## Hypertext Help with LaTeX

### Displaymath

There are four environments that put LaTeX in math mode:
math, displaymath,
eqnarray, and
equation. The math environment is
for formulas that appear right in the text. The displaymath and
equation environments are for formulas that appear on their own
line; they differ only insofar as the latter prints an equation
number. LaTeX will **not** break lines in
displaymath or equation environments unless told to do so with a
`\\` command.

The displaymath environment can be entered by

\begin{displaymath} math equation \\ second line of math equation \end{displaymath}

Because displaymath may be used frequently to display relatively short equations, there are convenient alternative forms:

\[ displayed math equation \]

or (the following does not seem to be well documented, but appears to work)

$$ displayed math equation $$

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Revised 5 Jun 1995.