Theorem bj-ccssccbar

Description: Complex numbers are extended complex numbers. (Contributed by BJ, 27-Jun-2019)

	Ref	Expression
Assertion	bj-ccssccbar	$$⊢ℂ\subseteq \overline{ℂ}$$

Proof

Step	Hyp	Ref	Expression
1		ssun1	$$⊢ℂ\subseteq ℂ\cup {ℂ}_{\infty }$$
2		df-bj-ccbar	$$⊢\overline{ℂ}=ℂ\cup {ℂ}_{\infty }$$
3	1 2	sseqtrri	$$⊢ℂ\subseteq \overline{ℂ}$$