Definition df-bj-ccinfty 38053

Description: Definition of the circle at infinity ℂ_∞. (Contributed by BJ, 22-Jun-2019.) The precise definition is irrelevant and should generally not be used. (New usage is discouraged.)

Assertion

Ref	Expression
df-bj-ccinfty	⊢ ℂ∞ = ran +∞ei

Detailed syntax breakdown of Definition df-bj-ccinfty

Step	Hyp	Ref	Expression
1		cccinfty 38052	. 2 class ℂ∞
2		cinftyexpi 38047	. . 3 class +∞ei
3	2	crn 5648	. 2 class ran +∞ei
4	1, 3	wceq 1570	1 wff ℂ∞ = ran +∞ei

This definition is used by:  bj-ccinftydisj  38054  bj-elccinfty  38055  bj-minftyccb  38066