Take the 2-minute tour ×  in my paper the text inside theorem is
italic while the word Theorem 1 is bold and not italic. I would
like to have a title of the theorem also not italic. The example
is here:  Theorem 1. (The title) Let the set...  How can I do
it? I tried to type \begin{theorem}{title here} but it doesn't
work.  share|improve this question add comment  2 Answers  up
vote 12 down vote accepted   \begin{theorem}[The title] Some
statement  should do what you want. The standard LaTeX setting
prints in boldface also the title, which doesn't happen when
amsthm is loaded.  share|improve this answer Thanks, it works.
–  Ilya Jul 3 '11 at 19:39 @Gortaur: with default settings also
the title would be bold. –  Stefan Kottwitz Jul 3 '11 at 19:46
@Stefan Not with amsthm, which I prefer. –  egreg Jul 3 '11 at
19:58 @egreg: I prefer it too. It just hasn't been mentioned in
the question, so I tested without. –  Stefan Kottwitz Jul 3 '11
at 20:12 add comment  You might like to test
\newtheorem{theorem}{\textit{The