[OS X TeX] multi lines
Maarten Sneep
maarten.sneep at xs4all.nl
Wed Aug 31 22:37:29 CEST 2005
On 31 Aug 2005, at 22:17, Alain Schremmer wrote:
> William F. Adams wrote:
>
>> Have you tried:
>>
>> \begin{align*}
>> \mbox{Long line}\\
>> &= \mbox{Line 1}\\
>> &= \mbox{Line 2}
>> \end{align*}
>>
>
> This seems to be doing something similar to [equation,split] in
> that the = signs for Line 1 and Line 2 are lined up with the end
> of Long line, as in
>
> Long line
> = Line 1
> = Line 2
>
> My problem, though, is that length(Long line) + length(Line 1) >
> width(page) so that, for things to remain within the page, the =
> of Line 1 and Line 2 have to line up with, say, about the middle of
> Long line.
Since the & does not introduce any extra space when using the amsmath
package (as opposed to standard LaTeX), you can use something like this:
\documentclass[a4paper,12pt]{article}
\usepackage{amsmath}
\begin{document}
\begin{equation*}
\begin{split}
\int_a^b \biggl\{ \int_a^b &[ f(x)^2 g(y)^2 + f(y)^2 g(x)^2 ]
-2f(x) g(x) f(y) g(y) \,dx \biggr\} \,dy \\
&=\int_a^b \biggl\{ g(y)^2 \int_a^b f^2 + f(y)^2
\int_a^b g^2 - 2f(y) g(y) \int_a^b fg \biggr\} \,dy \\
&=\int_a^b \biggl\{ g(y)^2 \int_a^b f^2 + f(y)^2
\int_a^b g^2 - 2f(y) g(y) \int_a^b fg \biggr\} \,dy
\end{split}
\end{equation*}
\end{document}
Note the extra ampersand I plunked in the middle (well the start) of
the first line.
Maarten
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