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Theorem grlimgredgex 48242
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 48241 . . 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 1391 . 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 6774 . . . . . . . . . . 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 29251 . . . . . . . . . . . . . . 15 (𝐺 ∈ USPGraph → 𝐺 ∈ UPGraph)
181, 17syl 17 . . . . . . . . . . . . . 14 (𝜑𝐺 ∈ UPGraph)
194, 5jca 511 . . . . . . . . . . . . . 14 (𝜑 → (𝐴𝑋𝐵𝑌))
2018, 19, 63jca 1128 . . . . . . . . . . . . 13 (𝜑 → (𝐺 ∈ UPGraph ∧ (𝐴𝑋𝐵𝑌) ∧ {𝐴, 𝐵} ∈ 𝐼))
21 eqid 2736 . . . . . . . . . . . . . 14 (Vtx‘𝐺) = (Vtx‘𝐺)
2221, 8upgrpredgv 29212 . . . . . . . . . . . . 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 48081 . . . . . . . . . . . 12 ((𝐵 ∈ (Vtx‘𝐺) ∧ 𝐴 ∈ (Vtx‘𝐺) ∧ {𝐴, 𝐵} ∈ 𝐼) → 𝐵 ∈ (𝐺 ClNeighbVtx 𝐴))
2824, 26, 6, 27syl3anc 1373 . . . . . . . . . . 11 (𝜑𝐵 ∈ (𝐺 ClNeighbVtx 𝐴))
2928adantr 480 . . . . . . . . . 10 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → 𝐵 ∈ (𝐺 ClNeighbVtx 𝐴))
3016, 29ffvelcdmd 7030 . . . . . . . . 9 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → (𝑓𝐵) ∈ (𝐻 ClNeighbVtx (𝐹𝐴)))
31 grlimgredgex.v . . . . . . . . . 10 𝑉 = (Vtx‘𝐻)
3231clnbgrisvtx 48072 . . . . . . . . 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 4691 . . . . . . . . 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 3959 . . . . . . . . . 10 (𝑥 = {(𝐹𝐴), (𝑓𝐵)} → (𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴)) ↔ {(𝐹𝐴), (𝑓𝐵)} ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))))
3938elrab 3646 . . . . . . . . 9 ({(𝐹𝐴), (𝑓𝐵)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))} ↔ ({(𝐹𝐴), (𝑓𝐵)} ∈ 𝐸 ∧ {(𝐹𝐴), (𝑓𝐵)} ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))))
4039simplbi 497 . . . . . . . 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 3578 . . . . . 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 48071 . . . . . . . . . . . 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 7030 . . . . . . . . 9 ((𝜑𝑓:(𝐺 ClNeighbVtx 𝐴)–1-1-onto→(𝐻 ClNeighbVtx (𝐹𝐴))) → (𝑓𝐴) ∈ (𝐻 ClNeighbVtx (𝐹𝐴)))
4831clnbgrisvtx 48072 . . . . . . . . 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 4691 . . . . . . . . 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 3959 . . . . . . . . . 10 (𝑥 = {(𝐹𝐴), (𝑓𝐴)} → (𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴)) ↔ {(𝐹𝐴), (𝑓𝐴)} ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))))
5554elrab 3646 . . . . . . . . 9 ({(𝐹𝐴), (𝑓𝐴)} ∈ {𝑥𝐸𝑥 ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))} ↔ ({(𝐹𝐴), (𝑓𝐴)} ∈ 𝐸 ∧ {(𝐹𝐴), (𝑓𝐴)} ⊆ (𝐻 ClNeighbVtx (𝐹𝐴))))
5655simplbi 497 . . . . . . . 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 3578 . . . . . 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 859 . . . 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 1934 . 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 847  w3a 1086   = wceq 1541  wex 1780  wcel 2113  wrex 3060  {crab 3399  wss 3901  {cpr 4582  wf 6488  1-1-ontowf1o 6491  cfv 6492  (class class class)co 7358  Vtxcvtx 29069  Edgcedg 29120  UPGraphcupgr 29153  USPGraphcuspgr 29221   ClNeighbVtx cclnbgr 48060   GraphLocIso cgrlim 48218
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-10 2146  ax-11 2162  ax-12 2184  ax-ext 2708  ax-sep 5241  ax-nul 5251  ax-pow 5310  ax-pr 5377  ax-un 7680  ax-cnex 11082  ax-resscn 11083  ax-1cn 11084  ax-icn 11085  ax-addcl 11086  ax-addrcl 11087  ax-mulcl 11088  ax-mulrcl 11089  ax-mulcom 11090  ax-addass 11091  ax-mulass 11092  ax-distr 11093  ax-i2m1 11094  ax-1ne0 11095  ax-1rid 11096  ax-rnegex 11097  ax-rrecex 11098  ax-cnre 11099  ax-pre-lttri 11100  ax-pre-lttrn 11101  ax-pre-ltadd 11102  ax-pre-mulgt0 11103
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  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 3061  df-reu 3351  df-rab 3400  df-v 3442  df-sbc 3741  df-csb 3850  df-dif 3904  df-un 3906  df-in 3908  df-ss 3918  df-pss 3921  df-nul 4286  df-if 4480  df-pw 4556  df-sn 4581  df-pr 4583  df-op 4587  df-uni 4864  df-int 4903  df-iun 4948  df-br 5099  df-opab 5161  df-mpt 5180  df-tr 5206  df-id 5519  df-eprel 5524  df-po 5532  df-so 5533  df-fr 5577  df-we 5579  df-xp 5630  df-rel 5631  df-cnv 5632  df-co 5633  df-dm 5634  df-rn 5635  df-res 5636  df-ima 5637  df-pred 6259  df-ord 6320  df-on 6321  df-lim 6322  df-suc 6323  df-iota 6448  df-fun 6494  df-fn 6495  df-f 6496  df-f1 6497  df-fo 6498  df-f1o 6499  df-fv 6500  df-riota 7315  df-ov 7361  df-oprab 7362  df-mpo 7363  df-om 7809  df-1st 7933  df-2nd 7934  df-frecs 8223  df-wrecs 8254  df-recs 8303  df-rdg 8341  df-1o 8397  df-2o 8398  df-oadd 8401  df-er 8635  df-map 8765  df-en 8884  df-dom 8885  df-sdom 8886  df-fin 8887  df-dju 9813  df-card 9851  df-pnf 11168  df-mnf 11169  df-xr 11170  df-ltxr 11171  df-le 11172  df-sub 11366  df-neg 11367  df-nn 12146  df-2 12208  df-n0 12402  df-xnn0 12475  df-z 12489  df-uz 12752  df-fz 13424  df-hash 14254  df-vtx 29071  df-iedg 29072  df-edg 29121  df-uhgr 29131  df-upgr 29155  df-uspgr 29223  df-nbgr 29406  df-clnbgr 48061  df-isubgr 48103  df-grim 48120  df-gric 48123  df-grlim 48220
This theorem is referenced by: (None)
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