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I have occasionally wanted to refer to a range of equations in my document. So far, I've been using Equations~\eqref{firstEquation}~--~\eqref{lastEquation}, which produces something like "Equations (5) - (12)". I recognize that this could make it harder to maintain the document if equations get shifted around, but I still prefer it to something like "Equations (5), (6), (7), (8), (9), (10), (11), and (12)".

Is there a standard or accepted way to refer to a range of equations like this? Or should I just keep doing whatever looks best to me?

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Check out the cleveref package. You can write: see \cref{aneq,anothereq,andanothereq,onemoreeq} and get "see equations (5)-(8) and (16)" – Lev Bishop May 24 '11 at 19:37
@Lev: This is impossible! (or a rather bad bug in \cref that outputs more references than you specify) ;-) Also: This should be an answer. – Caramdir May 24 '11 at 19:41
@Caramdir: feel free to write a proper answer. I don't have time now. – Lev Bishop May 24 '11 at 19:42
up vote 22 down vote accepted

The Chicago Manual of Style (15th Edition) says:

A range of equations is referred to by giving the first and last equation numbers, joined by an en dash: From equations (2)–(5) we obtain . . .

Also, The Manual of Scientific Style recommends to use the en-dash:

For separating numbers in order to indicate a range, use an en-dash...

To automate this process, you could use the cleveref package, which automatically sorts and compresses a range of references; this package aldo provides the \crefrange command (and variants) to easily refer to a range of labels. You can customize the way the ranges are to be typeset. A little example:











To get an en-dash instead of the word "to" you need to add


to the preamble of the document.

EDIT: updated the example with an example of \Crefrange, and added the recommendations from the style manuals.

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