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

  a = b + 1 % no & here!

AFAICT the visual difference is minimal. Still, should I convert all this to \begin{equation}?

(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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@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
up vote 4 down vote accepted

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

share|improve this answer
This suggests that I convert all equations. However, the link and the documents linked from it and the answers do not seem to give any information for my specific question: single line, no alignment (i.e. no &). No source says anything bad (or good) about that (unless I missed something). So while your answer certainly is good general advice, I am not sure how it applies here. – WolframH Sep 2 '12 at 20:41
@WolframH If you don't want to edit your document, fine. But you'll do yourself a favor using the right environment for each equation or group thereof. This doesn't include eqnarray. :) – egreg Sep 2 '12 at 20:48
Thanks for your great and helpful comment. I'll accept the answer. – WolframH Oct 6 '12 at 12:15

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