How to add divisibility constraint in GNU mathprog

Question

I want to add a constraint that a variable should be divisible by a particular integer. I tried using mod operator but it cannot be used with variables:

s.t. c1 x1 mod 10 = 0

I get the following error:

operand preceding mod has invalid type

How to resolve it?

Erwin Kalvelagen · Accepted Answer · 2022-06-23 15:04:15Z

0

This is actually surprisingly easy.

Your constraint:

 x mod 10 = 0

is equivalent to

 x = 10 * n where n is an integer

So the recipe is: add an integer variable n and add the linear constraint:

 x = 10 * n

edited Jun 23, 2022 at 15:04

answered Jun 23, 2022 at 14:57

Erwin Kalvelagen

16.9k3 gold badges18 silver badges42 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

How to add divisibility constraint in GNU mathprog

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related