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Theorem sbcnel12g 3024
Description: Distribute proper substitution through negated membership. (Contributed by Andrew Salmon, 18-Jun-2011.)
Assertion
Ref Expression
sbcnel12g  |-  ( A  e.  V  ->  ( [. A  /  x ]. B  e/  C  <->  [_ A  /  x ]_ B  e/  [_ A  /  x ]_ C ) )

Proof of Theorem sbcnel12g
StepHypRef Expression
1 df-nel 2405 . . . 4  |-  ( B  e/  C  <->  -.  B  e.  C )
21sbcbii 2972 . . 3  |-  ( [. A  /  x ]. B  e/  C  <->  [. A  /  x ].  -.  B  e.  C
)
32a1i 9 . 2  |-  ( A  e.  V  ->  ( [. A  /  x ]. B  e/  C  <->  [. A  /  x ].  -.  B  e.  C ) )
4 sbcng 2953 . 2  |-  ( A  e.  V  ->  ( [. A  /  x ].  -.  B  e.  C  <->  -. 
[. A  /  x ]. B  e.  C
) )
5 sbcel12g 3022 . . . 4  |-  ( A  e.  V  ->  ( [. A  /  x ]. B  e.  C  <->  [_ A  /  x ]_ B  e.  [_ A  /  x ]_ C ) )
65notbid 657 . . 3  |-  ( A  e.  V  ->  ( -.  [. A  /  x ]. B  e.  C  <->  -. 
[_ A  /  x ]_ B  e.  [_ A  /  x ]_ C ) )
7 df-nel 2405 . . 3  |-  ( [_ A  /  x ]_ B  e/  [_ A  /  x ]_ C  <->  -.  [_ A  /  x ]_ B  e.  [_ A  /  x ]_ C
)
86, 7syl6bbr 197 . 2  |-  ( A  e.  V  ->  ( -.  [. A  /  x ]. B  e.  C  <->  [_ A  /  x ]_ B  e/  [_ A  /  x ]_ C ) )
93, 4, 83bitrd 213 1  |-  ( A  e.  V  ->  ( [. A  /  x ]. B  e/  C  <->  [_ A  /  x ]_ B  e/  [_ A  /  x ]_ C ) )
Colors of variables: wff set class
Syntax hints:   -. wn 3    -> wi 4    <-> wb 104    e. wcel 1481    e/ wnel 2404   [.wsbc 2913   [_csb 3007
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-in1 604  ax-in2 605  ax-io 699  ax-5 1424  ax-7 1425  ax-gen 1426  ax-ie1 1470  ax-ie2 1471  ax-8 1483  ax-10 1484  ax-11 1485  ax-i12 1486  ax-bndl 1487  ax-4 1488  ax-17 1507  ax-i9 1511  ax-ial 1515  ax-i5r 1516  ax-ext 2122
This theorem depends on definitions:  df-bi 116  df-tru 1335  df-fal 1338  df-nf 1438  df-sb 1737  df-clab 2127  df-cleq 2133  df-clel 2136  df-nfc 2271  df-nel 2405  df-v 2691  df-sbc 2914  df-csb 3008
This theorem is referenced by: (None)
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