Group: sci.op-research
From: "xgeneral57@gmail.com"
Date: Friday, March 21, 2008 3:13 PM
Subject: Counting zero continuous variables

I have a set of continuous variables x(i), i=1,.., N where x(i) can be
negative, zero or positive. I'm trying to count, in some way, how many
of x(i)'s are exactly zero. Is there any way to do so using linear
constraints?

XG