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Theorem r19.42v 2765
Description: Restricted version of Theorem 19.42 of [Margaris] p. 90. (Contributed by NM, 27-May-1998.)
Assertion
Ref Expression
r19.42v
Distinct variable group:   ,
Allowed substitution hints:   ()   ()

Proof of Theorem r19.42v
StepHypRef Expression
1 r19.41v 2764 . 2
2 ancom 437 . . 3
32rexbii 2639 . 2
4 ancom 437 . 2
51, 3, 43bitr4i 268 1
Colors of variables: wff setvar class
Syntax hints:   wb 176   wa 358  wrex 2615
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1546  ax-5 1557  ax-17 1616  ax-9 1654  ax-8 1675  ax-6 1729  ax-11 1746
This theorem depends on definitions:  df-bi 177  df-an 360  df-tru 1319  df-ex 1542  df-nf 1545  df-rex 2620
This theorem is referenced by:  ceqsrexbv  2973  ceqsrex2v  2974  2reuswap  3038  2reu5  3044  iunrab  4013  iunin2  4030  iundif2  4033  addcass  4415  elxp2  4802  cnvuni  4895  f1oiso  5499
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