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Theorem grlimgredgex 48476
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 2736 . . . 4 (𝐺 ClNeighbVtx 𝐴) = (𝐺 ClNeighbVtx 𝐴)
8 grlimgredgex.i . . . 4 𝐼 = (Edg‘𝐺)
9 eqid 2736 . . . 4 {𝑥𝐼𝑥 ⊆ (𝐺 ClNeighbVtx 𝐴)} = {𝑥𝐼𝑥 ⊆ (𝐺 ClNeighbVtx 𝐴)}
10 eqid 2736 . . . 4 (𝐻 ClNeighbVtx (𝐹𝐴)) = (𝐻 ClNeighbVtx (𝐹𝐴))
11 grlimgredgex.e . . . 4 𝐸 = (Edg‘𝐻)
12 eqid 2736 . . . 4 {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))} = {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))}
137, 8, 9, 10, 11, 12grlimprclnbgrvtx 48475 . . 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 1392 . 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 6780 . . . . . . . . . . 11 (𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴)) → 𝑓:(𝐺 ClNeighbVtx 𝐴)⟶(𝐻 ClNeighbVtx (𝐹𝐴)))
1615adantl 481 . . . . . . . . . 10 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → 𝑓:(𝐺 ClNeighbVtx 𝐴)⟶(𝐻 ClNeighbVtx (𝐹𝐴)))
17 uspgrupgr 29247 . . . . . . . . . . . . . . 15 (𝐺 ∈ USPGraph → 𝐺 ∈ UPGraph)
181, 17syl 17 . . . . . . . . . . . . . 14 (𝜑𝐺 ∈ UPGraph)
194, 5jca 511 . . . . . . . . . . . . . 14 (𝜑 → (𝐴𝑋𝐵𝑌))
2018, 19, 63jca 1129 . . . . . . . . . . . . 13 (𝜑 → (𝐺 ∈ UPGraph ∧ (𝐴𝑋𝐵𝑌) ∧ {𝐴, 𝐵} ∈ 𝐼))
21 eqid 2736 . . . . . . . . . . . . . 14 (Vtx‘𝐺) = (Vtx‘𝐺)
2221, 8upgrpredgv 29208 . . . . . . . . . . . . 13 ((𝐺 ∈ UPGraph ∧ (𝐴𝑋𝐵𝑌) ∧ {𝐴, 𝐵} ∈ 𝐼) → (𝐴 ∈ (Vtx‘𝐺) ∧ 𝐵 ∈ (Vtx‘𝐺)))
23 simpr 484 . . . . . . . . . . . . 13 ((𝐴 ∈ (Vtx‘𝐺) ∧ 𝐵 ∈ (Vtx‘𝐺)) → 𝐵 ∈ (Vtx‘𝐺))
2420, 22, 233syl 18 . . . . . . . . . . . 12 (𝜑𝐵 ∈ (Vtx‘𝐺))
25 simpl 482 . . . . . . . . . . . . 13 ((𝐴 ∈ (Vtx‘𝐺) ∧ 𝐵 ∈ (Vtx‘𝐺)) → 𝐴 ∈ (Vtx‘𝐺))
2620, 22, 253syl 18 . . . . . . . . . . . 12 (𝜑𝐴 ∈ (Vtx‘𝐺))
2721, 8predgclnbgrel 48315 . . . . . . . . . . . 12 ((𝐵 ∈ (Vtx‘𝐺) ∧ 𝐴 ∈ (Vtx‘𝐺) ∧ {𝐴, 𝐵} ∈ 𝐼) → 𝐵 ∈ (𝐺 ClNeighbVtx 𝐴))
2824, 26, 6, 27syl3anc 1374 . . . . . . . . . . 11 (𝜑𝐵 ∈ (𝐺 ClNeighbVtx 𝐴))
2928adantr 480 . . . . . . . . . 10 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → 𝐵 ∈ (𝐺 ClNeighbVtx 𝐴))
3016, 29ffvelcdmd 7037 . . . . . . . . 9 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → (𝑓𝐵) ∈ (𝐻 ClNeighbVtx (𝐹𝐴)))
31 grlimgredgex.v . . . . . . . . . 10 𝑉 = (Vtx‘𝐻)
3231clnbgrisvtx 48306 . . . . . . . . 9 ((𝑓𝐵) ∈ (𝐻 ClNeighbVtx (𝐹𝐴)) → (𝑓𝐵) ∈ 𝑉)
3330, 32syl 17 . . . . . . . 8 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → (𝑓𝐵) ∈ 𝑉)
3433adantr 480 . . . . . . 7 (((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) ∧ {(𝐹𝐴), (𝑓𝐵)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))}) → (𝑓𝐵) ∈ 𝑉)
35 preq2 4678 . . . . . . . . 9 (𝑣 = (𝑓𝐵) → {(𝐹𝐴), 𝑣} = {(𝐹𝐴), (𝑓𝐵)})
3635eleq1d 2821 . . . . . . . 8 (𝑣 = (𝑓𝐵) → ({(𝐹𝐴), 𝑣} ∈ 𝐸 ↔ {(𝐹𝐴), (𝑓𝐵)} ∈ 𝐸))
3736adantl 481 . . . . . . 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 3947 . . . . . . . . . 10 (𝑥 = {(𝐹𝐴), (𝑓𝐵)} → (𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴)) ↔ {(𝐹𝐴), (𝑓𝐵)} ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))))
3938elrab 3634 . . . . . . . . 9 ({(𝐹𝐴), (𝑓𝐵)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))} ↔ ({(𝐹𝐴), (𝑓𝐵)} ∈ 𝐸 ∧ {(𝐹𝐴), (𝑓𝐵)} ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))))
4039simplbi 496 . . . . . . . 8 ({(𝐹𝐴), (𝑓𝐵)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))} → {(𝐹𝐴), (𝑓𝐵)} ∈ 𝐸)
4140adantl 481 . . . . . . 7 (((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) ∧ {(𝐹𝐴), (𝑓𝐵)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))}) → {(𝐹𝐴), (𝑓𝐵)} ∈ 𝐸)
4234, 37, 41rspcedvd 3566 . . . . . 6 (((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) ∧ {(𝐹𝐴), (𝑓𝐵)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))}) → ∃𝑣𝑉 {(𝐹𝐴), 𝑣} ∈ 𝐸)
4342ex 412 . . . . 5 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → ({(𝐹𝐴), (𝑓𝐵)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))} → ∃𝑣𝑉 {(𝐹𝐴), 𝑣} ∈ 𝐸))
4421clnbgrvtxel 48305 . . . . . . . . . . . 12 (𝐴 ∈ (Vtx‘𝐺) → 𝐴 ∈ (𝐺 ClNeighbVtx 𝐴))
4526, 44syl 17 . . . . . . . . . . 11 (𝜑𝐴 ∈ (𝐺 ClNeighbVtx 𝐴))
4645adantr 480 . . . . . . . . . 10 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → 𝐴 ∈ (𝐺 ClNeighbVtx 𝐴))
4716, 46ffvelcdmd 7037 . . . . . . . . 9 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → (𝑓𝐴) ∈ (𝐻 ClNeighbVtx (𝐹𝐴)))
4831clnbgrisvtx 48306 . . . . . . . . 9 ((𝑓𝐴) ∈ (𝐻 ClNeighbVtx (𝐹𝐴)) → (𝑓𝐴) ∈ 𝑉)
4947, 48syl 17 . . . . . . . 8 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → (𝑓𝐴) ∈ 𝑉)
5049adantr 480 . . . . . . 7 (((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) ∧ {(𝐹𝐴), (𝑓𝐴)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))}) → (𝑓𝐴) ∈ 𝑉)
51 preq2 4678 . . . . . . . . 9 (𝑣 = (𝑓𝐴) → {(𝐹𝐴), 𝑣} = {(𝐹𝐴), (𝑓𝐴)})
5251eleq1d 2821 . . . . . . . 8 (𝑣 = (𝑓𝐴) → ({(𝐹𝐴), 𝑣} ∈ 𝐸 ↔ {(𝐹𝐴), (𝑓𝐴)} ∈ 𝐸))
5352adantl 481 . . . . . . 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 3947 . . . . . . . . . 10 (𝑥 = {(𝐹𝐴), (𝑓𝐴)} → (𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴)) ↔ {(𝐹𝐴), (𝑓𝐴)} ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))))
5554elrab 3634 . . . . . . . . 9 ({(𝐹𝐴), (𝑓𝐴)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))} ↔ ({(𝐹𝐴), (𝑓𝐴)} ∈ 𝐸 ∧ {(𝐹𝐴), (𝑓𝐴)} ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))))
5655simplbi 496 . . . . . . . 8 ({(𝐹𝐴), (𝑓𝐴)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))} → {(𝐹𝐴), (𝑓𝐴)} ∈ 𝐸)
5756adantl 481 . . . . . . 7 (((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) ∧ {(𝐹𝐴), (𝑓𝐴)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))}) → {(𝐹𝐴), (𝑓𝐴)} ∈ 𝐸)
5850, 53, 57rspcedvd 3566 . . . . . 6 (((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) ∧ {(𝐹𝐴), (𝑓𝐴)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))}) → ∃𝑣𝑉 {(𝐹𝐴), 𝑣} ∈ 𝐸)
5958ex 412 . . . . 5 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → ({(𝐹𝐴), (𝑓𝐴)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))} → ∃𝑣𝑉 {(𝐹𝐴), 𝑣} ∈ 𝐸))
6043, 59jaod 860 . . . 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 453 . . 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 1935 . 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 15 1 (𝜑 → ∃𝑣𝑉 {(𝐹𝐴), 𝑣} ∈ 𝐸)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 206  wa 395  wo 848  w3a 1087   = wceq 1542  wex 1781  wcel 2114  wrex 3061  {crab 3389  wss 3889  {cpr 4569  wf 6494  1-1-ontowf1o 6497  cfv 6498  (class class class)co 7367  Vtxcvtx 29065  Edgcedg 29116  UPGraphcupgr 29149  USPGraphcuspgr 29217   ClNeighbVtx cclnbgr 48294   GraphLocIso cgrlim 48452
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-10 2147  ax-11 2163  ax-12 2185  ax-ext 2708  ax-sep 5231  ax-nul 5241  ax-pow 5307  ax-pr 5375  ax-un 7689  ax-cnex 11094  ax-resscn 11095  ax-1cn 11096  ax-icn 11097  ax-addcl 11098  ax-addrcl 11099  ax-mulcl 11100  ax-mulrcl 11101  ax-mulcom 11102  ax-addass 11103  ax-mulass 11104  ax-distr 11105  ax-i2m1 11106  ax-1ne0 11107  ax-1rid 11108  ax-rnegex 11109  ax-rrecex 11110  ax-cnre 11111  ax-pre-lttri 11112  ax-pre-lttrn 11113  ax-pre-ltadd 11114  ax-pre-mulgt0 11115
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3or 1088  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-nf 1786  df-sb 2069  df-mo 2539  df-eu 2569  df-clab 2715  df-cleq 2728  df-clel 2811  df-nfc 2885  df-ne 2933  df-nel 3037  df-ral 3052  df-rex 3062  df-reu 3343  df-rab 3390  df-v 3431  df-sbc 3729  df-csb 3838  df-dif 3892  df-un 3894  df-in 3896  df-ss 3906  df-pss 3909  df-nul 4274  df-if 4467  df-pw 4543  df-sn 4568  df-pr 4570  df-op 4574  df-uni 4851  df-int 4890  df-iun 4935  df-br 5086  df-opab 5148  df-mpt 5167  df-tr 5193  df-id 5526  df-eprel 5531  df-po 5539  df-so 5540  df-fr 5584  df-we 5586  df-xp 5637  df-rel 5638  df-cnv 5639  df-co 5640  df-dm 5641  df-rn 5642  df-res 5643  df-ima 5644  df-pred 6265  df-ord 6326  df-on 6327  df-lim 6328  df-suc 6329  df-iota 6454  df-fun 6500  df-fn 6501  df-f 6502  df-f1 6503  df-fo 6504  df-f1o 6505  df-fv 6506  df-riota 7324  df-ov 7370  df-oprab 7371  df-mpo 7372  df-om 7818  df-1st 7942  df-2nd 7943  df-frecs 8231  df-wrecs 8262  df-recs 8311  df-rdg 8349  df-1o 8405  df-2o 8406  df-oadd 8409  df-er 8643  df-map 8775  df-en 8894  df-dom 8895  df-sdom 8896  df-fin 8897  df-dju 9825  df-card 9863  df-pnf 11181  df-mnf 11182  df-xr 11183  df-ltxr 11184  df-le 11185  df-sub 11379  df-neg 11380  df-nn 12175  df-2 12244  df-n0 12438  df-xnn0 12511  df-z 12525  df-uz 12789  df-fz 13462  df-hash 14293  df-vtx 29067  df-iedg 29068  df-edg 29117  df-uhgr 29127  df-upgr 29151  df-uspgr 29219  df-nbgr 29402  df-clnbgr 48295  df-isubgr 48337  df-grim 48354  df-gric 48357  df-grlim 48454
This theorem is referenced by: (None)
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