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Theorem fneq2 4931
Description: Equality theorem for function predicate with domain. (Contributed by NM, 1-Aug-1994.)
Assertion
Ref Expression
fneq2  F  Fn  F  Fn

Proof of Theorem fneq2
StepHypRef Expression
1 eqeq2 2046 . . 3  dom  F  dom  F
21anbi2d 437 . 2  Fun  F  dom  F  Fun 
F  dom  F
3 df-fn 4848 . 2  F  Fn  Fun 
F  dom  F
4 df-fn 4848 . 2  F  Fn  Fun 
F  dom  F
52, 3, 43bitr4g 212 1  F  Fn  F  Fn
Colors of variables: wff set class
Syntax hints:   wi 4   wa 97   wb 98   wceq 1242   dom cdm 4288   Fun wfun 4839    Fn wfn 4840
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 1333  ax-gen 1335  ax-4 1397  ax-17 1416  ax-ext 2019
This theorem depends on definitions:  df-bi 110  df-cleq 2030  df-fn 4848
This theorem is referenced by:  fneq2d  4933  fneq2i  4937  feq2  4974  foeq2  5046  f1o00  5104  eqfnfv2  5209  tfr0  5878  tfrlemisucaccv  5880  tfrlemi1  5887  tfrlemi14d  5888  tfrexlem  5889  0fz1  8679
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