# Positive integers instead of integers ($\mathbb{Z}$) in assumption

I can use Integers to represent integers.

How to represent positive integers?

I can define MyAssumptions = Element[{x, y}, Integers] && x > 0 && y > 0.

But I want a more concise way because I need to define assumption for a lot of variables.

• vars = Array[x, 10]; Element[vars, Integers] && And @@ Thread[vars > 0] – Bob Hanlon Nov 22 '18 at 19:49