Users' Mathboxes Mathbox for Alexander van der Vekens < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >   Mathboxes  >  ndmafv Structured version   Visualization version   GIF version

Theorem ndmafv 43338
Description: The value of a class outside its domain is the universe, compare with ndmfv 6699. (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 43317 . . . 4 (𝐹 defAt 𝐴 ↔ (𝐴 ∈ dom 𝐹 ∧ Fun (𝐹 ↾ {𝐴})))
21simplbi 500 . . 3 (𝐹 defAt 𝐴𝐴 ∈ dom 𝐹)
32con3i 157 . 2 𝐴 ∈ dom 𝐹 → ¬ 𝐹 defAt 𝐴)
4 afvnfundmuv 43337 . 2 𝐹 defAt 𝐴 → (𝐹'''𝐴) = V)
53, 4syl 17 1 𝐴 ∈ dom 𝐹 → (𝐹'''𝐴) = V)
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4   = wceq 1533  wcel 2110  Vcvv 3494  {csn 4566  dom cdm 5554  cres 5556  Fun wfun 6348   defAt wdfat 43314  '''cafv 43315
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1907  ax-6 1966  ax-7 2011  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2157  ax-12 2173  ax-ext 2793  ax-sep 5202  ax-nul 5209  ax-pow 5265  ax-pr 5329
This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1536  df-fal 1546  df-ex 1777  df-nf 1781  df-sb 2066  df-mo 2618  df-eu 2650  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ne 3017  df-ral 3143  df-rex 3144  df-rab 3147  df-v 3496  df-sbc 3772  df-csb 3883  df-dif 3938  df-un 3940  df-in 3942  df-ss 3951  df-nul 4291  df-if 4467  df-sn 4567  df-pr 4569  df-op 4573  df-uni 4838  df-int 4876  df-br 5066  df-opab 5128  df-id 5459  df-xp 5560  df-rel 5561  df-cnv 5562  df-co 5563  df-dm 5564  df-res 5566  df-iota 6313  df-fun 6356  df-fv 6362  df-aiota 43284  df-dfat 43317  df-afv 43318
This theorem is referenced by:  afvvdm  43339  afvprc  43342  afvco2  43374  ndmaov  43381  aovprc  43386
  Copyright terms: Public domain W3C validator