# eqnarray or equation for single-line equations?

Normally I would use , of course. But I got a huge file (more than two hundred pages) where many equations are formatted like this:

\begin{eqnarray}
a = b + 1 % no & here!
\end{eqnarray}

AFAICT the visual difference is minimal. Still, should I convert all this to ?

(I suspect that the bigger problem might be the missing & characters around the =. If I add them, I get exactly the same output as with $...$, which should be the right thing.)

I use the svmono document class, if that is important.

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–  Marco Daniel Jul 28 '12 at 8:42
@MarcoDaniel Thanks, but that question is about a list of related equations, which I don't have here. –  WolframH Jul 28 '12 at 8:43
Use equation for single line equations (or $...$ for unnumbered ones) and never ever use eqnarray. –  egreg Jul 28 '12 at 8:46
@egreg: It seems to me your comment answers this question. Maybe you should put it as an answer!?! –  canaaerus Aug 19 '12 at 18:20

Use equation for single line equations (or $...$ for unnumbered ones) and never ever use eqnarray. See \eqnarray vs \align for more information.