Originally posted by: sandeepsinghchauhan

How can I formulate this? D[ <a,b>] is given in data. S is decision variable.

forall(ain A, b in B:D[<a,b>]!=0){

S[<a,b>] >=D[<a,b>];

}

Hi

range A=1..2;
range B=1..3;

tuple t
{
int a;
int b;
}

 

{t} s={<a,b> | a in A,b in B};
 
int D[<a,b> in s]=a+b;
dvar int S[s];
 
subject to
{
 forall(a in A, b in B:D[<a,b>]!=0){

S[<a,b>] >=D[<a,b>];

}

}

works fine

regards

Originally posted by: sandeepsinghchauhan

Thanks Alex, If D = 0 then S =0. How to incorporate this?

Hi,

then you could add

forall(a in A, b in B:D[<a,b>]==0) S[<a,b>]==0;

regards