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Mirrors > Home > MPE Home > Th. List > pliguhgr | Structured version Visualization version GIF version |
Description: Any planar incidence geometry 𝐺 can be regarded as a hypergraph with its points as vertices and its lines as edges. See incistruhgr 29111 for a generalization of this case for arbitrary incidence structures (planar incidence geometries are such incidence structures). (Proposed by Gerard Lang, 24-Nov-2021.) (Contributed by AV, 28-Nov-2021.) |
Ref | Expression |
---|---|
pliguhgr | ⊢ (𝐺 ∈ Plig → 〈∪ 𝐺, ( I ↾ 𝐺)〉 ∈ UHGraph) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | f1oi 6887 | . . . 4 ⊢ ( I ↾ 𝐺):𝐺–1-1-onto→𝐺 | |
2 | f1of 6849 | . . . 4 ⊢ (( I ↾ 𝐺):𝐺–1-1-onto→𝐺 → ( I ↾ 𝐺):𝐺⟶𝐺) | |
3 | pwuni 4950 | . . . . . . 7 ⊢ 𝐺 ⊆ 𝒫 ∪ 𝐺 | |
4 | n0lplig 30512 | . . . . . . . . . 10 ⊢ (𝐺 ∈ Plig → ¬ ∅ ∈ 𝐺) | |
5 | 4 | adantr 480 | . . . . . . . . 9 ⊢ ((𝐺 ∈ Plig ∧ 𝐺 ⊆ 𝒫 ∪ 𝐺) → ¬ ∅ ∈ 𝐺) |
6 | disjsn 4716 | . . . . . . . . 9 ⊢ ((𝐺 ∩ {∅}) = ∅ ↔ ¬ ∅ ∈ 𝐺) | |
7 | 5, 6 | sylibr 234 | . . . . . . . 8 ⊢ ((𝐺 ∈ Plig ∧ 𝐺 ⊆ 𝒫 ∪ 𝐺) → (𝐺 ∩ {∅}) = ∅) |
8 | reldisj 4459 | . . . . . . . . 9 ⊢ (𝐺 ⊆ 𝒫 ∪ 𝐺 → ((𝐺 ∩ {∅}) = ∅ ↔ 𝐺 ⊆ (𝒫 ∪ 𝐺 ∖ {∅}))) | |
9 | 8 | adantl 481 | . . . . . . . 8 ⊢ ((𝐺 ∈ Plig ∧ 𝐺 ⊆ 𝒫 ∪ 𝐺) → ((𝐺 ∩ {∅}) = ∅ ↔ 𝐺 ⊆ (𝒫 ∪ 𝐺 ∖ {∅}))) |
10 | 7, 9 | mpbid 232 | . . . . . . 7 ⊢ ((𝐺 ∈ Plig ∧ 𝐺 ⊆ 𝒫 ∪ 𝐺) → 𝐺 ⊆ (𝒫 ∪ 𝐺 ∖ {∅})) |
11 | 3, 10 | mpan2 691 | . . . . . 6 ⊢ (𝐺 ∈ Plig → 𝐺 ⊆ (𝒫 ∪ 𝐺 ∖ {∅})) |
12 | fss 6753 | . . . . . 6 ⊢ ((( I ↾ 𝐺):𝐺⟶𝐺 ∧ 𝐺 ⊆ (𝒫 ∪ 𝐺 ∖ {∅})) → ( I ↾ 𝐺):𝐺⟶(𝒫 ∪ 𝐺 ∖ {∅})) | |
13 | 11, 12 | sylan2 593 | . . . . 5 ⊢ ((( I ↾ 𝐺):𝐺⟶𝐺 ∧ 𝐺 ∈ Plig) → ( I ↾ 𝐺):𝐺⟶(𝒫 ∪ 𝐺 ∖ {∅})) |
14 | 13 | ex 412 | . . . 4 ⊢ (( I ↾ 𝐺):𝐺⟶𝐺 → (𝐺 ∈ Plig → ( I ↾ 𝐺):𝐺⟶(𝒫 ∪ 𝐺 ∖ {∅}))) |
15 | 1, 2, 14 | mp2b 10 | . . 3 ⊢ (𝐺 ∈ Plig → ( I ↾ 𝐺):𝐺⟶(𝒫 ∪ 𝐺 ∖ {∅})) |
16 | 15 | ffdmd 6767 | . 2 ⊢ (𝐺 ∈ Plig → ( I ↾ 𝐺):dom ( I ↾ 𝐺)⟶(𝒫 ∪ 𝐺 ∖ {∅})) |
17 | uniexg 7759 | . . 3 ⊢ (𝐺 ∈ Plig → ∪ 𝐺 ∈ V) | |
18 | resiexg 7935 | . . 3 ⊢ (𝐺 ∈ Plig → ( I ↾ 𝐺) ∈ V) | |
19 | isuhgrop 29102 | . . 3 ⊢ ((∪ 𝐺 ∈ V ∧ ( I ↾ 𝐺) ∈ V) → (〈∪ 𝐺, ( I ↾ 𝐺)〉 ∈ UHGraph ↔ ( I ↾ 𝐺):dom ( I ↾ 𝐺)⟶(𝒫 ∪ 𝐺 ∖ {∅}))) | |
20 | 17, 18, 19 | syl2anc 584 | . 2 ⊢ (𝐺 ∈ Plig → (〈∪ 𝐺, ( I ↾ 𝐺)〉 ∈ UHGraph ↔ ( I ↾ 𝐺):dom ( I ↾ 𝐺)⟶(𝒫 ∪ 𝐺 ∖ {∅}))) |
21 | 16, 20 | mpbird 257 | 1 ⊢ (𝐺 ∈ Plig → 〈∪ 𝐺, ( I ↾ 𝐺)〉 ∈ UHGraph) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1537 ∈ wcel 2106 Vcvv 3478 ∖ cdif 3960 ∩ cin 3962 ⊆ wss 3963 ∅c0 4339 𝒫 cpw 4605 {csn 4631 〈cop 4637 ∪ cuni 4912 I cid 5582 dom cdm 5689 ↾ cres 5691 ⟶wf 6559 –1-1-onto→wf1o 6562 UHGraphcuhgr 29088 Pligcplig 30503 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1908 ax-6 1965 ax-7 2005 ax-8 2108 ax-9 2116 ax-10 2139 ax-11 2155 ax-12 2175 ax-ext 2706 ax-sep 5302 ax-nul 5312 ax-pow 5371 ax-pr 5438 ax-un 7754 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1540 df-fal 1550 df-ex 1777 df-nf 1781 df-sb 2063 df-mo 2538 df-eu 2567 df-clab 2713 df-cleq 2727 df-clel 2814 df-nfc 2890 df-ne 2939 df-ral 3060 df-rex 3069 df-rmo 3378 df-reu 3379 df-rab 3434 df-v 3480 df-sbc 3792 df-dif 3966 df-un 3968 df-in 3970 df-ss 3980 df-nul 4340 df-if 4532 df-pw 4607 df-sn 4632 df-pr 4634 df-op 4638 df-uni 4913 df-br 5149 df-opab 5211 df-mpt 5232 df-id 5583 df-xp 5695 df-rel 5696 df-cnv 5697 df-co 5698 df-dm 5699 df-rn 5700 df-res 5701 df-ima 5702 df-iota 6516 df-fun 6565 df-fn 6566 df-f 6567 df-f1 6568 df-fo 6569 df-f1o 6570 df-fv 6571 df-1st 8013 df-2nd 8014 df-vtx 29030 df-iedg 29031 df-uhgr 29090 df-plig 30504 |
This theorem is referenced by: (None) |
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