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Theorem exse2 7105
Description: Any set relation is set-like. (Contributed by Mario Carneiro, 22-Jun-2015.)
Assertion
Ref Expression
exse2  |-  ( R  e.  V  ->  R Se  A )

Proof of Theorem exse2
Dummy variables  x  y are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 df-rab 2921 . . . . 5  |-  { y  e.  A  |  y R x }  =  { y  |  ( y  e.  A  /\  y R x ) }
2 vex 3203 . . . . . . . 8  |-  y  e. 
_V
3 vex 3203 . . . . . . . 8  |-  x  e. 
_V
42, 3breldm 5329 . . . . . . 7  |-  ( y R x  ->  y  e.  dom  R )
54adantl 482 . . . . . 6  |-  ( ( y  e.  A  /\  y R x )  -> 
y  e.  dom  R
)
65abssi 3677 . . . . 5  |-  { y  |  ( y  e.  A  /\  y R x ) }  C_  dom  R
71, 6eqsstri 3635 . . . 4  |-  { y  e.  A  |  y R x }  C_  dom  R
8 dmexg 7097 . . . 4  |-  ( R  e.  V  ->  dom  R  e.  _V )
9 ssexg 4804 . . . 4  |-  ( ( { y  e.  A  |  y R x }  C_  dom  R  /\  dom  R  e.  _V )  ->  { y  e.  A  |  y R x }  e.  _V )
107, 8, 9sylancr 695 . . 3  |-  ( R  e.  V  ->  { y  e.  A  |  y R x }  e.  _V )
1110ralrimivw 2967 . 2  |-  ( R  e.  V  ->  A. x  e.  A  { y  e.  A  |  y R x }  e.  _V )
12 df-se 5074 . 2  |-  ( R Se  A  <->  A. x  e.  A  { y  e.  A  |  y R x }  e.  _V )
1311, 12sylibr 224 1  |-  ( R  e.  V  ->  R Se  A )
Colors of variables: wff setvar class
Syntax hints:    -> wi 4    /\ wa 384    e. wcel 1990   {cab 2608   A.wral 2912   {crab 2916   _Vcvv 3200    C_ wss 3574   class class class wbr 4653   Se wse 5071   dom cdm 5114
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-8 1992  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  ax-un 6949
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-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-uni 4437  df-br 4654  df-opab 4713  df-se 5074  df-cnv 5122  df-dm 5124  df-rn 5125
This theorem is referenced by:  dfac8clem  8855
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