"Environment theorem* undefined"

Asked Nov 12 '17 at 08:48

Active Nov 12 '17 at 08:48

Viewed 1,955 times

Consider the following LaTeX2e manuscript

\documentclass{scrartcl}
\usepackage{amsthm}
\newtheorem{theorem}{Theorem}
\begin{document}
\begin{theorem*}[Hello World]
Hello, world!
\end{theorem*}
\end{document}

When I compile it with pdflatex, the compilation fails with the following error message:

! LaTeX Error: Environment theorem* undefined.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              

l.6 \begin{theorem*}
                    [Hello World]
?

What is the problem? How can I fix it?

asked Nov 12 '17 at 08:48

Evan Aad

11,066

2

The asterisk?? maybe? – Johannes_B Nov 12 '17 at 08:50
@Johannes_B: Yes, you're right. I thought the presence of an asterisk is supposed to indicate that the theorem should not be numbered. Apparently this doesn't happen automatically. – Evan Aad Nov 12 '17 at 08:52
3

You can use \newtheoremstyle*{lem}{Lemma}, but the documentation never states that a sudden lem* would work. – Johannes_B Nov 12 '17 at 08:54
3

You can add\newtheorem*{theorem*}{Theorem}to your preamble. – Bobyandbob Nov 12 '17 at 08:55
@Johannes_B: I thought the asterisk worked like a macro option. I was wrong. – Evan Aad Nov 12 '17 at 08:58

"Environment theorem* undefined"

0 Answers0