LaTeX multiple equation references in one

Question

Is it possible to combine multiple equation references into one, like it is for the \cite command? What I would like is the following:

\begin{subequations}  \begin{align}   a & = b \label{eq1} \\   c & = d \label{eq2}  \end{align} \end{subequations}  Some text referring to the formulas \eqref{eq1,eq2}. 

which would then compile as "Some text referring to the formulas (1a,b)." Obviously, this example doesn't work, but I'm hoping there's a package out there that does something similar. Any ideas?

Answer 1

This is a simple solution that requires no additional packages, just one additional label:

\begin{subequations}  \label{eq1}  \begin{align}   a & = b \label{eq11} \\   c & = d \label{eq12}  \end{align} \end{subequations} 

And when you do \eqref{eq1} it will display as (1).

Answer 2

You can use cleveref-package. Here's documentation.

You can then use \cref{eq2,eq1,eq3,eq5,thm2,def1} in order to do it.