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Theorem vtoclef 2626
 Description: Implicit substitution of a class for a setvar variable. (Contributed by NM, 18-Aug-1993.)
Hypotheses
Ref Expression
vtoclef.1
vtoclef.2
vtoclef.3
Assertion
Ref Expression
vtoclef
Distinct variable group:   ,
Allowed substitution hint:   ()

Proof of Theorem vtoclef
StepHypRef Expression
1 vtoclef.2 . . 3
21isseti 2563 . 2
3 vtoclef.1 . . 3
4 vtoclef.3 . . 3
53, 4exlimi 1485 . 2
62, 5ax-mp 7 1
 Colors of variables: wff set class Syntax hints:   wi 4   wceq 1243  wnf 1349  wex 1381   wcel 1393  cvv 2557 This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-5 1336  ax-gen 1338  ax-ie1 1382  ax-ie2 1383  ax-8 1395  ax-4 1400  ax-17 1419  ax-i9 1423  ax-ial 1427  ax-ext 2022 This theorem depends on definitions:  df-bi 110  df-nf 1350  df-sb 1646  df-clab 2027  df-cleq 2033  df-clel 2036  df-v 2559 This theorem is referenced by:  nn0ind-raph  8355
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