Metamath Proof Explorer


Theorem nncnd

Description: A positive integer is a complex number. (Contributed by Mario Carneiro, 27-May-2016)

Ref Expression
Hypothesis nnred.1 φ A
Assertion nncnd φ A

Proof

Step Hyp Ref Expression
1 nnred.1 φ A
2 nnsscn
3 2 1 sseldi φ A