MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  1vgrex Structured version   Visualization version   GIF version

Theorem 1vgrex 29389
Description: A graph with at least one vertex is a set. (Contributed by AV, 2-Mar-2021.)
Hypothesis
Ref Expression
1vgrex.v 𝑉 = (Vtx‘𝐺)
Assertion
Ref Expression
1vgrex (𝑁𝑉𝐺 ∈ V)

Proof of Theorem 1vgrex
StepHypRef Expression
1 elfvex 6923 . 2 (𝑁 ∈ (Vtx‘𝐺) → 𝐺 ∈ V)
2 1vgrex.v . 2 𝑉 = (Vtx‘𝐺)
31, 2eleq2s 2884 1 (𝑁𝑉𝐺 ∈ V)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  wi 4   = wceq 1570  wcel 2146  Vcvv 3458  cfv 6543  Vtxcvtx 29383
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 2148  ax-9 2156  ax-ext 2738  ax-nul 5274  ax-pr 5409
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 2570  df-eu 2600  df-clab 2745  df-cleq 2758  df-clel 2841  df-ne 2962  df-rab 3420  df-v 3460  df-dif 3911  df-un 3913  df-ss 3925  df-nul 4290  df-if 4493  df-sn 4595  df-pr 4597  df-op 4601  df-uni 4878  df-br 5115  df-dm 5676  df-iota 6499  df-fv 6551
This theorem is used by:  upgr1e  29500  uspgr1e  29631  nbgrval  29723  cplgr1vlem  29816  vtxdgval  29855  vtxdgelxnn0  29859  wlkson  30041  trlsonfval  30090  pthsonfval  30126  spthson  30127  2wlkd  30322  is0wlk  30505  0wlkon  30508  is0trl  30511  0trlon  30512  0pthon  30515  0clwlkv  30519  1wlkd  30529  3wlkd  30558  wlkl0  30755  clnbgrval  48628  isgrtri  48749
  Copyright terms: Public domain W3C validator