Theorem recn

Description: A real number is a complex number. (Contributed by NM, 10-Aug-1999)

	Ref	Expression
Assertion	recn	⊢ ( 𝐴 ∈ ℝ → 𝐴 ∈ ℂ )

Proof

Step	Hyp	Ref	Expression
1		ax-resscn	⊢ ℝ ⊆ ℂ
2	1	sseli	⊢ ( 𝐴 ∈ ℝ → 𝐴 ∈ ℂ )