# Multiple references with a single footnote

I am having some problems with referencing multiple parts of my text in a single footnote. I already have tried it all. The image is shos the part that I can´t do a reference. The original footnote is a little above

\documentclass{article}
\usepackage{cleveref}
\begin{document}
\begin{align*}
&\begin{alignedat}{1}
P\biggl[Z_{1-\alpha} > \frac{18 + \frac{10}{7} - \bar{x}}{\sigma}\biggl]
\end{alignedat}
=
\begin{alignedat}{1}
P\biggl[Z_{1-\alpha} > \frac{\cancel{18}+ \frac{10}{7} - \cancel{18}}{1.14455}\biggl]
\end{alignedat}
=
\\[1ex]
= \hspace{0.1cm}
&\begin{alignedat}{1}
P\biggl[Z_{1-\alpha} > \frac{\frac{10}{7}}{1.14455}\biggl]  =P\biggl[Z_{1-\alpha} > 1.248151\biggl]
\end{alignedat}
=
\\
\stackrel{\footnotemark}{\approx}\hspace{0.1cm}
&\begin{alignedat}{1}
0.106 = 10.6  \%
\end{alignedat}
\end{align*}
\footnotetext{\textbf{1 - }Valores determinados com base em aproximações a valores mais próximos na tabela de quantis da função de distribuição normal padrão.\label{note1}}
\begin{align*}
&\begin{alignedat}{1}
P\biggl[17< Dur < 20\biggl]
\end{alignedat}
=
\begin{alignedat}{1}
P\biggl[\frac{17 - \bar{x}}{\sigma}<\frac{Dur - \bar{x}}{\sigma} < \frac{20 - \bar{x}}{\sigma}\biggl]
\end{alignedat}
= \\[1ex]
=\hspace{0.1cm}
&\begin{alignedat}{1}
P\biggl[\frac{17 - \bar{x}}{\sigma}< Z_{1-\alpha}< \frac{20 - \bar{x}}{\sigma}\biggl]
\end{alignedat}
=
\begin{alignedat}{1}
P\biggl[\frac{17 - 18}{1.14455}< Z_{1-\alpha} < \frac{20 - 18}{1.14455}\biggl]
\end{alignedat}
=\\[1ex]
= \hspace{0.1cm}
&\begin{alignedat}{1}
P\biggl[-0.873706< Z_{1-\alpha} < 1.747412\biggl]
\end{alignedat}
= \\[1ex]
= \hspace{0.1cm}
&\begin{alignedat}{1}
1-\biggl(P\biggl[-0.873706< Z_{1-\alpha}\biggl] + P\biggl[1.747412>Z_{1-\alpha}\biggl]\biggl)
\end{alignedat}
=\\
=\hspace{0.1cm}
&\begin{alignedat}{1}
1- Z_{1-\alpha}(0.873706) - Z_{1-\alpha}(1.747412) \stackrel{{1}}{\approx} 1 - 0.192 - 0.0401
\end{alignedat}
=\\[1ex]
=\hspace{0.1cm}
&\begin{alignedat}{1}
0.7679 = 76.79\%
\end{alignedat}
\end{align*}
\end{document}


• I'm not sure I understand your question. Does this question and its answers help? Jun 4, 2020 at 0:05
• I want to reference that one that I´m pointing on the image to that one created above. Make those the same footnote Jun 4, 2020 at 0:08

This uses \footnotemark[\getrefnumber{note1}] (refcount package) to reproduce the formatting precisely. \text{\textsuperscript{\ref{note1}}} also works.

I also cleaned up the code a bit.

\documentclass{article}
\usepackage{refcount}
\usepackage{amsmath}
\usepackage{cleveref}

\def\cancel{}% could not find in any package

\begin{document}
\begin{align*}
&
P\biggl[Z_{1-\alpha} > \frac{18 + \frac{10}{7} - \bar{x}}{\sigma}\biggl]
=
P\biggl[Z_{1-\alpha} > \frac{\cancel{18}+ \frac{10}{7} - \cancel{18}}{1.14455}\biggl]
=
\\[1ex]
= \null
&
P\biggl[Z_{1-\alpha} > \frac{\frac{10}{7}}{1.14455}\biggl]  =P\biggl[Z_{1-\alpha} > 1.248151\biggl]
\\
\stackrel{\footnotemark}{\approx} \null&
0.106 = 10.6  \%
\end{align*}
\footnotetext{Valores determinados com base em aproximações a valores mais próximos na tabela de quantis da função de distribuição normal padrão.\label{note1}}
\begin{align*}
&
P\biggl[17< Dur < 20\biggl]
=
P\biggl[\frac{17 - \bar{x}}{\sigma}<\frac{Dur - \bar{x}}{\sigma} < \frac{20 - \bar{x}}{\sigma}\biggl]
= \\[1ex]
=\null
&
P\biggl[\frac{17 - \bar{x}}{\sigma}< Z_{1-\alpha}< \frac{20 - \bar{x}}{\sigma}\biggl]
=
P\biggl[\frac{17 - 18}{1.14455}< Z_{1-\alpha} < \frac{20 - 18}{1.14455}\biggl]
=\\[1ex]
= \null
&
P\biggl[-0.873706< Z_{1-\alpha} < 1.747412\biggl]
= \\[1ex]
=\null
&
1-\biggl(P\biggl[-0.873706< Z_{1-\alpha}\biggl] + P\biggl[1.747412>Z_{1-\alpha}\biggl]\biggl)
=\\
=\null
&
1- Z_{1-\alpha}(0.873706) - Z_{1-\alpha}(1.747412) \stackrel{\footnotemark[\getrefnumber{note1}]}{\approx} 1 - 0.192 - 0.0401
=\\[1ex]
=\null
&
0.7679 = 76.79\%
\end{align*}
\end{document}