footnotes
It makes the raised number but there's nothing below it.
Qbert\footnote{Observe the popularity of foreign names}
The packages I'm using are:
\documentclass[11pt,a4paper]{book}
\setcounter{secnumdepth}{4}
\usepackage{gb4e}
\usepackage{tipa}
\usepackage{setspace}
\usepackage[T1]{fontenc}
By default, revtex4-1 puts footnotes in the bibliography. This can be disabled with nofootinbib but prb puts them at the start of the bibliography anyway. So to get footnotes at the bottom of the page, you'd need:
\documentclass[reprint, nofootinbib]{revtex4-1}
\usepackage{scrextend}
\begin{document}
some text here.
\footnote{aaa}
\end{document}
Otherwise, you need to typeset your bibliography for the notes to show up:
\documentclass[reprint, prb]{revtex4-1}
\usepackage{scrextend}
\begin{document}
some text here.
\footnote{aaa}
\bibliography{apssamp}
\end{document}
You should never have a blank line before a display equation it creates an anomolous white line (not vertical space) that is not wanted above the display and is not discarded at a page break.
Although even without that the specified space does not allow a footnote on page 1. there are two problems, to make it fit you have to take a single line of the paragraph over a page, and normally LaTeX tries to avoid doing this (\widowpenalty) secondly as there is not enough stretch space on the page to make up for the difference in line heights.
If you make TeX prefer rather than avoid widow lines then it fits (I don't recommend doing this, but to demonstrate the effect)
\documentclass[12pt]{article}
\begin{document}
\widowpenalty-10000
Text text text text text text text text text text text text text
text text text text text text text text text text text text text
text text text\footnote{Footnote.}
\[x\]
Text text text text text text text text text text text
\[x\]
\vspace*{370pt}
Text text text text text text text text text text text text text
text text text text text text text text text text text text text
text text text text text text text text text text text text text
text text text text text text text text text text text text text
\begin{table}
\caption{Text}
\end{table}
\begin{table}
\caption{Text}
\end{table}
Text text text text text text text text text text text text text
text text text text text text text text text text text text text
\end{document}
Best Answer
Does not work (and similarly any other kind of box command) the footnote mark will appear but the footnote text will not escape the box. Use
so the footnote text is entered outside the box.
If you use multiple footnotes you also need to use the optional argument to foce the footnote texts to use the right number, variants of
depending on how many footnotes you have and how far you need to reset the counter.