Definition df-can 6322

Description: Define the class of all Cantorian sets. These are so-called because Cantor's Theorem A~<℘A holds for these sets. (Contributed by Scott Fenton, 19-Apr-2021.)

Assertion

Ref	Expression
df-can	⊢ Can = {x ∣ ℘1x ≈ x}

Detailed syntax breakdown of Definition df-can

Step	Hyp	Ref	Expression
1		ccan 6321	. 2 class Can
2		vx	. . . . . 6 setvar x
3	2	cv 1641	. . . . 5 class x
4	3	cpw1 4135	. . . 4 class ℘1x
5		cen 6028	. . . 4 class ≈
6	4, 3, 5	wbr 4639	. . 3 wff ℘1x ≈ x
7	6, 2	cab 2339	. 2 class {x ∣ ℘1x ≈ x}
8	1, 7	wceq 1642	1 wff Can = {x ∣ ℘1x ≈ x}

This definition is referenced by:  elcan  6327