# Springer LNCS Template: Same footnote for two authors

To add footnotes to authors in the Springer LNCS template one should not use \footnote{}, but \thanks{}.

Source Code:

\author{Author 1\thanks{author footnote...}}


This results in the author looking like this:

And the footnote looking like this:

However, I would like to use the same footnote for two authors. My first try did not work:

\author{Author 1\thanks{author footnote...}
\and Author 2\thanks{author footnote...}}


This obviously creates another (second) footnote, just with the same text, looking like this:

How can I create one author footnote which is referred to by two different authors?

• Why not simply leave out the thanks for the first author and imply that the footnote concerns both authors? – Johannes_B Jan 11 '16 at 10:04
• no the best solution, imo... footnotes should be explicit and not implying something. – beta Jan 11 '16 at 10:06
• If you are using this template because you are submitting something to one of Elseiver's journal, just copy and paste two times the same \thanks command: it's their problem to adapt the layout, not yours. They might have special macros to handle this case, but could not spot it if you use a circumvent way not to duplicate this command. – Clément Jan 11 '16 at 14:41

In the lack of a MWE this is a quick and dirty solution using the article class …

\documentclass{article}

\newcommand{\repeatthanks}{\textsuperscript{\thefootnote}}

\begin{document}
\title{Title}
\author{Author1\thanks{Text}, Author2\repeatthanks}
\maketitle
\end{document}


It will only work if there’s no other \thanks in between.

The llncs class treats \thanks differently from the standard classes. But some tricks make the thing possible.

\documentclass[runningheads]{llncs}

\usepackage{etoolbox}

\usepackage{kantlipsum} % just for the example

\newcommand{\repthanks}[1]{\textsuperscript{\ref{#1}}}
\makeatletter
\patchcmd{\maketitle}
{\def\thanks}
{\let\repthanks\repthanksunskip\def\thanks}
{}{}
\patchcmd{\@maketitle}
{\def\thanks}
{\let\repthanks\@gobble\def\thanks}
{}{}
\newcommand\repthanksunskip[1]{\unskip{}}
\makeatother

\begin{document}

\title{LaTeX Template for Your LNCS Paper}

\author{Author 1\thanks{Supervised by Author 9\protect\label{X}}, Author 2\repthanks{X}}

\maketitle

\begin{abstract}
Abstract is here.
\end{abstract}

\section{Introduction}\label{sec:Introduction}

The rest goes here.

\kant

\end{document}


You need to do \protect\label{<whatever>} in the \thanks command you want to repeat and \repthanks{<whatever>} for repeating the footnote marker.

A similar adjustment could be made, if necessary, also for the \institute part.