GAMS World Forum

Hello

I have defined the variables X(i,j,t) i=i1,..., I j=j1,...,J t=1,...,T

I would like to declare an SOS1 set containing variables X(i,j,t) , where only specific pairs of (i,j) are permissible.

For example valid SOS1 sets could be:
{X(i1,j1,t), X(i2,j1,t)}
{X(i1,j2,t), X(i2, j2,t), X(i5,j2,t)}
{X(i5,j3,t), X(i6, j3,t)}
...

So the rule is: set {x(i,j,t)} where (i,j) is permissible


Is it possible to define the SOS1 sets explicitely, like:

SOS1 VARIABLE
s1 : {X(i1,j1,t), X(i2,j1,t)} ;
s2 : {X(i1,j2,t), X(i2, j2,t), X(i5,j2,t)}
s3 : {X(i5,j3,t), X(i6, j3,t)}
;