In the discrete branches of mathematics and the computer sciences, it
will only take some seconds until you're faced with a set like
$\{1,\ldots,m\}$. Only some people write $1\ldotp\ldotp m$, or
$\{j:1\leq j\leq m\}$, and that journal you're submitting to might
want something else entirely. "1, 2, many" provides an interface that
makes changing from one to another a one-line change.
Current version available here: 0.3 (2005/05/09)
12many-0.3.tar.gz (373.7Kb)
Current version on CTAN: 0.3