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Mirrors > Home > MPE Home > Th. List > wlkonwlk1l | Structured version Visualization version GIF version |
Description: A walk is a walk from its first vertex to its last vertex. (Contributed by AV, 7-Feb-2021.) (Revised by AV, 22-Mar-2021.) |
Ref | Expression |
---|---|
wlkonwlk1l.w | ⊢ (𝜑 → 𝐹(Walks‘𝐺)𝑃) |
Ref | Expression |
---|---|
wlkonwlk1l | ⊢ (𝜑 → 𝐹((𝑃‘0)(WalksOn‘𝐺)(lastS‘𝑃))𝑃) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | wlkonwlk1l.w | . 2 ⊢ (𝜑 → 𝐹(Walks‘𝐺)𝑃) | |
2 | eqidd 2739 | . 2 ⊢ (𝜑 → (𝑃‘0) = (𝑃‘0)) | |
3 | wlklenvm1 27998 | . . . . 5 ⊢ (𝐹(Walks‘𝐺)𝑃 → (♯‘𝐹) = ((♯‘𝑃) − 1)) | |
4 | 3 | fveq2d 6770 | . . . 4 ⊢ (𝐹(Walks‘𝐺)𝑃 → (𝑃‘(♯‘𝐹)) = (𝑃‘((♯‘𝑃) − 1))) |
5 | eqid 2738 | . . . . . 6 ⊢ (Vtx‘𝐺) = (Vtx‘𝐺) | |
6 | 5 | wlkpwrd 27994 | . . . . 5 ⊢ (𝐹(Walks‘𝐺)𝑃 → 𝑃 ∈ Word (Vtx‘𝐺)) |
7 | lsw 14277 | . . . . 5 ⊢ (𝑃 ∈ Word (Vtx‘𝐺) → (lastS‘𝑃) = (𝑃‘((♯‘𝑃) − 1))) | |
8 | 6, 7 | syl 17 | . . . 4 ⊢ (𝐹(Walks‘𝐺)𝑃 → (lastS‘𝑃) = (𝑃‘((♯‘𝑃) − 1))) |
9 | 4, 8 | eqtr4d 2781 | . . 3 ⊢ (𝐹(Walks‘𝐺)𝑃 → (𝑃‘(♯‘𝐹)) = (lastS‘𝑃)) |
10 | 1, 9 | syl 17 | . 2 ⊢ (𝜑 → (𝑃‘(♯‘𝐹)) = (lastS‘𝑃)) |
11 | wlkcl 27992 | . . . . . . . 8 ⊢ (𝐹(Walks‘𝐺)𝑃 → (♯‘𝐹) ∈ ℕ0) | |
12 | nn0p1nn 12282 | . . . . . . . 8 ⊢ ((♯‘𝐹) ∈ ℕ0 → ((♯‘𝐹) + 1) ∈ ℕ) | |
13 | 11, 12 | syl 17 | . . . . . . 7 ⊢ (𝐹(Walks‘𝐺)𝑃 → ((♯‘𝐹) + 1) ∈ ℕ) |
14 | wlklenvp1 27995 | . . . . . . 7 ⊢ (𝐹(Walks‘𝐺)𝑃 → (♯‘𝑃) = ((♯‘𝐹) + 1)) | |
15 | 13, 6, 14 | jca32 516 | . . . . . 6 ⊢ (𝐹(Walks‘𝐺)𝑃 → (((♯‘𝐹) + 1) ∈ ℕ ∧ (𝑃 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑃) = ((♯‘𝐹) + 1)))) |
16 | fstwrdne0 14269 | . . . . . . 7 ⊢ ((((♯‘𝐹) + 1) ∈ ℕ ∧ (𝑃 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑃) = ((♯‘𝐹) + 1))) → (𝑃‘0) ∈ (Vtx‘𝐺)) | |
17 | lswlgt0cl 14282 | . . . . . . 7 ⊢ ((((♯‘𝐹) + 1) ∈ ℕ ∧ (𝑃 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑃) = ((♯‘𝐹) + 1))) → (lastS‘𝑃) ∈ (Vtx‘𝐺)) | |
18 | 16, 17 | jca 512 | . . . . . 6 ⊢ ((((♯‘𝐹) + 1) ∈ ℕ ∧ (𝑃 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑃) = ((♯‘𝐹) + 1))) → ((𝑃‘0) ∈ (Vtx‘𝐺) ∧ (lastS‘𝑃) ∈ (Vtx‘𝐺))) |
19 | 15, 18 | syl 17 | . . . . 5 ⊢ (𝐹(Walks‘𝐺)𝑃 → ((𝑃‘0) ∈ (Vtx‘𝐺) ∧ (lastS‘𝑃) ∈ (Vtx‘𝐺))) |
20 | eqid 2738 | . . . . . . 7 ⊢ (iEdg‘𝐺) = (iEdg‘𝐺) | |
21 | 20 | wlkf 27991 | . . . . . 6 ⊢ (𝐹(Walks‘𝐺)𝑃 → 𝐹 ∈ Word dom (iEdg‘𝐺)) |
22 | wrdv 14242 | . . . . . 6 ⊢ (𝐹 ∈ Word dom (iEdg‘𝐺) → 𝐹 ∈ Word V) | |
23 | 21, 22 | syl 17 | . . . . 5 ⊢ (𝐹(Walks‘𝐺)𝑃 → 𝐹 ∈ Word V) |
24 | 19, 23, 6 | jca32 516 | . . . 4 ⊢ (𝐹(Walks‘𝐺)𝑃 → (((𝑃‘0) ∈ (Vtx‘𝐺) ∧ (lastS‘𝑃) ∈ (Vtx‘𝐺)) ∧ (𝐹 ∈ Word V ∧ 𝑃 ∈ Word (Vtx‘𝐺)))) |
25 | 1, 24 | syl 17 | . . 3 ⊢ (𝜑 → (((𝑃‘0) ∈ (Vtx‘𝐺) ∧ (lastS‘𝑃) ∈ (Vtx‘𝐺)) ∧ (𝐹 ∈ Word V ∧ 𝑃 ∈ Word (Vtx‘𝐺)))) |
26 | 5 | iswlkon 28034 | . . 3 ⊢ ((((𝑃‘0) ∈ (Vtx‘𝐺) ∧ (lastS‘𝑃) ∈ (Vtx‘𝐺)) ∧ (𝐹 ∈ Word V ∧ 𝑃 ∈ Word (Vtx‘𝐺))) → (𝐹((𝑃‘0)(WalksOn‘𝐺)(lastS‘𝑃))𝑃 ↔ (𝐹(Walks‘𝐺)𝑃 ∧ (𝑃‘0) = (𝑃‘0) ∧ (𝑃‘(♯‘𝐹)) = (lastS‘𝑃)))) |
27 | 25, 26 | syl 17 | . 2 ⊢ (𝜑 → (𝐹((𝑃‘0)(WalksOn‘𝐺)(lastS‘𝑃))𝑃 ↔ (𝐹(Walks‘𝐺)𝑃 ∧ (𝑃‘0) = (𝑃‘0) ∧ (𝑃‘(♯‘𝐹)) = (lastS‘𝑃)))) |
28 | 1, 2, 10, 27 | mpbir3and 1341 | 1 ⊢ (𝜑 → 𝐹((𝑃‘0)(WalksOn‘𝐺)(lastS‘𝑃))𝑃) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 ∧ w3a 1086 = wceq 1539 ∈ wcel 2106 Vcvv 3429 class class class wbr 5073 dom cdm 5584 ‘cfv 6426 (class class class)co 7267 0cc0 10881 1c1 10882 + caddc 10884 − cmin 11215 ℕcn 11983 ℕ0cn0 12243 ♯chash 14054 Word cword 14227 lastSclsw 14275 Vtxcvtx 27376 iEdgciedg 27377 Walkscwlks 27973 WalksOncwlkson 27974 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-rep 5208 ax-sep 5221 ax-nul 5228 ax-pow 5286 ax-pr 5350 ax-un 7578 ax-cnex 10937 ax-resscn 10938 ax-1cn 10939 ax-icn 10940 ax-addcl 10941 ax-addrcl 10942 ax-mulcl 10943 ax-mulrcl 10944 ax-mulcom 10945 ax-addass 10946 ax-mulass 10947 ax-distr 10948 ax-i2m1 10949 ax-1ne0 10950 ax-1rid 10951 ax-rnegex 10952 ax-rrecex 10953 ax-cnre 10954 ax-pre-lttri 10955 ax-pre-lttrn 10956 ax-pre-ltadd 10957 ax-pre-mulgt0 10958 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-ifp 1061 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-reu 3071 df-rab 3073 df-v 3431 df-sbc 3716 df-csb 3832 df-dif 3889 df-un 3891 df-in 3893 df-ss 3903 df-pss 3905 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-int 4880 df-iun 4926 df-br 5074 df-opab 5136 df-mpt 5157 df-tr 5191 df-id 5484 df-eprel 5490 df-po 5498 df-so 5499 df-fr 5539 df-we 5541 df-xp 5590 df-rel 5591 df-cnv 5592 df-co 5593 df-dm 5594 df-rn 5595 df-res 5596 df-ima 5597 df-pred 6195 df-ord 6262 df-on 6263 df-lim 6264 df-suc 6265 df-iota 6384 df-fun 6428 df-fn 6429 df-f 6430 df-f1 6431 df-fo 6432 df-f1o 6433 df-fv 6434 df-riota 7224 df-ov 7270 df-oprab 7271 df-mpo 7272 df-om 7703 df-1st 7820 df-2nd 7821 df-frecs 8084 df-wrecs 8115 df-recs 8189 df-rdg 8228 df-1o 8284 df-er 8485 df-map 8604 df-en 8721 df-dom 8722 df-sdom 8723 df-fin 8724 df-card 9707 df-pnf 11021 df-mnf 11022 df-xr 11023 df-ltxr 11024 df-le 11025 df-sub 11217 df-neg 11218 df-nn 11984 df-n0 12244 df-z 12330 df-uz 12593 df-fz 13250 df-fzo 13393 df-hash 14055 df-word 14228 df-lsw 14276 df-wlks 27976 df-wlkson 27977 |
This theorem is referenced by: 3wlkond 28543 |
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