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 
|- ( ph -> A e. NN )
Assertion nncnd 
|- ( ph -> A e. CC )

Proof

Step Hyp Ref Expression
1 nnred.1 
 |-  ( ph -> A e. NN )
2 nnsscn 
 |-  NN C_ CC
3 2 1 sseldi 
 |-  ( ph -> A e. CC )