Is it possible to have single theorems without numbering? I would like to be able to switch them off individually with asterisk-* or have a nono-theorem environment.
\newtheorem{theorem}{Theorem}
\newtheorem{nono-theorem}{Theorem}[]
Add a comment
|
3 Answers
Using the amsthm package, you can switch numbering on and off for individual theorems just by defining environments with nearly identical names (as with equation environments):
\documentclass{article}
\usepackage{amsthm}
\theoremstyle{plain}
\newtheorem*{theorem*}{Theorem}
\newtheorem{theorem}{Theorem}
\begin{document}
\begin{theorem} A numbered theorem. \end{theorem}
\begin{theorem*} An unnumbered theorem. \end{theorem*}
\end{document}
answered Sep 30, 2011 at 11:22
-
1I have a question, and I didn't want to open another topic of the same type. I have defined, like here the definition, but when I use it I have a dot afterwards. Like: Definition. Bla bla bla... How to get rid of that dot?– dingo_dNov 11, 2011 at 12:05
-
1@dingo_d: Check out the
\newtheoremstylecommand provided by theamsthmpackage; that will allow you to define new "styles" for theorems (e.g. change the punctuation, as you're asking for) in a reasonably flexible way. Nov 11, 2011 at 16:43 -
@ Niel de Beaudrap: After a bit of searching (like few min after I posted this) I found that I can very easily manipulate with much more than just dot or no dot in the theorem environment :D So the problem is solved :D– dingo_dNov 11, 2011 at 18:09
(It's more of a comment.)
You can define a new theorem with a star:
\documentclass{article}
\usepackage{lipsum}
\usepackage{ntheorem}
\newtheorem{theorem}{Theorem}
\newtheorem*{theorem-non}{Theorem}
\begin{document}
\begin{theorem}
\lipsum[1]
\end{theorem}
\begin{theorem-non}
\lipsum[1]
\end{theorem-non}
\end{document}
answered Sep 30, 2011 at 11:05
An alternative I've used goes as follows. Include this at the top of your file:
\def\theorem{\par\noindent{\bf Theorem.\ } \ignorespaces}
\def\endtheorem{}
Then create a theorem with:
\begin{theorem}
\end{theorem}
Nice for things like
\def\problemstatement{\par\noindent{\bf Problem Statement.\ } \ignorespaces}
\def\endproblemstatement{}
or
\newcommand{\bBox}{\hbox{\vrule width1.3ex height1.3ex}}
\def\proof{\par\noindent{\bf Proof.\ } \ignorespaces}
\def\endproof{{\ \hspace*{\fill}\bBox \parfillskip 0pt}\smallskip\noindent}
