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Theorem elfv 5207
 Description: Membership in a function value. (Contributed by NM, 30-Apr-2004.)
Assertion
Ref Expression
elfv
Distinct variable groups:   ,   ,,   ,,
Allowed substitution hint:   ()

Proof of Theorem elfv
StepHypRef Expression
1 fv2 5204 . . 3
21eleq2i 2146 . 2
3 eluniab 3621 . 2
42, 3bitri 182 1
 Colors of variables: wff set class Syntax hints:   wa 102   wb 103  wal 1283  wex 1422   wcel 1434  cab 2068  cuni 3609   class class class wbr 3793  cfv 4932 This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-io 663  ax-5 1377  ax-7 1378  ax-gen 1379  ax-ie1 1423  ax-ie2 1424  ax-8 1436  ax-10 1437  ax-11 1438  ax-i12 1439  ax-bndl 1440  ax-4 1441  ax-17 1460  ax-i9 1464  ax-ial 1468  ax-i5r 1469  ax-ext 2064 This theorem depends on definitions:  df-bi 115  df-tru 1288  df-nf 1391  df-sb 1687  df-clab 2069  df-cleq 2075  df-clel 2078  df-nfc 2209  df-rex 2355  df-v 2604  df-sn 3412  df-uni 3610  df-iota 4897  df-fv 4940 This theorem is referenced by:  fv3  5229  relelfvdm  5237
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