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Theorem feq2d 5215
Description: Equality deduction for functions. (Contributed by Paul Chapman, 22-Jun-2011.)
Hypothesis
Ref Expression
feq2d.1
Assertion
Ref Expression
feq2d

Proof of Theorem feq2d
StepHypRef Expression
1 feq2d.1 . 2
2 feq2 5211 . 2
31, 2syl 15 1
Colors of variables: wff setvar class
Syntax hints:   wi 4   wb 176   wceq 1642  wf 4777
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1546  ax-5 1557  ax-17 1616  ax-9 1654  ax-8 1675  ax-11 1746  ax-ext 2334
This theorem depends on definitions:  df-bi 177  df-an 360  df-ex 1542  df-cleq 2346  df-fn 4790  df-f 4791
This theorem is referenced by:  feq12d  5216  ffdm  5234  fsng  5433
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