# getting numbers for theorems, propositions,

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.

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}


• Dear Gonzalo Medina – Azadeh Nikseresht May 25 '13 at 20:42
• Dear Gonzalo Medina It was so helpful..thank you very much..thank you – Azadeh Nikseresht May 25 '13 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?. – Gonzalo Medina May 25 '13 at 20:52
• Yes, your answer solved my problem. I will certainly do it. – Azadeh Nikseresht May 25 '13 at 21:01