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Re: [Help-glpk] Can't use variable within abs()?

From: Andrew Makhorin
Subject: Re: [Help-glpk] Can't use variable within abs()?
Date: Tue, 28 Aug 2007 17:05:29 +0400

> Thank you for your help. I'm a beginner with linear programming and
> O.R.; could you point me to a reference where I can find more info
> on piecewise linearity and convex-ness with respect to
> re-formulating or fixing non-linear models? For example, would the
> Winston book on Operations Research have it?
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