# [OS X TeX] Asymmetric size in eqnarray

Morten Høgholm morten.hoegholm at latex-project.org
Wed Apr 20 16:06:18 EDT 2005

On Wed, 20 Apr 2005 12:54:57 +1000, Bruce McKellar
<b.mckellar at ph.unimelb.edu.au> wrote:

> The following produces a pair of equations in the same line, each of
> which have fractions.  But the fractions in the two equations are of
> different size.  How do I force the fractions to have the same size and
> improve the appearance of the output?
>
> \begin{eqnarray}
> &j_N=\sqrt{\frac{N}{2}(\frac{N}{2}+1)} \hspace{0.5cm}
> &j_M=\sqrt{\frac{M}{2}\left(\frac{M}{2}+1\right)}\\
> &m=\frac{N-M}{2} &J=\sqrt{|m|(|m|+1)}
> \end{eqnarray}

eqnarray is implemented as
\begin{array}{lcr}
\displaystyle <stuff> & \textstyle <relation> & \displaystyle <stuff>
...

The first fraction is in the \textstyle field thus causing it to be
typeset in a much smaller size.

Anyway, this was just to explain what was going on. The optimum solution
is to use amsmath as Herb pointed out.
--
Morten
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