Mathfonts

$A$, $\mathrm{A}$, $\mathsf{A}$, $\mathbf{A}$, $\mathcal{A}$, $\mathscr{A}$, $\mathfrak{A}$, $\mathbb{A}$

$\alpha$, $\boldsymbol{\alpha}$,

Hello Let's Talk Science $\int f' ds = f + C$.