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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 6867. (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 47582 | . . 3 ⊢ (𝐹 defAt 𝐴 ↔ (𝐴 ∈ dom 𝐹 ∧ Fun (𝐹 ↾ {𝐴}))) | |
| 2 | 1 | simplbi 496 | . 2 ⊢ (𝐹 defAt 𝐴 → 𝐴 ∈ dom 𝐹) |
| 3 | afvnfundmuv 47602 | . 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 1542 ∈ wcel 2114 Vcvv 3430 {csn 4568 dom cdm 5625 ↾ cres 5627 Fun wfun 6487 defAt wdfat 47579 '''cafv 47580 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5232 ax-nul 5242 ax-pr 5371 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-int 4891 df-br 5087 df-opab 5149 df-id 5520 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-res 5637 df-iota 6449 df-fun 6495 df-fv 6501 df-aiota 47548 df-dfat 47582 df-afv 47583 |
| This theorem is referenced by: afvvdm 47604 afvprc 47607 afvco2 47639 ndmaov 47646 aovprc 47651 |
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