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Mirrors > Home > MPE Home > Th. List > cusconngr | Structured version Visualization version GIF version |
Description: A complete hypergraph is connected. (Contributed by Alexander van der Vekens, 4-Dec-2017.) (Revised by AV, 15-Feb-2021.) |
Ref | Expression |
---|---|
cusconngr | ⊢ ((𝐺 ∈ UHGraph ∧ 𝐺 ∈ ComplGraph) → 𝐺 ∈ ConnGraph) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid 2738 | . . . . 5 ⊢ (Vtx‘𝐺) = (Vtx‘𝐺) | |
2 | eqid 2738 | . . . . 5 ⊢ (Edg‘𝐺) = (Edg‘𝐺) | |
3 | 1, 2 | iscplgredg 27687 | . . . 4 ⊢ (𝐺 ∈ UHGraph → (𝐺 ∈ ComplGraph ↔ ∀𝑘 ∈ (Vtx‘𝐺)∀𝑛 ∈ ((Vtx‘𝐺) ∖ {𝑘})∃𝑒 ∈ (Edg‘𝐺){𝑘, 𝑛} ⊆ 𝑒)) |
4 | simp-4l 779 | . . . . . . . 8 ⊢ (((((𝐺 ∈ UHGraph ∧ 𝑘 ∈ (Vtx‘𝐺)) ∧ 𝑛 ∈ ((Vtx‘𝐺) ∖ {𝑘})) ∧ 𝑒 ∈ (Edg‘𝐺)) ∧ {𝑘, 𝑛} ⊆ 𝑒) → 𝐺 ∈ UHGraph) | |
5 | simpr 484 | . . . . . . . . . . 11 ⊢ ((𝐺 ∈ UHGraph ∧ 𝑘 ∈ (Vtx‘𝐺)) → 𝑘 ∈ (Vtx‘𝐺)) | |
6 | eldifi 4057 | . . . . . . . . . . 11 ⊢ (𝑛 ∈ ((Vtx‘𝐺) ∖ {𝑘}) → 𝑛 ∈ (Vtx‘𝐺)) | |
7 | 5, 6 | anim12i 612 | . . . . . . . . . 10 ⊢ (((𝐺 ∈ UHGraph ∧ 𝑘 ∈ (Vtx‘𝐺)) ∧ 𝑛 ∈ ((Vtx‘𝐺) ∖ {𝑘})) → (𝑘 ∈ (Vtx‘𝐺) ∧ 𝑛 ∈ (Vtx‘𝐺))) |
8 | 7 | adantr 480 | . . . . . . . . 9 ⊢ ((((𝐺 ∈ UHGraph ∧ 𝑘 ∈ (Vtx‘𝐺)) ∧ 𝑛 ∈ ((Vtx‘𝐺) ∖ {𝑘})) ∧ 𝑒 ∈ (Edg‘𝐺)) → (𝑘 ∈ (Vtx‘𝐺) ∧ 𝑛 ∈ (Vtx‘𝐺))) |
9 | 8 | adantr 480 | . . . . . . . 8 ⊢ (((((𝐺 ∈ UHGraph ∧ 𝑘 ∈ (Vtx‘𝐺)) ∧ 𝑛 ∈ ((Vtx‘𝐺) ∖ {𝑘})) ∧ 𝑒 ∈ (Edg‘𝐺)) ∧ {𝑘, 𝑛} ⊆ 𝑒) → (𝑘 ∈ (Vtx‘𝐺) ∧ 𝑛 ∈ (Vtx‘𝐺))) |
10 | id 22 | . . . . . . . . . . 11 ⊢ (𝑒 ∈ (Edg‘𝐺) → 𝑒 ∈ (Edg‘𝐺)) | |
11 | sseq2 3943 | . . . . . . . . . . . 12 ⊢ (𝑐 = 𝑒 → ({𝑘, 𝑛} ⊆ 𝑐 ↔ {𝑘, 𝑛} ⊆ 𝑒)) | |
12 | 11 | adantl 481 | . . . . . . . . . . 11 ⊢ ((𝑒 ∈ (Edg‘𝐺) ∧ 𝑐 = 𝑒) → ({𝑘, 𝑛} ⊆ 𝑐 ↔ {𝑘, 𝑛} ⊆ 𝑒)) |
13 | 10, 12 | rspcedv 3544 | . . . . . . . . . 10 ⊢ (𝑒 ∈ (Edg‘𝐺) → ({𝑘, 𝑛} ⊆ 𝑒 → ∃𝑐 ∈ (Edg‘𝐺){𝑘, 𝑛} ⊆ 𝑐)) |
14 | 13 | adantl 481 | . . . . . . . . 9 ⊢ ((((𝐺 ∈ UHGraph ∧ 𝑘 ∈ (Vtx‘𝐺)) ∧ 𝑛 ∈ ((Vtx‘𝐺) ∖ {𝑘})) ∧ 𝑒 ∈ (Edg‘𝐺)) → ({𝑘, 𝑛} ⊆ 𝑒 → ∃𝑐 ∈ (Edg‘𝐺){𝑘, 𝑛} ⊆ 𝑐)) |
15 | 14 | imp 406 | . . . . . . . 8 ⊢ (((((𝐺 ∈ UHGraph ∧ 𝑘 ∈ (Vtx‘𝐺)) ∧ 𝑛 ∈ ((Vtx‘𝐺) ∖ {𝑘})) ∧ 𝑒 ∈ (Edg‘𝐺)) ∧ {𝑘, 𝑛} ⊆ 𝑒) → ∃𝑐 ∈ (Edg‘𝐺){𝑘, 𝑛} ⊆ 𝑐) |
16 | 1, 2 | 1pthon2v 28418 | . . . . . . . 8 ⊢ ((𝐺 ∈ UHGraph ∧ (𝑘 ∈ (Vtx‘𝐺) ∧ 𝑛 ∈ (Vtx‘𝐺)) ∧ ∃𝑐 ∈ (Edg‘𝐺){𝑘, 𝑛} ⊆ 𝑐) → ∃𝑓∃𝑝 𝑓(𝑘(PathsOn‘𝐺)𝑛)𝑝) |
17 | 4, 9, 15, 16 | syl3anc 1369 | . . . . . . 7 ⊢ (((((𝐺 ∈ UHGraph ∧ 𝑘 ∈ (Vtx‘𝐺)) ∧ 𝑛 ∈ ((Vtx‘𝐺) ∖ {𝑘})) ∧ 𝑒 ∈ (Edg‘𝐺)) ∧ {𝑘, 𝑛} ⊆ 𝑒) → ∃𝑓∃𝑝 𝑓(𝑘(PathsOn‘𝐺)𝑛)𝑝) |
18 | 17 | rexlimdva2 3215 | . . . . . 6 ⊢ (((𝐺 ∈ UHGraph ∧ 𝑘 ∈ (Vtx‘𝐺)) ∧ 𝑛 ∈ ((Vtx‘𝐺) ∖ {𝑘})) → (∃𝑒 ∈ (Edg‘𝐺){𝑘, 𝑛} ⊆ 𝑒 → ∃𝑓∃𝑝 𝑓(𝑘(PathsOn‘𝐺)𝑛)𝑝)) |
19 | 18 | ralimdva 3102 | . . . . 5 ⊢ ((𝐺 ∈ UHGraph ∧ 𝑘 ∈ (Vtx‘𝐺)) → (∀𝑛 ∈ ((Vtx‘𝐺) ∖ {𝑘})∃𝑒 ∈ (Edg‘𝐺){𝑘, 𝑛} ⊆ 𝑒 → ∀𝑛 ∈ ((Vtx‘𝐺) ∖ {𝑘})∃𝑓∃𝑝 𝑓(𝑘(PathsOn‘𝐺)𝑛)𝑝)) |
20 | 19 | ralimdva 3102 | . . . 4 ⊢ (𝐺 ∈ UHGraph → (∀𝑘 ∈ (Vtx‘𝐺)∀𝑛 ∈ ((Vtx‘𝐺) ∖ {𝑘})∃𝑒 ∈ (Edg‘𝐺){𝑘, 𝑛} ⊆ 𝑒 → ∀𝑘 ∈ (Vtx‘𝐺)∀𝑛 ∈ ((Vtx‘𝐺) ∖ {𝑘})∃𝑓∃𝑝 𝑓(𝑘(PathsOn‘𝐺)𝑛)𝑝)) |
21 | 3, 20 | sylbid 239 | . . 3 ⊢ (𝐺 ∈ UHGraph → (𝐺 ∈ ComplGraph → ∀𝑘 ∈ (Vtx‘𝐺)∀𝑛 ∈ ((Vtx‘𝐺) ∖ {𝑘})∃𝑓∃𝑝 𝑓(𝑘(PathsOn‘𝐺)𝑛)𝑝)) |
22 | 21 | imp 406 | . 2 ⊢ ((𝐺 ∈ UHGraph ∧ 𝐺 ∈ ComplGraph) → ∀𝑘 ∈ (Vtx‘𝐺)∀𝑛 ∈ ((Vtx‘𝐺) ∖ {𝑘})∃𝑓∃𝑝 𝑓(𝑘(PathsOn‘𝐺)𝑛)𝑝) |
23 | 1 | isconngr1 28455 | . . 3 ⊢ (𝐺 ∈ UHGraph → (𝐺 ∈ ConnGraph ↔ ∀𝑘 ∈ (Vtx‘𝐺)∀𝑛 ∈ ((Vtx‘𝐺) ∖ {𝑘})∃𝑓∃𝑝 𝑓(𝑘(PathsOn‘𝐺)𝑛)𝑝)) |
24 | 23 | adantr 480 | . 2 ⊢ ((𝐺 ∈ UHGraph ∧ 𝐺 ∈ ComplGraph) → (𝐺 ∈ ConnGraph ↔ ∀𝑘 ∈ (Vtx‘𝐺)∀𝑛 ∈ ((Vtx‘𝐺) ∖ {𝑘})∃𝑓∃𝑝 𝑓(𝑘(PathsOn‘𝐺)𝑛)𝑝)) |
25 | 22, 24 | mpbird 256 | 1 ⊢ ((𝐺 ∈ UHGraph ∧ 𝐺 ∈ ComplGraph) → 𝐺 ∈ ConnGraph) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 ∃wex 1783 ∈ wcel 2108 ∀wral 3063 ∃wrex 3064 ∖ cdif 3880 ⊆ wss 3883 {csn 4558 {cpr 4560 class class class wbr 5070 ‘cfv 6418 (class class class)co 7255 Vtxcvtx 27269 Edgcedg 27320 UHGraphcuhgr 27329 ComplGraphccplgr 27679 PathsOncpthson 27983 ConnGraphcconngr 28451 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-ifp 1060 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-int 4877 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-om 7688 df-1st 7804 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-1o 8267 df-er 8456 df-map 8575 df-pm 8576 df-en 8692 df-dom 8693 df-sdom 8694 df-fin 8695 df-card 9628 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-nn 11904 df-2 11966 df-n0 12164 df-z 12250 df-uz 12512 df-fz 13169 df-fzo 13312 df-hash 13973 df-word 14146 df-concat 14202 df-s1 14229 df-s2 14489 df-edg 27321 df-uhgr 27331 df-nbgr 27603 df-uvtx 27656 df-cplgr 27681 df-wlks 27869 df-wlkson 27870 df-trls 27962 df-trlson 27963 df-pths 27985 df-pthson 27987 df-conngr 28452 |
This theorem is referenced by: (None) |
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