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| Mirrors > Home > MPE Home > Th. List > Mathboxes > ndmafv | Structured version Visualization version GIF version | ||
| 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.) |
| Ref | Expression |
|---|---|
| ndmafv | ⊢ (¬ 𝐴 ∈ dom 𝐹 → (𝐹'''𝐴) = V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-dfat 47076 | . . 3 ⊢ (𝐹 defAt 𝐴 ↔ (𝐴 ∈ dom 𝐹 ∧ Fun (𝐹 ↾ {𝐴}))) | |
| 2 | 1 | simplbi 497 | . 2 ⊢ (𝐹 defAt 𝐴 → 𝐴 ∈ dom 𝐹) |
| 3 | afvnfundmuv 47096 | . 2 ⊢ (¬ 𝐹 defAt 𝐴 → (𝐹'''𝐴) = V) | |
| 4 | 2, 3 | nsyl5 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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