Definition df-bj-ccbar 37893

Description: Definition of the set of extended complex numbers ℂ̅. (Contributed by BJ, 22-Jun-2019.)

Assertion

Ref	Expression
df-bj-ccbar	⊢ ℂ̅ = (ℂ ∪ ℂ∞)

Detailed syntax breakdown of Definition df-bj-ccbar

Step	Hyp	Ref	Expression
1		cccbar 37892	. 2 class ℂ̅
2		cc 11116	. . 3 class ℂ
3		cccinfty 37888	. . 3 class ℂ∞
4	2, 3	cun 3906	. 2 class (ℂ ∪ ℂ∞)
5	1, 4	wceq 1570	1 wff ℂ̅ = (ℂ ∪ ℂ∞)

This definition is used by:  bj-ccssccbar  37894  bj-ccinftyssccbar  37895