Theorem dfse2 5499

Description: Alternate definition of set-like relation. (Contributed by Mario Carneiro, 23-Jun-2015.)

Assertion

Ref	Expression
dfse2	|- ( R Se A <-> A. x e. A ( A i^i ( `' R " { x } ) ) e. _V )

Distinct variable groups:   x, A   x, R

Proof of Theorem dfse2

Dummy variable y is distinct from all other variables.

Step	Hyp	Ref	Expression
1		df-se 5074	. 2 |- ( R Se A <-> A. x e. A { y e. A | y R x } e. _V )
2		dfrab3 3902	. . . . 5 |- { y e. A | y R x } = ( A i^i { y | y R x } )
3		vex 3203	. . . . . . 7 |- x e. _V
4		iniseg 5496	. . . . . . 7 |- ( x e. _V -> ( `' R " { x } ) = { y | y R x } )
5	3, 4	ax-mp 5	. . . . . 6 |- ( `' R " { x } ) = { y | y R x }
6	5	ineq2i 3811	. . . . 5 |- ( A i^i ( `' R " { x } ) ) = ( A i^i { y | y R x } )
7	2, 6	eqtr4i 2647	. . . 4 |- { y e. A | y R x } = ( A i^i ( `' R " { x } ) )
8	7	eleq1i 2692	. . 3 |- ( { y e. A | y R x } e. _V <-> ( A i^i ( `' R " { x } ) ) e. _V )
9	8	ralbii 2980	. 2 |- ( A. x e. A { y e. A | y R x } e. _V <-> A. x e. A ( A i^i ( `' R " { x } ) ) e. _V )
10	1, 9	bitri 264	1 |- ( R Se A <-> A. x e. A ( A i^i ( `' R " { x } ) ) e. _V )

Syntax hints:   <-> wb 196   = wceq 1483   e. wcel 1990   {cab 2608   A.wral 2912   {crab 2916   _Vcvv 3200   i^i cin 3573   {csn 4177   class class class wbr 4653   Se wse 5071   `'ccnv 5113   "cima 5117

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-sep 4781  ax-nul 4789  ax-pr 4906

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ral 2917  df-rex 2918  df-rab 2921  df-v 3202  df-sbc 3436  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-sn 4178  df-pr 4180  df-op 4184  df-br 4654  df-opab 4713  df-se 5074  df-xp 5120  df-cnv 5122  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127

This theorem is referenced by:  isoselem  6591  fnse  7294