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 48209
Description: The value of a class outside its domain is the universe, compare with ndmfv 6917. (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 48188 . . 3 (𝐹 defAt 𝐴 ↔ (𝐴 ∈ dom 𝐹 ∧ Fun (𝐹 ↾ {𝐴})))
21simplbi 502 . 2 (𝐹 defAt 𝐴 → 𝐴 ∈ dom 𝐹)
3 afvnfundmuv 48208 . 2 (¬ 𝐹 defAt 𝐴 → (𝐹'''𝐴) = V)
42, 3nsyl5 160 1 (¬ 𝐴 ∈ dom 𝐹 → (𝐹'''𝐴) = V)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  ¬ wn 3   → wi 4   = wceq 1570   ∈ wcel 2145  Vcvv 3451  {csn 4584  dom cdm 5651   ↾ cres 5653  Fun wfun 6532   defAt wdfat 48185  '''cafv 48186
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2147  ax-9 2155  ax-10 2178  ax-11 2194  ax-12 2213  ax-ext 2733  ax-sep 5249  ax-nul 5260  ax-pr 5391
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2565  df-eu 2595  df-clab 2740  df-cleq 2753  df-clel 2836  df-nfc 2910  df-ne 2957  df-ral 3078  df-rex 3088  df-rab 3414  df-v 3453  df-sbc 3740  df-csb 3848  df-dif 3902  df-un 3904  df-in 3906  df-ss 3916  df-nul 4280  df-if 4483  df-sn 4585  df-pr 4587  df-op 4591  df-uni 4868  df-int 4908  df-br 5104  df-opab 5168  df-id 5546  df-xp 5657  df-rel 5658  df-cnv 5659  df-co 5660  df-dm 5661  df-res 5663  df-iota 6494  df-fun 6540  df-fv 6546  df-aiota 48154  df-dfat 48188  df-afv 48189
This theorem is used by:  afvvdm  48210  afvprc  48213  afvco2  48245  ndmaov  48252  aovprc  48257
  Copyright terms: Public domain W3C validator