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Theorem grlimgredgex 48806
Description: Local isomorphisms between simple pseudographs map an edge onto an edge with an endpoint being the image of one of the endpoints of the first edge under the local isomorphism. (Contributed by AV, 28-Dec-2025.)
Hypotheses
Ref Expression
grlimgredgex.i 𝐼 = (Edg‘𝐺)
grlimgredgex.e 𝐸 = (Edg‘𝐻)
grlimgredgex.v 𝑉 = (Vtx‘𝐻)
grlimgredgex.a (𝜑𝐴𝑋)
grlimgredgex.b (𝜑𝐵𝑌)
grlimgredgex.p (𝜑 → {𝐴, 𝐵} ∈ 𝐼)
grlimgredgex.g (𝜑𝐺 ∈ USPGraph)
grlimgredgex.h (𝜑𝐻 ∈ USPGraph)
grlimgredgex.f (𝜑𝐹 ∈ (𝐺 GraphLocIso 𝐻))
Assertion
Ref Expression
grlimgredgex (𝜑 → ∃𝑣𝑉 {(𝐹𝐴), 𝑣} ∈ 𝐸)
Distinct variable groups:   𝑣,𝐴   𝑣,𝐵   𝑣,𝐸   𝑣,𝐹   𝑣,𝐺   𝑣,𝐻   𝑣,𝑉   𝜑,𝑣
Allowed substitution hints:   𝐼(𝑣)   𝑋(𝑣)   𝑌(𝑣)

Proof of Theorem grlimgredgex
Dummy variables 𝑓 𝑥 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 grlimgredgex.g . . 3 (𝜑𝐺 ∈ USPGraph)
2 grlimgredgex.h . . 3 (𝜑𝐻 ∈ USPGraph)
3 grlimgredgex.f . . 3 (𝜑𝐹 ∈ (𝐺 GraphLocIso 𝐻))
4 grlimgredgex.a . . 3 (𝜑𝐴𝑋)
5 grlimgredgex.b . . 3 (𝜑𝐵𝑌)
6 grlimgredgex.p . . 3 (𝜑 → {𝐴, 𝐵} ∈ 𝐼)
7 eqid 2766 . . . 4 (𝐺 ClNeighbVtx 𝐴) = (𝐺 ClNeighbVtx 𝐴)
8 grlimgredgex.i . . . 4 𝐼 = (Edg‘𝐺)
9 eqid 2766 . . . 4 {𝑥𝐼𝑥 ⊆ (𝐺 ClNeighbVtx 𝐴)} = {𝑥𝐼𝑥 ⊆ (𝐺 ClNeighbVtx 𝐴)}
10 eqid 2766 . . . 4 (𝐻 ClNeighbVtx (𝐹𝐴)) = (𝐻 ClNeighbVtx (𝐹𝐴))
11 grlimgredgex.e . . . 4 𝐸 = (Edg‘𝐻)
12 eqid 2766 . . . 4 {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))} = {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))}
137, 8, 9, 10, 11, 12grlimprclnbgrvtx 48805 . . 3 (((𝐺 ∈ USPGraph ∧ 𝐻 ∈ USPGraph) ∧ 𝐹 ∈ (𝐺 GraphLocIso 𝐻) ∧ (𝐴𝑋𝐵𝑌 ∧ {𝐴, 𝐵} ∈ 𝐼)) → ∃𝑓(𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴)) ∧ ({(𝐹𝐴), (𝑓𝐵)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))} ∨ {(𝐹𝐴), (𝑓𝐴)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))})))
141, 2, 3, 4, 5, 6, 13syl213anc 1416 . 2 (𝜑 → ∃𝑓(𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴)) ∧ ({(𝐹𝐴), (𝑓𝐵)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))} ∨ {(𝐹𝐴), (𝑓𝐴)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))})))
15 f1of 6827 . . . . . . . . . . 11 (𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴)) → 𝑓:(𝐺 ClNeighbVtx 𝐴)⟶(𝐻 ClNeighbVtx (𝐹𝐴)))
1615adantl 487 . . . . . . . . . 10 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → 𝑓:(𝐺 ClNeighbVtx 𝐴)⟶(𝐻 ClNeighbVtx (𝐹𝐴)))
17 uspgrupgr 29565 . . . . . . . . . . . . . . 15 (𝐺 ∈ USPGraph → 𝐺 ∈ UPGraph)
181, 17syl 18 . . . . . . . . . . . . . 14 (𝜑𝐺 ∈ UPGraph)
194, 5jca 521 . . . . . . . . . . . . . 14 (𝜑 → (𝐴𝑋𝐵𝑌))
2018, 19, 63jca 1146 . . . . . . . . . . . . 13 (𝜑 → (𝐺 ∈ UPGraph ∧ (𝐴𝑋𝐵𝑌) ∧ {𝐴, 𝐵} ∈ 𝐼))
21 eqid 2766 . . . . . . . . . . . . . 14 (Vtx‘𝐺) = (Vtx‘𝐺)
2221, 8upgrpredgv 29526 . . . . . . . . . . . . 13 ((𝐺 ∈ UPGraph ∧ (𝐴𝑋𝐵𝑌) ∧ {𝐴, 𝐵} ∈ 𝐼) → (𝐴 ∈ (Vtx‘𝐺) ∧ 𝐵 ∈ (Vtx‘𝐺)))
23 simpr 490 . . . . . . . . . . . . 13 ((𝐴 ∈ (Vtx‘𝐺) ∧ 𝐵 ∈ (Vtx‘𝐺)) → 𝐵 ∈ (Vtx‘𝐺))
2420, 22, 233syl 19 . . . . . . . . . . . 12 (𝜑𝐵 ∈ (Vtx‘𝐺))
25 simpl 488 . . . . . . . . . . . . 13 ((𝐴 ∈ (Vtx‘𝐺) ∧ 𝐵 ∈ (Vtx‘𝐺)) → 𝐴 ∈ (Vtx‘𝐺))
2620, 22, 253syl 19 . . . . . . . . . . . 12 (𝜑𝐴 ∈ (Vtx‘𝐺))
2721, 8predgclnbgrel 48645 . . . . . . . . . . . 12 ((𝐵 ∈ (Vtx‘𝐺) ∧ 𝐴 ∈ (Vtx‘𝐺) ∧ {𝐴, 𝐵} ∈ 𝐼) → 𝐵 ∈ (𝐺 ClNeighbVtx 𝐴))
2824, 26, 6, 27syl3anc 1398 . . . . . . . . . . 11 (𝜑𝐵 ∈ (𝐺 ClNeighbVtx 𝐴))
2928adantr 486 . . . . . . . . . 10 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → 𝐵 ∈ (𝐺 ClNeighbVtx 𝐴))
3016, 29ffvelcdmd 7087 . . . . . . . . 9 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → (𝑓𝐵) ∈ (𝐻 ClNeighbVtx (𝐹𝐴)))
31 grlimgredgex.v . . . . . . . . . 10 𝑉 = (Vtx‘𝐻)
3231clnbgrisvtx 48636 . . . . . . . . 9 ((𝑓𝐵) ∈ (𝐻 ClNeighbVtx (𝐹𝐴)) → (𝑓𝐵) ∈ 𝑉)
3330, 32syl 18 . . . . . . . 8 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → (𝑓𝐵) ∈ 𝑉)
3433adantr 486 . . . . . . 7 (((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) ∧ {(𝐹𝐴), (𝑓𝐵)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))}) → (𝑓𝐵) ∈ 𝑉)
35 preq2 4705 . . . . . . . . 9 (𝑣 = (𝑓𝐵) → {(𝐹𝐴), 𝑣} = {(𝐹𝐴), (𝑓𝐵)})
3635eleq1d 2851 . . . . . . . 8 (𝑣 = (𝑓𝐵) → ({(𝐹𝐴), 𝑣} ∈ 𝐸 ↔ {(𝐹𝐴), (𝑓𝐵)} ∈ 𝐸))
3736adantl 487 . . . . . . 7 ((((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) ∧ {(𝐹𝐴), (𝑓𝐵)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))}) ∧ 𝑣 = (𝑓𝐵)) → ({(𝐹𝐴), 𝑣} ∈ 𝐸 ↔ {(𝐹𝐴), (𝑓𝐵)} ∈ 𝐸))
38 sseq1 3965 . . . . . . . . . 10 (𝑥 = {(𝐹𝐴), (𝑓𝐵)} → (𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴)) ↔ {(𝐹𝐴), (𝑓𝐵)} ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))))
3938elrab 3653 . . . . . . . . 9 ({(𝐹𝐴), (𝑓𝐵)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))} ↔ ({(𝐹𝐴), (𝑓𝐵)} ∈ 𝐸 ∧ {(𝐹𝐴), (𝑓𝐵)} ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))))
4039simplbi 502 . . . . . . . 8 ({(𝐹𝐴), (𝑓𝐵)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))} → {(𝐹𝐴), (𝑓𝐵)} ∈ 𝐸)
4140adantl 487 . . . . . . 7 (((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) ∧ {(𝐹𝐴), (𝑓𝐵)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))}) → {(𝐹𝐴), (𝑓𝐵)} ∈ 𝐸)
4234, 37, 41rspcedvd 3586 . . . . . 6 (((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) ∧ {(𝐹𝐴), (𝑓𝐵)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))}) → ∃𝑣𝑉 {(𝐹𝐴), 𝑣} ∈ 𝐸)
4342ex 418 . . . . 5 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → ({(𝐹𝐴), (𝑓𝐵)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))} → ∃𝑣𝑉 {(𝐹𝐴), 𝑣} ∈ 𝐸))
4421clnbgrvtxel 48635 . . . . . . . . . . . 12 (𝐴 ∈ (Vtx‘𝐺) → 𝐴 ∈ (𝐺 ClNeighbVtx 𝐴))
4526, 44syl 18 . . . . . . . . . . 11 (𝜑𝐴 ∈ (𝐺 ClNeighbVtx 𝐴))
4645adantr 486 . . . . . . . . . 10 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → 𝐴 ∈ (𝐺 ClNeighbVtx 𝐴))
4716, 46ffvelcdmd 7087 . . . . . . . . 9 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → (𝑓𝐴) ∈ (𝐻 ClNeighbVtx (𝐹𝐴)))
4831clnbgrisvtx 48636 . . . . . . . . 9 ((𝑓𝐴) ∈ (𝐻 ClNeighbVtx (𝐹𝐴)) → (𝑓𝐴) ∈ 𝑉)
4947, 48syl 18 . . . . . . . 8 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → (𝑓𝐴) ∈ 𝑉)
5049adantr 486 . . . . . . 7 (((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) ∧ {(𝐹𝐴), (𝑓𝐴)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))}) → (𝑓𝐴) ∈ 𝑉)
51 preq2 4705 . . . . . . . . 9 (𝑣 = (𝑓𝐴) → {(𝐹𝐴), 𝑣} = {(𝐹𝐴), (𝑓𝐴)})
5251eleq1d 2851 . . . . . . . 8 (𝑣 = (𝑓𝐴) → ({(𝐹𝐴), 𝑣} ∈ 𝐸 ↔ {(𝐹𝐴), (𝑓𝐴)} ∈ 𝐸))
5352adantl 487 . . . . . . 7 ((((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) ∧ {(𝐹𝐴), (𝑓𝐴)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))}) ∧ 𝑣 = (𝑓𝐴)) → ({(𝐹𝐴), 𝑣} ∈ 𝐸 ↔ {(𝐹𝐴), (𝑓𝐴)} ∈ 𝐸))
54 sseq1 3965 . . . . . . . . . 10 (𝑥 = {(𝐹𝐴), (𝑓𝐴)} → (𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴)) ↔ {(𝐹𝐴), (𝑓𝐴)} ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))))
5554elrab 3653 . . . . . . . . 9 ({(𝐹𝐴), (𝑓𝐴)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))} ↔ ({(𝐹𝐴), (𝑓𝐴)} ∈ 𝐸 ∧ {(𝐹𝐴), (𝑓𝐴)} ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))))
5655simplbi 502 . . . . . . . 8 ({(𝐹𝐴), (𝑓𝐴)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))} → {(𝐹𝐴), (𝑓𝐴)} ∈ 𝐸)
5756adantl 487 . . . . . . 7 (((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) ∧ {(𝐹𝐴), (𝑓𝐴)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))}) → {(𝐹𝐴), (𝑓𝐴)} ∈ 𝐸)
5850, 53, 57rspcedvd 3586 . . . . . 6 (((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) ∧ {(𝐹𝐴), (𝑓𝐴)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))}) → ∃𝑣𝑉 {(𝐹𝐴), 𝑣} ∈ 𝐸)
5958ex 418 . . . . 5 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → ({(𝐹𝐴), (𝑓𝐴)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))} → ∃𝑣𝑉 {(𝐹𝐴), 𝑣} ∈ 𝐸))
6043, 59jaod 873 . . . 4 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → (({(𝐹𝐴), (𝑓𝐵)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))} ∨ {(𝐹𝐴), (𝑓𝐴)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))}) → ∃𝑣𝑉 {(𝐹𝐴), 𝑣} ∈ 𝐸))
6160expimpd 459 . . 3 (𝜑 → ((𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴)) ∧ ({(𝐹𝐴), (𝑓𝐵)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))} ∨ {(𝐹𝐴), (𝑓𝐴)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))})) → ∃𝑣𝑉 {(𝐹𝐴), 𝑣} ∈ 𝐸))
6261exlimdv 1966 . 2 (𝜑 → (∃𝑓(𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴)) ∧ ({(𝐹𝐴), (𝑓𝐵)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))} ∨ {(𝐹𝐴), (𝑓𝐴)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))})) → ∃𝑣𝑉 {(𝐹𝐴), 𝑣} ∈ 𝐸))
6314, 62mpd 16 1 (𝜑 → ∃𝑣𝑉 {(𝐹𝐴), 𝑣} ∈ 𝐸)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  wi 4  wb 209  wa 401  wo 861  w3a 1103   = wceq 1570  wex 1812  wcel 2146  wrex 3092  {crab 3419  wss 3908  {cpr 4596  wf 6539  1-1-ontowf1o 6542  cfv 6543  (class class class)co 7423  Vtxcvtx 29383  Edgcedg 29434  UPGraphcupgr 29467  USPGraphcuspgr 29535   ClNeighbVtx cclnbgr 48624   GraphLocIso cgrlim 48782
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-10 2179  ax-11 2195  ax-12 2216  ax-ext 2738  ax-sep 5262  ax-nul 5274  ax-pow 5341  ax-pr 5409  ax-un 7745  ax-cnex 11174  ax-resscn 11175  ax-1cn 11176  ax-icn 11177  ax-addcl 11178  ax-addrcl 11179  ax-mulcl 11180  ax-mulrcl 11181  ax-mulcom 11182  ax-addass 11183  ax-mulass 11184  ax-distr 11185  ax-i2m1 11186  ax-1ne0 11187  ax-1rid 11188  ax-rnegex 11189  ax-rrecex 11190  ax-cnre 11191  ax-pre-lttri 11192  ax-pre-lttrn 11193  ax-pre-ltadd 11194  ax-pre-mulgt0 11195
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3or 1104  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2570  df-eu 2600  df-clab 2745  df-cleq 2758  df-clel 2841  df-nfc 2915  df-ne 2962  df-nel 3068  df-ral 3083  df-rex 3093  df-reu 3373  df-rab 3420  df-v 3460  df-sbc 3748  df-csb 3857  df-dif 3911  df-un 3913  df-in 3915  df-ss 3925  df-pss 3928  df-nul 4290  df-if 4493  df-pw 4569  df-sn 4595  df-pr 4597  df-op 4601  df-uni 4878  df-int 4918  df-iun 4963  df-br 5115  df-opab 5179  df-mpt 5198  df-tr 5224  df-id 5561  df-eprel 5566  df-po 5574  df-so 5575  df-fr 5619  df-we 5621  df-xp 5672  df-rel 5673  df-cnv 5674  df-co 5675  df-dm 5676  df-rn 5677  df-res 5678  df-ima 5679  df-pred 6309  df-ord 6370  df-on 6371  df-lim 6372  df-suc 6373  df-iota 6499  df-fun 6545  df-fn 6546  df-f 6547  df-f1 6548  df-fo 6549  df-f1o 6550  df-fv 6551  df-riota 7380  df-ov 7426  df-oprab 7427  df-mpo 7428  df-om 7872  df-1st 7995  df-2nd 7996  df-frecs 8287  df-wrecs 8318  df-recs 8367  df-rdg 8406  df-1o 8462  df-2o 8463  df-oadd 8466  df-er 8703  df-map 8835  df-en 8953  df-dom 8954  df-sdom 8955  df-fin 8956  df-dju 9906  df-card 9944  df-pnf 11263  df-mnf 11264  df-xr 11265  df-ltxr 11266  df-le 11267  df-sub 11461  df-neg 11462  df-nn 12252  df-2 12321  df-n0 12523  df-xnn0 12596  df-z 12610  df-uz 12881  df-fz 13554  df-hash 14387  df-vtx 29385  df-iedg 29386  df-edg 29435  df-uhgr 29445  df-upgr 29469  df-uspgr 29537  df-nbgr 29720  df-clnbgr 48625  df-isubgr 48667  df-grim 48684  df-gric 48687  df-grlim 48784
This theorem is used by: (None)
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