\footnotemark ¶Synopsis, one of:
\footnotemark \footnotemark[number]
Put the current footnote mark in the text. To specify associated text
for the footnote see \footnotetext. The optional argument
number causes the command to use that number to determine the
footnote mark. This command can be used in inner paragraph mode
(see Modes).
If you use \footnotemark without the optional argument then it
increments the footnote counter, but if you use the optional
number then it does not. The next example produces several
consecutive footnote markers referring to the same footnote.
The first theorem\footnote{Due to Gauss.}
and the second theorem\footnotemark[\value{footnote}]
and the third theorem.\footnotemark[\value{footnote}]
If there are intervening footnotes then you must remember the value of
the number of the common mark. This example gives the same
institutional affiliation to both the first and third authors
(\thanks is a version of \footnote), by explicitly
specifying the number of the footnote (‘1’).
\title{A Treatise on the Binomial Theorem}
\author{J Moriarty\thanks{University of Leeds}
\and A C Doyle\thanks{Durham University}
\and S Holmes\footnotemark[1]}
\begin{document}
\maketitle
This example accomplishes the same by using the package cleveref.
\usepackage{cleveref}[2012/02/15] % in preamble
\crefformat{footnote}{#2\footnotemark[#1]#3}
...
The theorem is from Evers.\footnote{\label{fn:TE}Tinker, Evers, 1994.}
The corollary is from Chance.\footnote{Evers, Chance, 1990.}
But the key lemma is from Tinker.\cref{fn:TE}
It will work with the package hyperref.
This uses a counter to remember the footnote number. The third sentence is followed by the same footnote marker as the first.
\newcounter{footnoteValueSaver}
All babies are illogical.\footnote{%
Lewis Carroll.}\setcounter{footnoteValueSaver}{\value{footnote}}
Nobody is despised who can manage a crocodile.\footnote{%
Captain Hook.}
Illogical persons are despised.\footnotemark[\value{footnoteValueSaver}]
Therefore, anyone who can manage a crocodile is not a baby.