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I want to number theorems (or propositions,...) as Theorem 1.1 and Theorem 1.A simultaneously in a text? In fact, I don't know how to mark some theorems (or propositions,...) as Theorem 1.A, Theorem 1.B,...? Thanks for your answers.

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1 Answer 1

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One possibility would be to have two theorem-like structures with the same name, but one with arabic numbering and the other one with alphabetic numbering; here's an illustration using the amsthm package:

\documentclass{book}
\usepackage{amsthm}

\newtheorem{theo}{Theorem}[chapter]
\newtheorem{atheo}{Theorem}[chapter]

\renewcommand\theatheo{\arabic{chapter}.\Alph{atheo}}

\begin{document}

\chapter{Test Chapter}
\begin{theo}
Test theorem with arabic numbering.
\end{theo}
\begin{atheo}
Test theorem with alphabetic numbering.
\end{atheo}
\begin{atheo}
Another test theorem with alphabetic numbering.
\end{atheo}
\begin{theo}
Another test theorem with arabic numbering.
\end{theo}

\end{document}

enter image description here

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  • Dear Gonzalo Medina Commented May 25, 2013 at 20:42
  • Dear Gonzalo Medina It was so helpful..thank you very much..thank you Commented May 25, 2013 at 20:45
  • @AzadehNikseresht you're welcome! If you consider my answer solved your problem, don't forget to accept it by clicking the checkmark to its left. In case of doubt, please see How do you accept an answer?. Commented May 25, 2013 at 20:52
  • Yes, your answer solved my problem. I will certainly do it. Commented May 25, 2013 at 21:01

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