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Theorem wlkmex 16116
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 16115 . 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 5725 1 (𝑊 ∈ (Walks‘𝐺) → 𝐺 ∈ V)
Colors of variables: wff set class
Syntax hints:  wi 4  if-wif 983  w3a 1002   = wceq 1395  wcel 2200  wral 2508  Vcvv 2800  wss 3198  {csn 3667  {cpr 3668  {copab 4147  dom cdm 4723  wf 5320  cfv 5324  (class class class)co 6013  0cc0 8022  1c1 8023   + caddc 8025  ...cfz 10233  ..^cfzo 10367  chash 11027  Word cword 11103  Vtxcvtx 15853  iEdgciedg 15854  Walkscwlks 16114
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-14 2203  ax-ext 2211  ax-sep 4205  ax-pow 4262  ax-pr 4297
This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ral 2513  df-rex 2514  df-rab 2517  df-v 2802  df-un 3202  df-in 3204  df-ss 3211  df-pw 3652  df-sn 3673  df-pr 3674  df-op 3676  df-uni 3892  df-br 4087  df-opab 4149  df-mpt 4150  df-id 4388  df-xp 4729  df-rel 4730  df-cnv 4731  df-co 4732  df-dm 4733  df-rn 4734  df-res 4735  df-ima 4736  df-iota 5284  df-fun 5326  df-fv 5332  df-wlks 16115
This theorem is referenced by:  wlkv  16123  wlkcompim  16149  wlkeq  16151
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