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Theorem feq23i 5092
 Description: Equality inference for functions. (Contributed by Paul Chapman, 22-Jun-2011.)
Hypotheses
Ref Expression
feq23i.1
feq23i.2
Assertion
Ref Expression
feq23i

Proof of Theorem feq23i
StepHypRef Expression
1 feq23i.1 . 2
2 feq23i.2 . 2
3 feq23 5084 . 2
41, 2, 3mp2an 417 1
 Colors of variables: wff set class Syntax hints:   wb 103   wceq 1285  wf 4948 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-5 1377  ax-7 1378  ax-gen 1379  ax-ie1 1423  ax-ie2 1424  ax-8 1436  ax-11 1438  ax-4 1441  ax-17 1460  ax-i9 1464  ax-ial 1468  ax-i5r 1469  ax-ext 2065 This theorem depends on definitions:  df-bi 115  df-nf 1391  df-sb 1688  df-clab 2070  df-cleq 2076  df-clel 2079  df-in 2988  df-ss 2995  df-fn 4955  df-f 4956 This theorem is referenced by:  ftpg  5399
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