0

I would like to give the theorem/lemma/definition/... environment an individual number. For example:

1 Section

Theorem 20.1. (XXX) ...
Definiton 21.2.1.: ...

Here is the "20.1." and "21.2.1" individual numbers that I would add/pass to the theorem/definition environment. The goal is an independent numbering from the previous theorem, lemma, etc. How can I implement this?

5
  • Please be a bit more specific. What is 20 and 1 in this case and similar for 21, 2 and 1. – daleif Jan 22 '20 at 9:44
  • So you would like to number the theorems manually each time a theorem environment is called? – Vincent Jan 22 '20 at 15:26
  • Yes, that is right. – Marc Jan 22 '20 at 15:28
  • What's the reason for manual numbering? – egreg Jan 22 '20 at 15:52
  • I am studying mathematics and I copy the theorems, definitions, etc. from the math script; quasi as a collection. The numbering is continued by remarks and examples, but they do not interest me. In order to be able to refer to what is written in the script, I would like to insert the original numbering. Thanks! – Marc Jan 22 '20 at 17:22
1

You can define two generic environments and assign manually the numbers.

\documentclass{article}
\usepackage{amsthm}

\newtheorem*{innerthm}{\innerthmname}
\newcommand{\innerthmname}{}% initialize
\newenvironment{statement}[1]
 {\renewcommand{\innerthmname}{#1}\innerthm}
 {\endinnerthm}
\theoremstyle{definition}
\newtheorem*{innerdfn}{\innerthmname}
\newenvironment{upstatement}[1]
 {\renewcommand{\innerthmname}{#1}\innerdfn}
 {\endinnerdfn}

\begin{document}

\begin{statement}{Theorem 20.1}[XXX]
Some text.
\end{statement}

\begin{statement}{Lemma 15.2}
Some text.
\end{statement}

\begin{upstatement}{Definition 20.1.2}
Some text.
\end{upstatement}

\end{document}

enter image description here

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.