Originally posted by: MchelLeo

Hi Alex,

I have a constraint is SUM (k,n), could you help me how to write it?

Thanks,

Leo

Hi,

could

range K=1..5;
range N=1..3;

float c[i in N][k in K]=i*k;
float l=2.3;

dvar int X[N][K];
subject to
{
sum(k in K,i in N) c[i][k]*X[i][k]<=l;
}

help ?

regards

Originally posted by: MchelLeo

Hi Alex,

Why in this constraint, we don't use forall?

For example:

range K=1..5;
range N=1..3;

float c[i in N][k in K]=i*k;
{float} L=2.3;

dvar int X[N][K];
subject to
{

forall(l in L ){
sum(k in K,i in N) c[i][k]*X[i][k]<=l;

}
}

Right?

Thanks,

Leo

Yes but you should rather write

range K=1..5;
range N=1..3;

float c[i in N][k in K]=i*k;
{float} L={2.3};

dvar int X[N][K];
subject to
{

forall(l in L ){
sum(k in K,i in N) c[i][k]*X[i][k]<=l;

}
}

regards