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Mirrors > Home > MPE Home > Th. List > usgr2wlkspthlem2 | Structured version Visualization version GIF version |
Description: Lemma 2 for usgr2wlkspth 28028. (Contributed by Alexander van der Vekens, 2-Mar-2018.) (Revised by AV, 27-Jan-2021.) |
Ref | Expression |
---|---|
usgr2wlkspthlem2 | ⊢ ((𝐹(Walks‘𝐺)𝑃 ∧ (𝐺 ∈ USGraph ∧ (♯‘𝐹) = 2 ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹)))) → Fun ◡𝑃) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simp1 1134 | . . . . . 6 ⊢ ((𝐺 ∈ USGraph ∧ (♯‘𝐹) = 2 ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹))) → 𝐺 ∈ USGraph) | |
2 | 1 | anim2i 616 | . . . . 5 ⊢ ((𝐹(Walks‘𝐺)𝑃 ∧ (𝐺 ∈ USGraph ∧ (♯‘𝐹) = 2 ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹)))) → (𝐹(Walks‘𝐺)𝑃 ∧ 𝐺 ∈ USGraph)) |
3 | 2 | ancomd 461 | . . . 4 ⊢ ((𝐹(Walks‘𝐺)𝑃 ∧ (𝐺 ∈ USGraph ∧ (♯‘𝐹) = 2 ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹)))) → (𝐺 ∈ USGraph ∧ 𝐹(Walks‘𝐺)𝑃)) |
4 | 3simpc 1148 | . . . . 5 ⊢ ((𝐺 ∈ USGraph ∧ (♯‘𝐹) = 2 ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹))) → ((♯‘𝐹) = 2 ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹)))) | |
5 | 4 | adantl 481 | . . . 4 ⊢ ((𝐹(Walks‘𝐺)𝑃 ∧ (𝐺 ∈ USGraph ∧ (♯‘𝐹) = 2 ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹)))) → ((♯‘𝐹) = 2 ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹)))) |
6 | usgr2wlkneq 28025 | . . . 4 ⊢ (((𝐺 ∈ USGraph ∧ 𝐹(Walks‘𝐺)𝑃) ∧ ((♯‘𝐹) = 2 ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹)))) → (((𝑃‘0) ≠ (𝑃‘1) ∧ (𝑃‘0) ≠ (𝑃‘2) ∧ (𝑃‘1) ≠ (𝑃‘2)) ∧ (𝐹‘0) ≠ (𝐹‘1))) | |
7 | 3, 5, 6 | syl2anc 583 | . . 3 ⊢ ((𝐹(Walks‘𝐺)𝑃 ∧ (𝐺 ∈ USGraph ∧ (♯‘𝐹) = 2 ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹)))) → (((𝑃‘0) ≠ (𝑃‘1) ∧ (𝑃‘0) ≠ (𝑃‘2) ∧ (𝑃‘1) ≠ (𝑃‘2)) ∧ (𝐹‘0) ≠ (𝐹‘1))) |
8 | simpl 482 | . . . 4 ⊢ ((((𝑃‘0) ≠ (𝑃‘1) ∧ (𝑃‘0) ≠ (𝑃‘2) ∧ (𝑃‘1) ≠ (𝑃‘2)) ∧ (𝐹‘0) ≠ (𝐹‘1)) → ((𝑃‘0) ≠ (𝑃‘1) ∧ (𝑃‘0) ≠ (𝑃‘2) ∧ (𝑃‘1) ≠ (𝑃‘2))) | |
9 | fvex 6769 | . . . . 5 ⊢ (𝑃‘0) ∈ V | |
10 | fvex 6769 | . . . . 5 ⊢ (𝑃‘1) ∈ V | |
11 | fvex 6769 | . . . . 5 ⊢ (𝑃‘2) ∈ V | |
12 | 9, 10, 11 | 3pm3.2i 1337 | . . . 4 ⊢ ((𝑃‘0) ∈ V ∧ (𝑃‘1) ∈ V ∧ (𝑃‘2) ∈ V) |
13 | 8, 12 | jctil 519 | . . 3 ⊢ ((((𝑃‘0) ≠ (𝑃‘1) ∧ (𝑃‘0) ≠ (𝑃‘2) ∧ (𝑃‘1) ≠ (𝑃‘2)) ∧ (𝐹‘0) ≠ (𝐹‘1)) → (((𝑃‘0) ∈ V ∧ (𝑃‘1) ∈ V ∧ (𝑃‘2) ∈ V) ∧ ((𝑃‘0) ≠ (𝑃‘1) ∧ (𝑃‘0) ≠ (𝑃‘2) ∧ (𝑃‘1) ≠ (𝑃‘2)))) |
14 | funcnvs3 14555 | . . 3 ⊢ ((((𝑃‘0) ∈ V ∧ (𝑃‘1) ∈ V ∧ (𝑃‘2) ∈ V) ∧ ((𝑃‘0) ≠ (𝑃‘1) ∧ (𝑃‘0) ≠ (𝑃‘2) ∧ (𝑃‘1) ≠ (𝑃‘2))) → Fun ◡〈“(𝑃‘0)(𝑃‘1)(𝑃‘2)”〉) | |
15 | 7, 13, 14 | 3syl 18 | . 2 ⊢ ((𝐹(Walks‘𝐺)𝑃 ∧ (𝐺 ∈ USGraph ∧ (♯‘𝐹) = 2 ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹)))) → Fun ◡〈“(𝑃‘0)(𝑃‘1)(𝑃‘2)”〉) |
16 | eqid 2738 | . . . . . 6 ⊢ (Vtx‘𝐺) = (Vtx‘𝐺) | |
17 | 16 | wlkpwrd 27887 | . . . . 5 ⊢ (𝐹(Walks‘𝐺)𝑃 → 𝑃 ∈ Word (Vtx‘𝐺)) |
18 | wlklenvp1 27888 | . . . . . 6 ⊢ (𝐹(Walks‘𝐺)𝑃 → (♯‘𝑃) = ((♯‘𝐹) + 1)) | |
19 | oveq1 7262 | . . . . . . . 8 ⊢ ((♯‘𝐹) = 2 → ((♯‘𝐹) + 1) = (2 + 1)) | |
20 | 2p1e3 12045 | . . . . . . . 8 ⊢ (2 + 1) = 3 | |
21 | 19, 20 | eqtrdi 2795 | . . . . . . 7 ⊢ ((♯‘𝐹) = 2 → ((♯‘𝐹) + 1) = 3) |
22 | 21 | 3ad2ant2 1132 | . . . . . 6 ⊢ ((𝐺 ∈ USGraph ∧ (♯‘𝐹) = 2 ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹))) → ((♯‘𝐹) + 1) = 3) |
23 | 18, 22 | sylan9eq 2799 | . . . . 5 ⊢ ((𝐹(Walks‘𝐺)𝑃 ∧ (𝐺 ∈ USGraph ∧ (♯‘𝐹) = 2 ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹)))) → (♯‘𝑃) = 3) |
24 | wrdlen3s3 14590 | . . . . 5 ⊢ ((𝑃 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑃) = 3) → 𝑃 = 〈“(𝑃‘0)(𝑃‘1)(𝑃‘2)”〉) | |
25 | 17, 23, 24 | syl2an2r 681 | . . . 4 ⊢ ((𝐹(Walks‘𝐺)𝑃 ∧ (𝐺 ∈ USGraph ∧ (♯‘𝐹) = 2 ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹)))) → 𝑃 = 〈“(𝑃‘0)(𝑃‘1)(𝑃‘2)”〉) |
26 | 25 | cnveqd 5773 | . . 3 ⊢ ((𝐹(Walks‘𝐺)𝑃 ∧ (𝐺 ∈ USGraph ∧ (♯‘𝐹) = 2 ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹)))) → ◡𝑃 = ◡〈“(𝑃‘0)(𝑃‘1)(𝑃‘2)”〉) |
27 | 26 | funeqd 6440 | . 2 ⊢ ((𝐹(Walks‘𝐺)𝑃 ∧ (𝐺 ∈ USGraph ∧ (♯‘𝐹) = 2 ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹)))) → (Fun ◡𝑃 ↔ Fun ◡〈“(𝑃‘0)(𝑃‘1)(𝑃‘2)”〉)) |
28 | 15, 27 | mpbird 256 | 1 ⊢ ((𝐹(Walks‘𝐺)𝑃 ∧ (𝐺 ∈ USGraph ∧ (♯‘𝐹) = 2 ∧ (𝑃‘0) ≠ (𝑃‘(♯‘𝐹)))) → Fun ◡𝑃) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 ∧ w3a 1085 = wceq 1539 ∈ wcel 2108 ≠ wne 2942 Vcvv 3422 class class class wbr 5070 ◡ccnv 5579 Fun wfun 6412 ‘cfv 6418 (class class class)co 7255 0cc0 10802 1c1 10803 + caddc 10805 2c2 11958 3c3 11959 ♯chash 13972 Word cword 14145 〈“cs3 14483 Vtxcvtx 27269 USGraphcusgr 27422 Walkscwlks 27866 |
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-2o 8268 df-oadd 8271 df-er 8456 df-map 8575 df-pm 8576 df-en 8692 df-dom 8693 df-sdom 8694 df-fin 8695 df-dju 9590 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-xnn0 12236 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-edg 27321 df-uhgr 27331 df-upgr 27355 df-umgr 27356 df-uspgr 27423 df-usgr 27424 df-wlks 27869 |
This theorem is referenced by: usgr2wlkspth 28028 |
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