# [Tex/LaTex] Sub-/Superscripts in Headings/Normal Text

math-modesectioningsubscriptssuperscripts

Possible Duplicate:
How to typeset subscript in usual text mode?

I sometimes want to typeset something simple like $N_2$ or $3^2$ in a Heading, other times in a paragraph of normal text.
I want all of it to be typeset in the surrounding font.
In normal text this works quite good with $\textrm{N}^\textrm{2}$, even though it is too complicated.
For Headings I have to know how my headings are typeset (if they use sans, italic, bold, etc.)
And if I then use the appropriate command and later change my mind about heading formatting, I have to redo it.
Is there a command to somehow "step out" of math into whatever is the highermost level of current formatting?

So far I could only find answers like: use this package, or this command (that only solves a specialized case).
I am looking for a more general understanding of what's going on, does someone have a link at hand to a short summary to the fonts and their interaction in LaTeX?

#### Best Answer

Type your superscripts and subscripts using \textsuperscript and \textsubscript respectively. The former is defined in latex.ltx while the latter could be defined similarly:

\documentclass{article}
\makeatletter
% \textsubscript defined equivalent to \textsuperscript in latex.ltx
\DeclareRobustCommand*\textsubscript[1]{%
\@textsubscript{\selectfont#1}}
\def\@textsubscript#1{%
{\m@th\ensuremath{_{\mbox{\fontsize\sf@size\z@#1}}}}}
\makeatother
\begin{document}
\tableofcontents
\section{Section $N^2$ and $N_2$}
\section{Section N\textsuperscript{2} and N\textsubscript{2}}
\end{document}


fixltx2e also provides the above defintion by default. So, adding

\usepackage{fixltx2e}% http://ctan.org/pkg/fixltx2e


to your document preamble would allow you to use \textsubscript.