# [OS X TeX] Is There A Reason...

Louis Talman talmanl at gmail.com
Mon Apr 26 09:21:20 CEST 2010

Is there a good reason why \chapter, \section, and \subsection don't handle the $$and$$ delimiters properly, but do handle $...$ right?  Or is it a bug?  The following minimal example is from a book a colleague is writing, and we both wonder.

The example appears to compile correctly, and even displays a page in TeXShop.  But a second compile fails, and there's a mess in the .toc file that seems to cause the failure.  The mess is put there by the first compile.  What's going on?

------------Cut here----------------

\documentclass{book}

\begin{document}

\tableofcontents

\chapter{$2 \times 2$ }

\chapter{$$3 \times 3$$ }

\end{document}

------------Cut here----------------

--Lou Talman
Department of Mathematical & Computer Sciences
Metropolitan State College of Denver

<http://rowdy.mscd.edu/%7Etalmanl>