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Theorem opres 2580
Description: Ordered pair membership in a restriction when the first member belongs to the restricting class.
Hypothesis
Ref Expression
opres.1 |- B e. V
Assertion
Ref Expression
opres |- (A e. D -> (<.A, B>. e. (C |` D) <-> <.A, B>. e. C))

Proof of Theorem opres
StepHypRef Expression
1 opres.1 . . . . 5 |- B e. V
21opelres 2579 . . . 4 |- (<.A, B>. e. (C |` D) <-> (<.A, B>. e. C /\ A e. D))
32pm3.26bd 259 . . 3 |- (<.A, B>. e. (C |` D) -> <.A, B>. e. C)
43a1i 7 . 2 |- (A e. D -> (<.A, B>. e. (C |` D) -> <.A, B>. e. C))
52biimpr 134 . . . 4 |- ((<.A, B>. e. C /\ A e. D) -> <.A, B>. e. (C |` D))
65exp 291 . . 3 |- (<.A, B>. e. C -> (A e. D -> <.A, B>. e. (C |` D)))
76com12 13 . 2 |- (A e. D -> (<.A, B>. e. C -> <.A, B>. e. (C |` D)))
84, 7impbid 397 1 |- (A e. D -> (<.A, B>. e. (C |` D) <-> <.A, B>. e. C))
Colors of variables: wff set class
Syntax hints:   -> wi 2   <-> wb 127   /\ wa 196   e. wcel 1092  Vcvv 1348  <.cop 1810   |` cres 2412
This theorem is referenced by:  resieq 2581  2elresin 2733
This theorem was proved from axioms:  ax-1 3  ax-2 4  ax-3 5  ax-mp 6  ax-4 673  ax-5 674  ax-6 675  ax-7 676  ax-gen 677  ax-8 798  ax-9 799  ax-10 800  ax-11 801  ax-12 802  ax-13 804  ax-14 805  ax-16 922  ax-17 925  ax-ext 1074  ax-rep 1075  ax-pow 1077
This theorem depends on definitions:  df-bi 128  df-or 197  df-an 198  df-ex 679  df-sb 853  df-clab 1093  df-cleq 1097  df-clel 1099  df-v 1349  df-dif 1489  df-un 1490  df-in 1491  df-ss 1492  df-nul 1708  df-pw 1799  df-sn 1811  df-pr 1812  df-op 1815  df-opab 2098  df-xp 2424  df-res 2430
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