答案1
不要给数学加脚注。永远不要。但是,如果你不想听这个建议,这里有一种方法:
\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}