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Theorem grlimgredgex 48742
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 2763 . . . 4 (𝐺 ClNeighbVtx 𝐴) = (𝐺 ClNeighbVtx 𝐴)
8 grlimgredgex.i . . . 4 𝐼 = (Edg‘𝐺)
9 eqid 2763 . . . 4 {𝑥𝐼𝑥 ⊆ (𝐺 ClNeighbVtx 𝐴)} = {𝑥𝐼𝑥 ⊆ (𝐺 ClNeighbVtx 𝐴)}
10 eqid 2763 . . . 4 (𝐻 ClNeighbVtx (𝐹𝐴)) = (𝐻 ClNeighbVtx (𝐹𝐴))
11 grlimgredgex.e . . . 4 𝐸 = (Edg‘𝐻)
12 eqid 2763 . . . 4 {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))} = {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))}
137, 8, 9, 10, 11, 12grlimprclnbgrvtx 48741 . . 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 6822 . . . . . . . . . . 11 (𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴)) → 𝑓:(𝐺 ClNeighbVtx 𝐴)⟶(𝐻 ClNeighbVtx (𝐹𝐴)))
1615adantl 486 . . . . . . . . . 10 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → 𝑓:(𝐺 ClNeighbVtx 𝐴)⟶(𝐻 ClNeighbVtx (𝐹𝐴)))
17 uspgrupgr 29506 . . . . . . . . . . . . . . 15 (𝐺 ∈ USPGraph → 𝐺 ∈ UPGraph)
181, 17syl 18 . . . . . . . . . . . . . 14 (𝜑𝐺 ∈ UPGraph)
194, 5jca 520 . . . . . . . . . . . . . 14 (𝜑 → (𝐴𝑋𝐵𝑌))
2018, 19, 63jca 1146 . . . . . . . . . . . . 13 (𝜑 → (𝐺 ∈ UPGraph ∧ (𝐴𝑋𝐵𝑌) ∧ {𝐴, 𝐵} ∈ 𝐼))
21 eqid 2763 . . . . . . . . . . . . . 14 (Vtx‘𝐺) = (Vtx‘𝐺)
2221, 8upgrpredgv 29467 . . . . . . . . . . . . 13 ((𝐺 ∈ UPGraph ∧ (𝐴𝑋𝐵𝑌) ∧ {𝐴, 𝐵} ∈ 𝐼) → (𝐴 ∈ (Vtx‘𝐺) ∧ 𝐵 ∈ (Vtx‘𝐺)))
23 simpr 489 . . . . . . . . . . . . 13 ((𝐴 ∈ (Vtx‘𝐺) ∧ 𝐵 ∈ (Vtx‘𝐺)) → 𝐵 ∈ (Vtx‘𝐺))
2420, 22, 233syl 19 . . . . . . . . . . . 12 (𝜑𝐵 ∈ (Vtx‘𝐺))
25 simpl 487 . . . . . . . . . . . . 13 ((𝐴 ∈ (Vtx‘𝐺) ∧ 𝐵 ∈ (Vtx‘𝐺)) → 𝐴 ∈ (Vtx‘𝐺))
2620, 22, 253syl 19 . . . . . . . . . . . 12 (𝜑𝐴 ∈ (Vtx‘𝐺))
2721, 8predgclnbgrel 48581 . . . . . . . . . . . 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 485 . . . . . . . . . 10 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → 𝐵 ∈ (𝐺 ClNeighbVtx 𝐴))
3016, 29ffvelcdmd 7082 . . . . . . . . 9 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → (𝑓𝐵) ∈ (𝐻 ClNeighbVtx (𝐹𝐴)))
31 grlimgredgex.v . . . . . . . . . 10 𝑉 = (Vtx‘𝐻)
3231clnbgrisvtx 48572 . . . . . . . . 9 ((𝑓𝐵) ∈ (𝐻 ClNeighbVtx (𝐹𝐴)) → (𝑓𝐵) ∈ 𝑉)
3330, 32syl 18 . . . . . . . 8 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → (𝑓𝐵) ∈ 𝑉)
3433adantr 485 . . . . . . 7 (((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) ∧ {(𝐹𝐴), (𝑓𝐵)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))}) → (𝑓𝐵) ∈ 𝑉)
35 preq2 4701 . . . . . . . . 9 (𝑣 = (𝑓𝐵) → {(𝐹𝐴), 𝑣} = {(𝐹𝐴), (𝑓𝐵)})
3635eleq1d 2848 . . . . . . . 8 (𝑣 = (𝑓𝐵) → ({(𝐹𝐴), 𝑣} ∈ 𝐸 ↔ {(𝐹𝐴), (𝑓𝐵)} ∈ 𝐸))
3736adantl 486 . . . . . . 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 3963 . . . . . . . . . 10 (𝑥 = {(𝐹𝐴), (𝑓𝐵)} → (𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴)) ↔ {(𝐹𝐴), (𝑓𝐵)} ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))))
3938elrab 3651 . . . . . . . . 9 ({(𝐹𝐴), (𝑓𝐵)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))} ↔ ({(𝐹𝐴), (𝑓𝐵)} ∈ 𝐸 ∧ {(𝐹𝐴), (𝑓𝐵)} ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))))
4039simplbi 501 . . . . . . . 8 ({(𝐹𝐴), (𝑓𝐵)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))} → {(𝐹𝐴), (𝑓𝐵)} ∈ 𝐸)
4140adantl 486 . . . . . . 7 (((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) ∧ {(𝐹𝐴), (𝑓𝐵)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))}) → {(𝐹𝐴), (𝑓𝐵)} ∈ 𝐸)
4234, 37, 41rspcedvd 3584 . . . . . 6 (((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) ∧ {(𝐹𝐴), (𝑓𝐵)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))}) → ∃𝑣𝑉 {(𝐹𝐴), 𝑣} ∈ 𝐸)
4342ex 417 . . . . 5 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → ({(𝐹𝐴), (𝑓𝐵)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))} → ∃𝑣𝑉 {(𝐹𝐴), 𝑣} ∈ 𝐸))
4421clnbgrvtxel 48571 . . . . . . . . . . . 12 (𝐴 ∈ (Vtx‘𝐺) → 𝐴 ∈ (𝐺 ClNeighbVtx 𝐴))
4526, 44syl 18 . . . . . . . . . . 11 (𝜑𝐴 ∈ (𝐺 ClNeighbVtx 𝐴))
4645adantr 485 . . . . . . . . . 10 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → 𝐴 ∈ (𝐺 ClNeighbVtx 𝐴))
4716, 46ffvelcdmd 7082 . . . . . . . . 9 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → (𝑓𝐴) ∈ (𝐻 ClNeighbVtx (𝐹𝐴)))
4831clnbgrisvtx 48572 . . . . . . . . 9 ((𝑓𝐴) ∈ (𝐻 ClNeighbVtx (𝐹𝐴)) → (𝑓𝐴) ∈ 𝑉)
4947, 48syl 18 . . . . . . . 8 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → (𝑓𝐴) ∈ 𝑉)
5049adantr 485 . . . . . . 7 (((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) ∧ {(𝐹𝐴), (𝑓𝐴)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))}) → (𝑓𝐴) ∈ 𝑉)
51 preq2 4701 . . . . . . . . 9 (𝑣 = (𝑓𝐴) → {(𝐹𝐴), 𝑣} = {(𝐹𝐴), (𝑓𝐴)})
5251eleq1d 2848 . . . . . . . 8 (𝑣 = (𝑓𝐴) → ({(𝐹𝐴), 𝑣} ∈ 𝐸 ↔ {(𝐹𝐴), (𝑓𝐴)} ∈ 𝐸))
5352adantl 486 . . . . . . 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 3963 . . . . . . . . . 10 (𝑥 = {(𝐹𝐴), (𝑓𝐴)} → (𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴)) ↔ {(𝐹𝐴), (𝑓𝐴)} ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))))
5554elrab 3651 . . . . . . . . 9 ({(𝐹𝐴), (𝑓𝐴)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))} ↔ ({(𝐹𝐴), (𝑓𝐴)} ∈ 𝐸 ∧ {(𝐹𝐴), (𝑓𝐴)} ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))))
5655simplbi 501 . . . . . . . 8 ({(𝐹𝐴), (𝑓𝐴)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))} → {(𝐹𝐴), (𝑓𝐴)} ∈ 𝐸)
5756adantl 486 . . . . . . 7 (((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) ∧ {(𝐹𝐴), (𝑓𝐴)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))}) → {(𝐹𝐴), (𝑓𝐴)} ∈ 𝐸)
5850, 53, 57rspcedvd 3584 . . . . . 6 (((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) ∧ {(𝐹𝐴), (𝑓𝐴)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))}) → ∃𝑣𝑉 {(𝐹𝐴), 𝑣} ∈ 𝐸)
5958ex 417 . . . . 5 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → ({(𝐹𝐴), (𝑓𝐴)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))} → ∃𝑣𝑉 {(𝐹𝐴), 𝑣} ∈ 𝐸))
6043, 59jaod 872 . . . 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 458 . . 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 1963 . 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
Syntax hints:  wi 4  wb 209  wa 400  wo 860  w3a 1103   = wceq 1570  wex 1809  wcel 2143  wrex 3089  {crab 3416  wss 3906  {cpr 4592  wf 6534  1-1-ontowf1o 6537  cfv 6538  (class class class)co 7412  Vtxcvtx 29324  Edgcedg 29375  UPGraphcupgr 29408  USPGraphcuspgr 29476   ClNeighbVtx cclnbgr 48560   GraphLocIso cgrlim 48718
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1825  ax-4 1839  ax-5 1940  ax-6 1997  ax-7 2038  ax-8 2145  ax-9 2153  ax-10 2176  ax-11 2192  ax-12 2213  ax-ext 2735  ax-sep 5258  ax-nul 5270  ax-pow 5338  ax-pr 5406  ax-un 7734  ax-cnex 11157  ax-resscn 11158  ax-1cn 11159  ax-icn 11160  ax-addcl 11161  ax-addrcl 11162  ax-mulcl 11163  ax-mulrcl 11164  ax-mulcom 11165  ax-addass 11166  ax-mulass 11167  ax-distr 11168  ax-i2m1 11169  ax-1ne0 11170  ax-1rid 11171  ax-rnegex 11172  ax-rrecex 11173  ax-cnre 11174  ax-pre-lttri 11175  ax-pre-lttrn 11176  ax-pre-ltadd 11177  ax-pre-mulgt0 11178
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3or 1104  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1810  df-nf 1814  df-sb 2097  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2838  df-nfc 2912  df-ne 2959  df-nel 3065  df-ral 3080  df-rex 3090  df-reu 3370  df-rab 3417  df-v 3457  df-sbc 3746  df-csb 3855  df-dif 3909  df-un 3911  df-in 3913  df-ss 3923  df-pss 3926  df-nul 4288  df-if 4489  df-pw 4565  df-sn 4591  df-pr 4593  df-op 4597  df-uni 4874  df-int 4914  df-iun 4959  df-br 5111  df-opab 5175  df-mpt 5194  df-tr 5220  df-id 5558  df-eprel 5563  df-po 5571  df-so 5572  df-fr 5616  df-we 5618  df-xp 5669  df-rel 5670  df-cnv 5671  df-co 5672  df-dm 5673  df-rn 5674  df-res 5675  df-ima 5676  df-pred 6304  df-ord 6365  df-on 6366  df-lim 6367  df-suc 6368  df-iota 6494  df-fun 6540  df-fn 6541  df-f 6542  df-f1 6543  df-fo 6544  df-f1o 6545  df-fv 6546  df-riota 7369  df-ov 7415  df-oprab 7416  df-mpo 7417  df-om 7864  df-1st 7987  df-2nd 7988  df-frecs 8279  df-wrecs 8310  df-recs 8359  df-rdg 8398  df-1o 8454  df-2o 8455  df-oadd 8458  df-er 8695  df-map 8827  df-en 8945  df-dom 8946  df-sdom 8947  df-fin 8948  df-dju 9888  df-card 9926  df-pnf 11246  df-mnf 11247  df-xr 11248  df-ltxr 11249  df-le 11250  df-sub 11444  df-neg 11445  df-nn 12235  df-2 12304  df-n0 12506  df-xnn0 12579  df-z 12593  df-uz 12864  df-fz 13537  df-hash 14369  df-vtx 29326  df-iedg 29327  df-edg 29376  df-uhgr 29386  df-upgr 29410  df-uspgr 29478  df-nbgr 29661  df-clnbgr 48561  df-isubgr 48603  df-grim 48620  df-gric 48623  df-grlim 48720
This theorem is referenced by: (None)
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