Originally posted by: Nodame

I am calling cplex from C# to solve an LP. I want to write a Linear constraint in Cplex that would achieve the following:

my variables should be multiples of a certain number, say 10 i.e. x modulo 10 = 0 for all my variables x.

I don't know if cplex has a modulo operator, and even if it does, I am not sure how to write this constraint in a linear form.

I would like to have the constraint x = 10 k , for some integer k

or something like "cplex.AddEq( cplex.Modulo(x, 10), 0 )" with this constraint being Linear.

Originally posted by: T_O

In a pure linear program, this is not possible. If it is ok to have a mixed-integer program, you could just create some integer variable k and some continous variable x. Then just use the constraint x = 10 k.

Best regards,
Thomas

Originally posted by: Nodame

Thanks, that works!