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Mirrors > Home > MPE Home > Th. List > wwlks2onv | Structured version Visualization version GIF version |
Description: If a length 3 string represents a walk of length 2, its components are vertices. (Contributed by Alexander van der Vekens, 19-Feb-2018.) (Proof shortened by AV, 14-Mar-2022.) |
Ref | Expression |
---|---|
wwlks2onv.v | ⊢ 𝑉 = (Vtx‘𝐺) |
Ref | Expression |
---|---|
wwlks2onv | ⊢ ((𝐵 ∈ 𝑈 ∧ 〈“𝐴𝐵𝐶”〉 ∈ (𝐴(2 WWalksNOn 𝐺)𝐶)) → (𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | wwlks2onv.v | . . . 4 ⊢ 𝑉 = (Vtx‘𝐺) | |
2 | 1 | wwlksonvtx 28121 | . . 3 ⊢ (〈“𝐴𝐵𝐶”〉 ∈ (𝐴(2 WWalksNOn 𝐺)𝐶) → (𝐴 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉)) |
3 | 2 | adantl 481 | . 2 ⊢ ((𝐵 ∈ 𝑈 ∧ 〈“𝐴𝐵𝐶”〉 ∈ (𝐴(2 WWalksNOn 𝐺)𝐶)) → (𝐴 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉)) |
4 | simprl 767 | . . 3 ⊢ (((𝐵 ∈ 𝑈 ∧ 〈“𝐴𝐵𝐶”〉 ∈ (𝐴(2 WWalksNOn 𝐺)𝐶)) ∧ (𝐴 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉)) → 𝐴 ∈ 𝑉) | |
5 | wwlknon 28123 | . . . . . 6 ⊢ (〈“𝐴𝐵𝐶”〉 ∈ (𝐴(2 WWalksNOn 𝐺)𝐶) ↔ (〈“𝐴𝐵𝐶”〉 ∈ (2 WWalksN 𝐺) ∧ (〈“𝐴𝐵𝐶”〉‘0) = 𝐴 ∧ (〈“𝐴𝐵𝐶”〉‘2) = 𝐶)) | |
6 | wwlknbp1 28110 | . . . . . . . 8 ⊢ (〈“𝐴𝐵𝐶”〉 ∈ (2 WWalksN 𝐺) → (2 ∈ ℕ0 ∧ 〈“𝐴𝐵𝐶”〉 ∈ Word (Vtx‘𝐺) ∧ (♯‘〈“𝐴𝐵𝐶”〉) = (2 + 1))) | |
7 | s3fv1 14533 | . . . . . . . . . . . . 13 ⊢ (𝐵 ∈ 𝑈 → (〈“𝐴𝐵𝐶”〉‘1) = 𝐵) | |
8 | 7 | eqcomd 2744 | . . . . . . . . . . . 12 ⊢ (𝐵 ∈ 𝑈 → 𝐵 = (〈“𝐴𝐵𝐶”〉‘1)) |
9 | 8 | adantl 481 | . . . . . . . . . . 11 ⊢ ((〈“𝐴𝐵𝐶”〉 ∈ Word (Vtx‘𝐺) ∧ 𝐵 ∈ 𝑈) → 𝐵 = (〈“𝐴𝐵𝐶”〉‘1)) |
10 | 1 | eqcomi 2747 | . . . . . . . . . . . . . . . 16 ⊢ (Vtx‘𝐺) = 𝑉 |
11 | 10 | wrdeqi 14168 | . . . . . . . . . . . . . . 15 ⊢ Word (Vtx‘𝐺) = Word 𝑉 |
12 | 11 | eleq2i 2830 | . . . . . . . . . . . . . 14 ⊢ (〈“𝐴𝐵𝐶”〉 ∈ Word (Vtx‘𝐺) ↔ 〈“𝐴𝐵𝐶”〉 ∈ Word 𝑉) |
13 | 12 | biimpi 215 | . . . . . . . . . . . . 13 ⊢ (〈“𝐴𝐵𝐶”〉 ∈ Word (Vtx‘𝐺) → 〈“𝐴𝐵𝐶”〉 ∈ Word 𝑉) |
14 | 1ex 10902 | . . . . . . . . . . . . . . 15 ⊢ 1 ∈ V | |
15 | 14 | tpid2 4703 | . . . . . . . . . . . . . 14 ⊢ 1 ∈ {0, 1, 2} |
16 | s3len 14535 | . . . . . . . . . . . . . . . 16 ⊢ (♯‘〈“𝐴𝐵𝐶”〉) = 3 | |
17 | 16 | oveq2i 7266 | . . . . . . . . . . . . . . 15 ⊢ (0..^(♯‘〈“𝐴𝐵𝐶”〉)) = (0..^3) |
18 | fzo0to3tp 13401 | . . . . . . . . . . . . . . 15 ⊢ (0..^3) = {0, 1, 2} | |
19 | 17, 18 | eqtri 2766 | . . . . . . . . . . . . . 14 ⊢ (0..^(♯‘〈“𝐴𝐵𝐶”〉)) = {0, 1, 2} |
20 | 15, 19 | eleqtrri 2838 | . . . . . . . . . . . . 13 ⊢ 1 ∈ (0..^(♯‘〈“𝐴𝐵𝐶”〉)) |
21 | wrdsymbcl 14158 | . . . . . . . . . . . . 13 ⊢ ((〈“𝐴𝐵𝐶”〉 ∈ Word 𝑉 ∧ 1 ∈ (0..^(♯‘〈“𝐴𝐵𝐶”〉))) → (〈“𝐴𝐵𝐶”〉‘1) ∈ 𝑉) | |
22 | 13, 20, 21 | sylancl 585 | . . . . . . . . . . . 12 ⊢ (〈“𝐴𝐵𝐶”〉 ∈ Word (Vtx‘𝐺) → (〈“𝐴𝐵𝐶”〉‘1) ∈ 𝑉) |
23 | 22 | adantr 480 | . . . . . . . . . . 11 ⊢ ((〈“𝐴𝐵𝐶”〉 ∈ Word (Vtx‘𝐺) ∧ 𝐵 ∈ 𝑈) → (〈“𝐴𝐵𝐶”〉‘1) ∈ 𝑉) |
24 | 9, 23 | eqeltrd 2839 | . . . . . . . . . 10 ⊢ ((〈“𝐴𝐵𝐶”〉 ∈ Word (Vtx‘𝐺) ∧ 𝐵 ∈ 𝑈) → 𝐵 ∈ 𝑉) |
25 | 24 | ex 412 | . . . . . . . . 9 ⊢ (〈“𝐴𝐵𝐶”〉 ∈ Word (Vtx‘𝐺) → (𝐵 ∈ 𝑈 → 𝐵 ∈ 𝑉)) |
26 | 25 | 3ad2ant2 1132 | . . . . . . . 8 ⊢ ((2 ∈ ℕ0 ∧ 〈“𝐴𝐵𝐶”〉 ∈ Word (Vtx‘𝐺) ∧ (♯‘〈“𝐴𝐵𝐶”〉) = (2 + 1)) → (𝐵 ∈ 𝑈 → 𝐵 ∈ 𝑉)) |
27 | 6, 26 | syl 17 | . . . . . . 7 ⊢ (〈“𝐴𝐵𝐶”〉 ∈ (2 WWalksN 𝐺) → (𝐵 ∈ 𝑈 → 𝐵 ∈ 𝑉)) |
28 | 27 | 3ad2ant1 1131 | . . . . . 6 ⊢ ((〈“𝐴𝐵𝐶”〉 ∈ (2 WWalksN 𝐺) ∧ (〈“𝐴𝐵𝐶”〉‘0) = 𝐴 ∧ (〈“𝐴𝐵𝐶”〉‘2) = 𝐶) → (𝐵 ∈ 𝑈 → 𝐵 ∈ 𝑉)) |
29 | 5, 28 | sylbi 216 | . . . . 5 ⊢ (〈“𝐴𝐵𝐶”〉 ∈ (𝐴(2 WWalksNOn 𝐺)𝐶) → (𝐵 ∈ 𝑈 → 𝐵 ∈ 𝑉)) |
30 | 29 | impcom 407 | . . . 4 ⊢ ((𝐵 ∈ 𝑈 ∧ 〈“𝐴𝐵𝐶”〉 ∈ (𝐴(2 WWalksNOn 𝐺)𝐶)) → 𝐵 ∈ 𝑉) |
31 | 30 | adantr 480 | . . 3 ⊢ (((𝐵 ∈ 𝑈 ∧ 〈“𝐴𝐵𝐶”〉 ∈ (𝐴(2 WWalksNOn 𝐺)𝐶)) ∧ (𝐴 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉)) → 𝐵 ∈ 𝑉) |
32 | simprr 769 | . . 3 ⊢ (((𝐵 ∈ 𝑈 ∧ 〈“𝐴𝐵𝐶”〉 ∈ (𝐴(2 WWalksNOn 𝐺)𝐶)) ∧ (𝐴 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉)) → 𝐶 ∈ 𝑉) | |
33 | 4, 31, 32 | 3jca 1126 | . 2 ⊢ (((𝐵 ∈ 𝑈 ∧ 〈“𝐴𝐵𝐶”〉 ∈ (𝐴(2 WWalksNOn 𝐺)𝐶)) ∧ (𝐴 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉)) → (𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉)) |
34 | 3, 33 | mpdan 683 | 1 ⊢ ((𝐵 ∈ 𝑈 ∧ 〈“𝐴𝐵𝐶”〉 ∈ (𝐴(2 WWalksNOn 𝐺)𝐶)) → (𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑉 ∧ 𝐶 ∈ 𝑉)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 ∧ w3a 1085 = wceq 1539 ∈ wcel 2108 {ctp 4562 ‘cfv 6418 (class class class)co 7255 0cc0 10802 1c1 10803 + caddc 10805 2c2 11958 3c3 11959 ℕ0cn0 12163 ..^cfzo 13311 ♯chash 13972 Word cword 14145 〈“cs3 14483 Vtxcvtx 27269 WWalksN cwwlksn 28092 WWalksNOn cwwlksnon 28093 |
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-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-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-3 11967 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-s3 14490 df-wwlks 28096 df-wwlksn 28097 df-wwlksnon 28098 |
This theorem is referenced by: frgr2wwlkeqm 28596 |
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