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Theorem ndmafv 47097
Description: The value of a class outside its domain is the universe, compare with ndmfv 6907. (Contributed by Alexander van der Vekens, 25-May-2017.)
Assertion
Ref Expression
ndmafv 𝐴 ∈ dom 𝐹 → (𝐹'''𝐴) = V)

Proof of Theorem ndmafv
StepHypRef Expression
1 df-dfat 47076 . . 3 (𝐹 defAt 𝐴 ↔ (𝐴 ∈ dom 𝐹 ∧ Fun (𝐹 ↾ {𝐴})))
21simplbi 497 . 2 (𝐹 defAt 𝐴𝐴 ∈ dom 𝐹)
3 afvnfundmuv 47096 . 2 𝐹 defAt 𝐴 → (𝐹'''𝐴) = V)
42, 3nsyl5 159 1 𝐴 ∈ dom 𝐹 → (𝐹'''𝐴) = V)
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4   = wceq 1539  wcel 2107  Vcvv 3457  {csn 4599  dom cdm 5651  cres 5653  Fun wfun 6521   defAt wdfat 47073  '''cafv 47074
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1794  ax-4 1808  ax-5 1909  ax-6 1966  ax-7 2006  ax-8 2109  ax-9 2117  ax-10 2140  ax-11 2156  ax-12 2176  ax-ext 2706  ax-sep 5263  ax-nul 5273  ax-pr 5399
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1542  df-fal 1552  df-ex 1779  df-nf 1783  df-sb 2064  df-mo 2538  df-eu 2567  df-clab 2713  df-cleq 2726  df-clel 2808  df-nfc 2884  df-ne 2932  df-ral 3051  df-rex 3060  df-rab 3414  df-v 3459  df-sbc 3764  df-csb 3873  df-dif 3927  df-un 3929  df-in 3931  df-ss 3941  df-nul 4307  df-if 4499  df-sn 4600  df-pr 4602  df-op 4606  df-uni 4881  df-int 4920  df-br 5117  df-opab 5179  df-id 5545  df-xp 5657  df-rel 5658  df-cnv 5659  df-co 5660  df-dm 5661  df-res 5663  df-iota 6480  df-fun 6529  df-fv 6535  df-aiota 47042  df-dfat 47076  df-afv 47077
This theorem is referenced by:  afvvdm  47098  afvprc  47101  afvco2  47133  ndmaov  47140  aovprc  47145
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