2012
02.26

The default style in latex, for reasons that are not clear to me, typeset lemmas and theorems as:

Lemma 2.2 Bogi bogi.

Which is of course totally wrong. The right style (as recommended in the old testemant, in the unpublished parts) is, of course:

Lemma 2.2. Bogi bogi.

It turns out that this is easy to fix. Indeed, add the following to your latex document:

\usepackage{ntheorem}
\theoremseparator{.}