14.9 @math: Inserting Mathematical Expressions

You can write a short mathematical expression with the @math command. Write the mathematical expression between braces, like this:

     @math{(a + b)(a + b) = a^2 + 2ab + b^2}

This produces the following in Info and HTML:

     (a + b)(a + b) = a^2 + 2ab + b^2

Thus, the @math command has no effect on the Info and HTML output; makeinfo just reproduces the input, it does not try to interpret the mathematics in any way.

@math implies @tex. This not only makes it possible to write superscripts and subscripts (as in the above example), but also allows you to use any of the plain TeX math control sequences. It's conventional to use `\' instead of `@' for these commands. As in:

     @math{\sin 2\pi \equiv \cos 3\pi}

which looks like the input in Info and HTML:

     \sin 2\pi \equiv \cos 3\pi

Since `\' is an escape character inside @math, you can use @\ to get a literal backslash (\\ will work in TeX, but you'll get the literal `\\' in Info). @\ is not defined outside of @math, since a `\' ordinarily produces a literal `\'.

For displayed equations, you must at present use TeX directly (see Raw Formatter Commands).