MathJax

MathJax is a client-side javascript that allows for very nice rendering of formula written in LaTeX, much like jsMath.

The advantages of MathJax over jsMath:

• MathJax seems actively developed for now
• MathJax uses server-side fonts, and so does not require any configuration on the client side to get better results
• MathJax supports LaTeX macros
• Better LaTeX support

$\newcommand{\ud}{\,\mathrm{d}}$

Example

Simple examples:

formula	Textstyle ($...$)	Displaystyle ($$...$$)
\frac{x}{1+\frac{x}{1+y}}	$\frac{x}{1+\frac{x}{1+y}}$	$$\frac{x}{1+\frac{x}{1+y}}$$
\newcommand{\ud}{\,\mathrm{d}} \int_a^b f(x)\ud x	$\int_0^\infty f(x)\ud x$	$$\int_0^\infty f(x)\ud x$$

From [1]:

$ \newcommand{\Re}{\mathrm{Re}\,} \newcommand{\pFq}[5]{{}_{#1}\mathrm{F}_{#2} \left( \genfrac{}{}{0pt}{}{#3}{#4} \bigg| {#5} \right)} $ We consider, for various values of $s$, the $n$-dimensional integral \begin{align} \label{def:Wns} W_n (s) &:= \int_{[0, 1]^n} \left| \sum_{k = 1}^n \mathrm{e}^{2 \pi \mathrm{i} \, x_k} \right|^s \mathrm{d}\boldsymbol{x} \end{align} which occurs in the theory of uniform random walk integrals in the plane, where at each step a unit-step is taken in a random direction. As such, the integral \eqref{def:Wns} expresses the $s$-th moment of the distance to the origin after $n$ steps. By experimentation and some sketchy arguments we quickly conjectured and strongly believed that, for $k$ a nonnegative integer \begin{align} \label{eq:W3k} W_3(k) &= \Re \, \pFq32{\frac12, -\frac k2, -\frac k2}{1, 1}{4}. \end{align} Appropriately defined, \eqref{eq:W3k} also holds for negative odd integers. The reason for \eqref{eq:W3k} was long a mystery, but it will be explained at the end of the paper.