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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 6920 | . 2 ⊢ (𝑁 ∈ (Vtx‘𝐺) → 𝐺 ∈ V) | |
| 2 | 1vgrex.v | . 2 ⊢ 𝑉 = (Vtx‘𝐺) | |
| 3 | 1, 2 | eleq2s 2878 | 1 ⊢ (𝑁 ∈ 𝑉 → 𝐺 ∈ V) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1569 ∈ wcel 2144 Vcvv 3450 ‘cfv 6538 Vtxcvtx 29579 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 ax-nul 5259 ax-pr 5390 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-ne 2956 df-rab 3413 df-v 3452 df-ss 3896 df-dif 4047 df-un 4151 df-nul 4279 df-if 4482 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-br 5103 df-dm 5660 df-iota 6494 df-fv 6546 |
| This theorem is used by: upgr1e 29696 uspgr1e 29830 nbgrval 29922 cplgr1vlem 30015 vtxdgval 30054 vtxdgelxnn0 30058 wlkson 30240 trlsonfval 30293 pthsonfval 30331 spthson 30332 2wlkd 30530 is0wlk 30713 0wlkon 30716 is0trl 30719 0trlon 30720 0pthon 30723 0clwlkv 30727 1wlkd 30737 3wlkd 30776 wlkl0 30973 clnbgrval 49013 isgrtri 49134 |
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