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| Mirrors > Home > MPE Home > Th. List > 1vgrex | Structured version Visualization version GIF version | ||
| Description: A graph with at least one vertex is a set. (Contributed by AV, 2-Mar-2021.) |
| Ref | Expression |
|---|---|
| 1vgrex.v | ⊢ 𝑉 = (Vtx‘𝐺) |
| Ref | Expression |
|---|---|
| 1vgrex | ⊢ (𝑁 ∈ 𝑉 → 𝐺 ∈ V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elfvex 6912 | . 2 ⊢ (𝑁 ∈ (Vtx‘𝐺) → 𝐺 ∈ V) | |
| 2 | 1vgrex.v | . 2 ⊢ 𝑉 = (Vtx‘𝐺) | |
| 3 | 1, 2 | eleq2s 2879 | 1 ⊢ (𝑁 ∈ 𝑉 → 𝐺 ∈ V) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2145 Vcvv 3451 ‘cfv 6531 Vtxcvtx 29556 |
| 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-ext 2733 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-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-ne 2957 df-rab 3414 df-v 3453 df-dif 3902 df-un 3904 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-dm 5661 df-iota 6487 df-fv 6539 |
| This theorem is used by: upgr1e 29673 uspgr1e 29807 nbgrval 29899 cplgr1vlem 29992 vtxdgval 30031 vtxdgelxnn0 30035 wlkson 30217 trlsonfval 30270 pthsonfval 30308 spthson 30309 2wlkd 30507 is0wlk 30690 0wlkon 30693 is0trl 30696 0trlon 30697 0pthon 30700 0clwlkv 30704 1wlkd 30714 3wlkd 30753 wlkl0 30950 clnbgrval 48864 isgrtri 48985 |
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