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Theorem wlkmex 16560
Description: If there are walks on a graph, the graph is a set. (Contributed by Jim Kingdon, 1-Feb-2026.)
Assertion
Ref Expression
wlkmex (𝑊 ∈ (Walks‘𝐺) → 𝐺 ∈ V)

Proof of Theorem wlkmex
Dummy variables 𝑓 𝑔 𝑘 𝑝 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 df-wlks 16559 . 2 Walks = (𝑔 ∈ V ↦ {⟨𝑓, 𝑝⟩ ∣ (𝑓 ∈ Word dom (iEdg‘𝑔) ∧ 𝑝:(0...(♯‘𝑓))⟶(Vtx‘𝑔) ∧ ∀𝑘 ∈ (0..^(♯‘𝑓))if-((𝑝𝑘) = (𝑝‘(𝑘 + 1)), ((iEdg‘𝑔)‘(𝑓𝑘)) = {(𝑝𝑘)}, {(𝑝𝑘), (𝑝‘(𝑘 + 1))} ⊆ ((iEdg‘𝑔)‘(𝑓𝑘))))})
21mptrcl 5788 1 (𝑊 ∈ (Walks‘𝐺) → 𝐺 ∈ V)
Colors of variables:    wff set class
This proof depends on syntax axioms:  wi 4  if-wif 990  w3a 1009   = wceq 1402  wcel 2209  wral 2528  Vcvv 2821  wss 3220  {csn 3709  {cpr 3710  {copab 4191  dom cdm 4774  wf 5373  cfv 5377  (class class class)co 6085  0cc0 8179  1c1 8180   + caddc 8182  ...cfz 10411  ..^cfzo 10549  chash 11214  Word cword 11304  Vtxcvtx 16253  iEdgciedg 16254  Walkscwlks 16558
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4249  ax-pow 4311  ax-pr 4346
This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533  df-rex 2534  df-rab 2537  df-v 2823  df-un 3224  df-in 3226  df-ss 3233  df-pw 3690  df-sn 3715  df-pr 3716  df-op 3718  df-uni 3936  df-br 4131  df-opab 4193  df-mpt 4194  df-id 4438  df-xp 4780  df-rel 4781  df-cnv 4782  df-co 4783  df-dm 4784  df-rn 4785  df-res 4786  df-ima 4787  df-iota 5337  df-fun 5379  df-fv 5385  df-wlks 16559
This theorem is used by:  wlkv  16567  wlkcompim  16593  wlkeq  16595
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