[texhax] Math Formatting Question

Barbara Beeton bnb at ams.org
Wed Aug 9 14:49:59 CEST 2006


On Tue, 8 Aug 2006, Aditya Mahajan wrote:

    On Tue, 8 Aug 2006, Zachary Leung wrote:

    > Hi guys,
    >
    > How do I format text like the following (see JPEG file)? The align
    > environment doesn't get things right for me.
    >
    > http://deutsixfive.googlepages.com/latex-math-formatting-1.jpg
    >

    \documentclass{article}
    \usepackage{amsmath}

    \begin{document}

    \begin{gather*}
       \frac {a_0}{2} + \sum_{n=1}^{\infty} a_n \cos nx
       + \sum_{n=1}^{\infty} b_n \cos nx \\
       \begin{aligned}
       \text{where}\quad a_n &= \frac {1}{\pi} \int_{-\infty}^{\infty}
                   f(x) \cos nx dx \\
        b_n &= \frac {1}{\pi} \int_{-\infty}^{\infty}
                   f(x) \sin nx dx
       \end{aligned}
    \end{gather*}

    or

    \begin{equation*}
       \frac {a_0}{2} + \sum_{n=1}^{\infty} a_n \cos nx
       + \sum_{n=1}^{\infty} b_n \cos nx
    \end{equation*}
    \begin{align*}
       \text{where}\quad a_n &= \frac {1}{\pi} \int_{-\infty}^{\infty}
                   f(x) \cos nx dx \\
        b_n &= \frac {1}{\pi} \int_{-\infty}^{\infty}
                   f(x) \sin nx dx
    \end{align*}
    \end{document}

this is a bad idea -- everything should go into a
single multi-line math environment, because the
vertical spacing between two such environments
can't be controlled very well for page breaks or
amount of spacing.  putting everything into
a {gather*} or {multline*} environment is much
more reliable.

    Have a look at Herbert Voss mathmode.pdf
    ftp://tug.ctan.org/pub/tex-archive/info/math/voss/mathmode/Mathmode.pdf

    Aditya


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