# Use of the Ruby Module with MathML

## William F. Hammond

Copyright © 2001 William F. Hammond

This is an XHTML document that uses the MathML and Ruby extensions of
basic XHTML markup.

The square of x is entered here using MathML:
${x}^{2}$

Here is a displayed form of the Weierstrass infinite product expansion
of the gamma function.

$${\int}_{0}^{\infty}{t}^{x}{e}^{\mathrm{-t}}\frac{\mathrm{dt}}{t}=\frac{1}{x}{\prod}_{k=1}^{\infty}\frac{{\left(1+\frac{1}{k}\right)}^{x}}{\left(1+\frac{x}{k}\right)}$$

This web page is offered as an example of a fully functioning
XHTML 1.1 plus MathML 2.0 document that is both safe and usable
in a wide array of legacy web browsers such as NetScape 4.5 and
lynx 2.8 (rel 2).