Headers with subscripts

Question

Consider the following MWE:

\documentclass[11pt,a4paper]{book}
\usepackage[Conny]{fncychap}  %% I used Conny, but any style gives the same result
\usepackage{lipsum}
\begin{document}
\chapter{Analytical form for ${}^3K_{rs}$ and its trace}
\lipsum
\end{document}

In the headers the subscripts are automatically changed to capital letters: how do I avoid it?

Use \newcommand{\hidemath}{${}^3K_{rs}$} \chapter{Analytical form for \protect\hidemath{} and its trace}. — Werner, Jul 23 '14 at 16:07

score 2 · Accepted Answer · answered Jul 23 '14 at 16:07

The conversion to uppercase can be reverted to lower case with \lowercase:

\documentclass[11pt,a4paper]{book}
\usepackage[Conny]{fncychap}
\usepackage{lipsum}
\begin{document}
\chapter{Analytical form for ${}^3K_{\lowercase{rs}}$ and its trace}
\lipsum
\end{document}

Or a robust macro can be defined, that is not expanded by \MakeUppercase:

\documentclass[11pt,a4paper]{book}
\usepackage[Conny]{fncychap}
\usepackage{lipsum}
\DeclareRobustCommand*{\myK}{\ensuremath{^3K_{rs}}}
\begin{document}
\chapter{Analytical form for \myK\ and its trace}
\lipsum
\end{document}

Headers with subscripts

1 Answers1