Re: [Help-glpk] Conditions for glpsol

[Michael Hennebry]

On Thu, 24 May 2012, esma mehiaoui wrote:

> Could somebody tell me how to express the following condition in a linear 
> constraint ?
> if A = 1 and B = 1 then C = 1 
> if A = 1 and B = 0 then C = 0 
> if A = 0 and B = 1 then C = 0 
> if A = 0 and B = 0 then C = 0 
>
> Ps: just for precision it is not a logical AND the difference is that in my 
> case i should to have the value zero for C if A or B or both are equal to 0.

I'm not sure what distinction you are drawing here.
Supposing (A, B, C) has precisely four allowed values:
The convex hull is a simplex. It has four facets.
C>=0
C<=A
C<=B
C>=A+B-1

A, B integer

> All the best 
> Esma

This is where your PS would go.

--
Michael   address@hidden
"On Monday, I'm gonna have to tell my kindergarten class,
whom I teach not to run with scissors,
that my fiance ran me through with a broadsword."  --  Lily