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Theorem uniopel 4756
 Description: Ordered pair membership is inherited by class union. (Contributed by NM, 13-May-2008.) (Revised by Mario Carneiro, 26-Apr-2015.)
Hypotheses
Ref Expression
opthw.1
opthw.2
Assertion
Ref Expression
uniopel

Proof of Theorem uniopel
StepHypRef Expression
1 opthw.1 . . . 4
2 opthw.2 . . . 4
31, 2uniop 4755 . . 3
41, 2opi2 4720 . . 3
53, 4eqeltri 2541 . 2
6 elssuni 4279 . . 3
76sseld 3502 . 2
85, 7mpi 17 1
 Colors of variables: wff setvar class Syntax hints:  ->wi 4  e.wcel 1818   cvv 3109  {cpr 4031  <.cop 4035  U.cuni 4249 This theorem is referenced by:  dmrnssfld  5266  unielrel  5537 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1618  ax-4 1631  ax-5 1704  ax-6 1747  ax-7 1790  ax-9 1822  ax-10 1837  ax-11 1842  ax-12 1854  ax-13 1999  ax-ext 2435  ax-sep 4573  ax-nul 4581  ax-pr 4691 This theorem depends on definitions:  df-bi 185  df-or 370  df-an 371  df-3an 975  df-tru 1398  df-ex 1613  df-nf 1617  df-sb 1740  df-clab 2443  df-cleq 2449  df-clel 2452  df-nfc 2607  df-ne 2654  df-rex 2813  df-v 3111  df-dif 3478  df-un 3480  df-in 3482  df-ss 3489  df-nul 3785  df-if 3942  df-sn 4030  df-pr 4032  df-op 4036  df-uni 4250
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