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## Re: [Help-glpk] Conditions for glpsol

 From: Michael Hennebry Subject: Re: [Help-glpk] Conditions for glpsol Date: Thu, 24 May 2012 12:34:58 -0500 (CDT) User-agent: Alpine 1.00 (DEB 882 2007-12-20)

```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```

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