## LaTeX forum ⇒ General ⇒ Footnotes next to Equation Number with Reference

LaTeX specific issues not fitting into one of the other forums of this category.
eschavez6
Posts: 2
Joined: Tue Jun 25, 2013 4:31 pm

### Footnotes next to Equation Number with Reference

Hi

I was trying to get a footnote next to an equation number and i found the following code will work.
\begin{equation}\refstepcounter{equation}x=y \tag{\theequation\footnotemark}\end{equation} \footnotetext{thefootnote}

But the problem I've been having is when i try to reference the equation with the footnote? How do you cite an equation when you add a footnote to the equation number?

I'm receiving an error when i try this code.
\begin{equation}\refstepcounter{equation}\label{eq1}x=y \tag{\theequation\footnotemark}\end{equation} \footnotetext{thefootnote}

i also tried this code and recieved another error
\begin{equation}\label{eq1}\refstepcounter{equation}x=y \tag{\theequation\footnotemark}\end{equation} \footnotetext{thefootnote}

without the label, I'm unable to reference the equation number in the document
Last edited by localghost on Tue Jun 25, 2013 5:10 pm, edited 1 time in total.

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cgnieder
Site Moderator
Posts: 1993
Joined: Sat Apr 16, 2011 7:27 pm
Hi eschavez6

Welcome to the LaTeX community. \footnotemark is fragile. Try putting a \protect in front of it:

\documentclass{article}\usepackage{amsmath}\begin{document}\begin{equation}\refstepcounter{equation}\label{eq1}   x=y \tag{\theequation\protect\footnotemark}\end{equation} \footnotetext{thefootnote}\end{document}

Regards
site moderator & package author

eschavez6
Posts: 2
Joined: Tue Jun 25, 2013 4:31 pm
That's great it worked

But when i reference the equation, each time it creates a new footnote symbol in the referenced equation number. The pdf looks like this:

As you can see in equation (2*)

x=y (2^)

--------
^thefootnote

is there a way to reference an equation with a footnote without there being ia footnote int he reference? I want the text to look like this:

As you can see in equation (2)

x=y (2*)

--------
*thefootnote