Theorem epse 4327

Description: The epsilon relation is set-like on any class. (This is the origin of the term "set-like": a set-like relation "acts like" the epsilon relation of sets and their elements.) (Contributed by Mario Carneiro, 22-Jun-2015.)

Assertion

Ref	Expression
epse	|- _E Se A

Proof of Theorem epse

Dummy variables x y are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		epel 4277	. . . . . . 7 |- ( y _E x <-> y e. x )
2	1	bicomi 131	. . . . . 6 |- ( y e. x <-> y _E x )
3	2	abbi2i 2285	. . . . 5 |- x = { y | y _E x }
4		vex 2733	. . . . 5 |- x e. _V
5	3, 4	eqeltrri 2244	. . . 4 |- { y | y _E x } e. _V
6		rabssab 3235	. . . 4 |- { y e. A | y _E x } C_ { y | y _E x }
7	5, 6	ssexi 4127	. . 3 |- { y e. A | y _E x } e. _V
8	7	rgenw 2525	. 2 |- A. x e. A { y e. A | y _E x } e. _V
9		df-se 4318	. 2 |- ( _E Se A <-> A. x e. A { y e. A | y _E x } e. _V )
10	8, 9	mpbir 145	1 |- _E Se A

Syntax hints:   e. wcel 2141   {cab 2156   A.wral 2448   {crab 2452   _Vcvv 2730   class class class wbr 3989   _E cep 4272   Se wse 4314

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-14 2144  ax-ext 2152  ax-sep 4107  ax-pow 4160  ax-pr 4194

This theorem depends on definitions:  df-bi 116  df-3an 975  df-tru 1351  df-nf 1454  df-sb 1756  df-eu 2022  df-mo 2023  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ral 2453  df-rab 2457  df-v 2732  df-un 3125  df-in 3127  df-ss 3134  df-pw 3568  df-sn 3589  df-pr 3590  df-op 3592  df-br 3990  df-opab 4051  df-eprel 4274  df-se 4318

This theorem is referenced by: (None)