Definition df-bj-ccinfty

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

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

Detailed syntax breakdown

Step	Hyp	Ref	Expression
0		cccinfty	⊢ ℂ∞
1		cinftyexpi	⊢ +∞ei
2	1	crn	⊢ ran +∞ei
3	0 2	wceq	⊢ ℂ∞ = ran +∞ei