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Theorem fv2prc 6925
Description: A function value of a function value at a proper class is the empty set. (Contributed by AV, 8-Apr-2021.)
Assertion
Ref Expression
fv2prc 𝐴 ∈ V → ((𝐹𝐴)‘𝐵) = ∅)

Proof of Theorem fv2prc
StepHypRef Expression
1 fvprc 6875 . . 3 𝐴 ∈ V → (𝐹𝐴) = ∅)
21fveq1d 6885 . 2 𝐴 ∈ V → ((𝐹𝐴)‘𝐵) = (∅‘𝐵))
3 0fv 6924 . 2 (∅‘𝐵) = ∅
42, 3eqtrdi 2814 1 𝐴 ∈ V → ((𝐹𝐴)‘𝐵) = ∅)
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4   = wceq 1570  wcel 2143  Vcvv 3455  c0 4287  cfv 6538
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1825  ax-4 1839  ax-5 1940  ax-6 1997  ax-7 2038  ax-8 2145  ax-9 2153  ax-ext 2735  ax-nul 5270  ax-pr 5406
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1810  df-sb 2097  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2838  df-ne 2959  df-rab 3417  df-v 3457  df-dif 3909  df-un 3911  df-ss 3923  df-nul 4288  df-if 4489  df-sn 4591  df-pr 4593  df-op 4597  df-uni 4874  df-br 5111  df-dm 5673  df-iota 6494  df-fv 6546
This theorem is referenced by:  elfv2ex  6926  itunitc1  10405  indval0  12223  sralem  21278  srasca  21282  sravsca  21283  sraip  21284
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