## LaTeX forum ⇒ General ⇒ Two pagerefs that possibly refer to the same page Topic is solved

LaTeX specific issues not fitting into one of the other forums of this category.
Yfke
Posts: 4
Joined: Mon Aug 30, 2010 9:10 pm

### Two pagerefs that possibly refer to the same page

Hello,

In my document I have two labeled formulas that I want to refer to elsewhere using a pageref. Since my text is likely to change in the future, I do not know yet whether or not the formulas will be on the same page.

Ideally, I would want my pageref to be such that if they are both on the same page, the text would read:
"... the formulas on page 5 ..."
If the second formula falls onto the second page, I would like it to read:
"... the formulas on pages 5 and 6 ..."

Of course, it would look stupid if it read "... the formulas on pages 5 and 5 ..."

To provide a minimal working example of what I mean:
\documentclass{article}\begin{document}Two formula's: \label{f1} The first formula \label{f2} The second formula A lot of other text here. % code that facilitates the following:% The formulas on page(s) \pageref{f1} (and \pageref{f2}) ...\end{document}

Is there a way to achieve this? Thanks in advance!

Tags:

Namrod
Posts: 8
Joined: Fri Apr 26, 2013 9:10 pm
You can create your own command which compare the page of the 2 formulas. For example, using the ifthen package :

\newcommand{\pageeq}[2]{\ifthenelse{\pageref{#1}=\pageref{#2}}{page \pageref{#1}}{pages \pageref{#1} and \pageref{#2}}}

Thus with this code :

\documentclass{article} \usepackage[utf8]{inputenc}\usepackage[T1]{fontenc}\usepackage{ifthen} \newcommand{\pageeq}[2]{\ifthenelse{\pageref{#1}=\pageref{#2}}{page \pageref{#1}}{pages \pageref{#1} and \pageref{#2}}} \begin{document} \begin{equation}e=mc^2\label{eq1}\end{equation} \begin{equation}(a+b)^2=a^2+2ab+b^2\label{eq2}\end{equation} ... formulas \pageeq{eq1}{eq2} \end{document}

you will get ... formulas page 1

whereas this code :

\documentclass{article} \usepackage[utf8]{inputenc}\usepackage[T1]{fontenc}\usepackage{ifthen} \newcommand{\pageeq}[2]{\ifthenelse{\pageref{#1}=\pageref{#2}}{page \pageref{#1}}{pages \pageref{#1} and \pageref{#2}}} \begin{document} \begin{equation}e=mc^2\label{eq1}\end{equation}\newpage\begin{equation}(a+b)^2=a^2+2ab+b^2\label{eq2}\end{equation} ... formulas \pageeq{eq1}{eq2} \end{document}

will produce ... formulas pages 1 and 2

Yfke
Posts: 4
Joined: Mon Aug 30, 2010 9:10 pm
Thank you Namrod, this was exactly the solution I was looking for. I had never heard of the ifthen-package before, I'll definitely delve into it! It looks like it'll provide a whole lot of new LaTeX-possibilities