Definition df-bj-infty 38120

Description: Definition of ∞, the point at infinity of the real or complex projective line. (Contributed by BJ, 27-Jun-2019.) The precise definition is irrelevant and should generally not be used. (New usage is discouraged.)

Assertion

Ref	Expression
df-bj-infty	⊢ ∞ = 𝒫 ∪ ℂ

Detailed syntax breakdown of Definition df-bj-infty

Step	Hyp	Ref	Expression
1		cinfty 38119	. 2 class ∞
2		cc 11179	. . . 4 class ℂ
3	2	cuni 4867	. . 3 class ∪ ℂ
4	3	cpw 4557	. 2 class 𝒫 ∪ ℂ
5	1, 4	wceq 1570	1 wff ∞ = 𝒫 ∪ ℂ

This definition is used by: (None)