On Wed, May 09, 2001 at 09:01:17PM +0200, Herbert Voss wrote:
> \begin{align}
> .. & ..\\
> \end{align}
>
> better spacing than \begin{eqnarray}
> implicit \begin{array}{rl} ... \end{array}
It is also possible to have
\begin{align}
.. & .. & .. & .. \\
\end{align}
which implies \begin{array}{rlrl} .. \end{array}
or even have more columns. Note that contrary to alignat here you do not
give the number of columns as an argument !
> ------------------------------------------
>
> \begin{alignat}{n}
> .. & .. & .. & .. ... n-times the & ..\\
> \end[alignat}
>
> called align at several places
> implicit \begin{array}{rlrlrl...} ... \end{array}
The number of & is 2n-1 (i.e. there are 2n columns)
> ------------------------------------------
>
> \begin{split}
> .. & ..\\
> & ..\\ <-- empty left side!!
> & ..
> end{split}
>
> vertical alignment for long equations
> implicit \begin{array}{rl} ... \end{array}
> kind of mutiline notnumbert and no *version
Unlike align and the other ams env. the split env. is used inside other
displayed equation env. such as equation or align
i.e. \[ ... \begin{split} ... \end{split} ... \]
In other words, it behave like the array env.
There are also aligned, gathered, and alignedat env. which behave like
align/gather/alignat, but again, they are used in other displayed equation env.
