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	|- CCinfty = ran inftyexpi

Detailed syntax breakdown

Step	Hyp	Ref	Expression
0		cccinfty	|- CCinfty
1		cinftyexpi	|- inftyexpi
2	1	crn	|- ran inftyexpi
3	0 2	wceq	|- CCinfty = ran inftyexpi