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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 6898 | . 2 ⊢ (𝑁 ∈ (Vtx‘𝐺) → 𝐺 ∈ V) | |
| 2 | 1vgrex.v | . 2 ⊢ 𝑉 = (Vtx‘𝐺) | |
| 3 | 1, 2 | eleq2s 2847 | 1 ⊢ (𝑁 ∈ 𝑉 → 𝐺 ∈ V) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1540 ∈ wcel 2109 Vcvv 3450 ‘cfv 6513 Vtxcvtx 28929 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2702 ax-nul 5263 ax-pr 5389 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2534 df-eu 2563 df-clab 2709 df-cleq 2722 df-clel 2804 df-ral 3046 df-rex 3055 df-rab 3409 df-v 3452 df-dif 3919 df-un 3921 df-ss 3933 df-nul 4299 df-if 4491 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4874 df-br 5110 df-dm 5650 df-iota 6466 df-fv 6521 |
| This theorem is referenced by: upgr1e 29046 uspgr1e 29177 nbgrval 29269 cplgr1vlem 29362 vtxdgval 29402 vtxdgelxnn0 29406 wlkson 29590 trlsonfval 29640 pthsonfval 29676 spthson 29677 2wlkd 29872 is0wlk 30052 0wlkon 30055 is0trl 30058 0trlon 30059 0pthon 30062 0clwlkv 30066 1wlkd 30076 3wlkd 30105 wlkl0 30302 clnbgrval 47813 isgrtri 47932 |
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