Replacing binary variables by using positive variables

GAMS
1

Hello All,

I would like to perform in GAMS the following logical condition: Z(t)=0 if X(t)=0 and Z(t)=1 if X(t)>0, where X(t) is any positive number. The main problem is that due to the limitations of the student version of GAMS I have to define Z(t) as a positive variable rather than the binary one. Do you have any idea how to do that?

Thanks,

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2

Hello Dima,

Do I understand your question correct if I rephrase it to: “is it possible to reformulate a model with binary variables to one without binary variables?”
In that case, the answer is “no”.

Kind regards,
Henry Vermue

On Friday, February 15, 2013 8:29:06 PM UTC+1, Dima wrote:

Hello All,

I would like to perform in GAMS the following logical condition: Z(t)=0 if X(t)=0 and Z(t)=1 if X(t)>0, where X(t) is any positive number. The main problem is that due to the limitations of the student version of GAMS I have to define Z(t) as a positive variable rather than the binary one. Do you have any idea how to do that?

Thanks,

–
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