Metamath Proof Explorer


Theorem nnred

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

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

Proof

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