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Metamath Proof Explorer

Theorem zcn

Description: An integer is a complex number. (Contributed by NM, 9-May-2004)

Ref Expression
Assertion zcn 
|- ( N e. ZZ -> N e. CC )

Proof

Step Hyp Ref Expression
1 zre 
 |-  ( N e. ZZ -> N e. RR )
2 1 recnd 
 |-  ( N e. ZZ -> N e. CC )