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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 6807 | . 2 ⊢ (𝑁 ∈ (Vtx‘𝐺) → 𝐺 ∈ V) | |
2 | 1vgrex.v | . 2 ⊢ 𝑉 = (Vtx‘𝐺) | |
3 | 1, 2 | eleq2s 2857 | 1 ⊢ (𝑁 ∈ 𝑉 → 𝐺 ∈ V) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1539 ∈ wcel 2106 Vcvv 3432 ‘cfv 6433 Vtxcvtx 27366 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-nul 5230 ax-pr 5352 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-ral 3069 df-rex 3070 df-rab 3073 df-v 3434 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-nul 4257 df-if 4460 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-br 5075 df-dm 5599 df-iota 6391 df-fv 6441 |
This theorem is referenced by: upgr1e 27483 uspgr1e 27611 nbgrval 27703 cplgr1vlem 27796 vtxdgval 27835 vtxdgelxnn0 27839 wlkson 28024 trlsonfval 28074 pthsonfval 28108 spthson 28109 2wlkd 28301 is0wlk 28481 0wlkon 28484 is0trl 28487 0trlon 28488 0pthon 28491 0clwlkv 28495 1wlkd 28505 3wlkd 28534 wlkl0 28731 |
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