3

Tomb stone (Q.E.D. mark) is not displayed at the end of a proof when I use "svmono.cls" for my dissertation. How can I enable it?

Here is the code example:

<\documentclass[12pt,sectrefs]{svmono}  
\usepackage{makeidx}        
\usepackage{graphicx}                              
\usepackage{multicol}        
\usepackage[bottom]{footmisc}
\usepackage{amsmath}
\usepackage{lipsum}
\makeindex             

\begin{document}
\frontmatter
\mainmatter

\chapter{Chapter Heading}
\section{Section Heading}
\subsection{Subsection Heading}
\begin{theorem}
\lipsum[1-2]
\end{theorem}
\begin{theorem}
  nonses\\
  nonsesnse\\
  nonsesnse\\
  nonsesnse\\
  nonsesnse\\
%nonsesnse\\
\end{theorem}


\begin{proof}
   here is the proof.
 \end{proof}


\end{document}
  • 3
    Because the proof environment in svmono is defined without the tombstone. – egreg May 12 '16 at 12:54
3

The proof environment provided by svmono does not include the automatic QED symbol. Instead it provides a clumsy method for manually adding a tombstone.

You can solve the issue by loading amsthm, so long as you continue to use svmono methods for defining new theorem-like environments.

\documentclass[12pt,sectrefs]{svmono}

\usepackage{amsmath}

\let\proof\relax\let\endproof\relax
\usepackage{amsthm}

\begin{document}

\chapter{Chapter Heading}
\section{Section Heading}
\subsection{Subsection Heading}

\begin{theorem}
Some statement
\end{theorem}

\begin{proof}
Here is the proof.
\end{proof}

\end{document}

enter image description here

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