# Footnote in math mode: how to use symbols instead of numbers?

In this and that post, it is explained how to put a footnote in math mode. The problem is that the number of footnotemark might be confused with exponents and viceversa: how can I use a symbol (say §, for example) instead?

Note I wish to use symbols only in math mode not in the rest of the text.

• It's very simple: never footnote formulas. ;-) – egreg Dec 30 '15 at 15:09

Don't footnote math. Never. However, if you don't want to listen to this advice, here's a way:

\documentclass{article}
\usepackage[papersize={8cm,6cm}]{geometry} % just to save space
\usepackage{bigfoot}

\DeclareNewFootnote[para]{math}[fnsymbol]
\MakeSortedPerPage{footnotemath}

\begin{document}

Some text with a footnote.\footnote{Some text in the footnote}
$a^n+b^n\ne c^n\,\footnotemarkmath$\footnotetextmath{I found a very smart proof of
this, but the footnote space doesn't contain it.}

\end{document}


• I see that you don't have @Christian Hupfer problem with numeration – mattiav27 Dec 30 '15 at 15:59
• @mattiav27: I see that you have a problem with giving proper feedback ;-) – user31729 Dec 30 '15 at 16:35
• @egreg If I choose to heed the advice not to footnote math what could be alternative solutions? – Hennadii Madan Feb 23 '17 at 13:29
• @HennadiiMadan You can footnote the preceding or the following text. The problem with footnote marks in formulas is that they make them ambiguous. – egreg Feb 23 '17 at 13:31