Dashes in Latex

         Subject: Re: dashes
         Date: Tue, 29 May 2001 08:57:27 -0700
         From: "Donal M. Ragan" 
         To: ramon.arrowsmith@asu.edu

For an ordinary hyphen use "-" (don't use the quotes).
For a range of numbers use the en dash "--" as in 2--8 (named because it
is as wide as n).
To indicate a parenthetic expression use the em dash "---" (as wide as m).

For the minus sign use $-100$ (that is, a hyphen in math mode).