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Re: [Help-glpk] Semi-continous variables in GLPK
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From: |
Andrew Makhorin |
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Subject: |
Re: [Help-glpk] Semi-continous variables in GLPK |
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Date: |
Wed, 23 Jan 2008 21:11:11 +0300 |
> Can anyone tell me if there is any possibility using semi-continous
> variables in GLPK using MathProg as the modeling language.
Glpk does not support semi-continuous variables. However, you can model
them using binary variables.
> E. g. a variable "x" has to be either 5 < x < 10 or it has to be 0. Is
> it possible to do that using MathProg?
For example, this can be modeled as follows:
5 * z <= x <= 10 * z,
where z is a binary variable.