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Theorem clwwlkinwwlk 29560
Description: If the initial vertex of a walk occurs another time in the walk, the walk starts with a closed walk. Since the walk is expressed as a word over vertices, the closed walk can be expressed as a subword of this word. (Contributed by Alexander van der Vekens, 15-Sep-2018.) (Revised by AV, 23-Jan-2022.) (Revised by AV, 30-Oct-2022.)
Assertion
Ref Expression
clwwlkinwwlk (((𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘)) ∧ π‘Š ∈ (𝑀 WWalksN 𝐺) ∧ (π‘Šβ€˜π‘) = (π‘Šβ€˜0)) β†’ (π‘Š prefix 𝑁) ∈ (𝑁 ClWWalksN 𝐺))

Proof of Theorem clwwlkinwwlk
Dummy variable 𝑖 is distinct from all other variables.
StepHypRef Expression
1 eqid 2730 . . 3 (Vtxβ€˜πΊ) = (Vtxβ€˜πΊ)
2 eqid 2730 . . 3 (Edgβ€˜πΊ) = (Edgβ€˜πΊ)
31, 2wwlknp 29364 . 2 (π‘Š ∈ (𝑀 WWalksN 𝐺) β†’ (π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1) ∧ βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)))
4 pfxcl 14631 . . . . . . . . . . . 12 (π‘Š ∈ Word (Vtxβ€˜πΊ) β†’ (π‘Š prefix 𝑁) ∈ Word (Vtxβ€˜πΊ))
54adantr 479 . . . . . . . . . . 11 ((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) β†’ (π‘Š prefix 𝑁) ∈ Word (Vtxβ€˜πΊ))
65adantr 479 . . . . . . . . . 10 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ (π‘Š prefix 𝑁) ∈ Word (Vtxβ€˜πΊ))
7 simpll 763 . . . . . . . . . . 11 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ π‘Š ∈ Word (Vtxβ€˜πΊ))
8 simprl 767 . . . . . . . . . . 11 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ 𝑁 ∈ β„•)
9 eluz2 12832 . . . . . . . . . . . . . . . 16 (𝑀 ∈ (β„€β‰₯β€˜π‘) ↔ (𝑁 ∈ β„€ ∧ 𝑀 ∈ β„€ ∧ 𝑁 ≀ 𝑀))
10 zre 12566 . . . . . . . . . . . . . . . . 17 (𝑁 ∈ β„€ β†’ 𝑁 ∈ ℝ)
11 zre 12566 . . . . . . . . . . . . . . . . 17 (𝑀 ∈ β„€ β†’ 𝑀 ∈ ℝ)
12 id 22 . . . . . . . . . . . . . . . . 17 (𝑁 ≀ 𝑀 β†’ 𝑁 ≀ 𝑀)
1310, 11, 123anim123i 1149 . . . . . . . . . . . . . . . 16 ((𝑁 ∈ β„€ ∧ 𝑀 ∈ β„€ ∧ 𝑁 ≀ 𝑀) β†’ (𝑁 ∈ ℝ ∧ 𝑀 ∈ ℝ ∧ 𝑁 ≀ 𝑀))
149, 13sylbi 216 . . . . . . . . . . . . . . 15 (𝑀 ∈ (β„€β‰₯β€˜π‘) β†’ (𝑁 ∈ ℝ ∧ 𝑀 ∈ ℝ ∧ 𝑁 ≀ 𝑀))
15 letrp1 12062 . . . . . . . . . . . . . . 15 ((𝑁 ∈ ℝ ∧ 𝑀 ∈ ℝ ∧ 𝑁 ≀ 𝑀) β†’ 𝑁 ≀ (𝑀 + 1))
1614, 15syl 17 . . . . . . . . . . . . . 14 (𝑀 ∈ (β„€β‰₯β€˜π‘) β†’ 𝑁 ≀ (𝑀 + 1))
1716adantl 480 . . . . . . . . . . . . 13 ((𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘)) β†’ 𝑁 ≀ (𝑀 + 1))
1817adantl 480 . . . . . . . . . . . 12 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ 𝑁 ≀ (𝑀 + 1))
19 breq2 5151 . . . . . . . . . . . . 13 ((β™―β€˜π‘Š) = (𝑀 + 1) β†’ (𝑁 ≀ (β™―β€˜π‘Š) ↔ 𝑁 ≀ (𝑀 + 1)))
2019ad2antlr 723 . . . . . . . . . . . 12 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ (𝑁 ≀ (β™―β€˜π‘Š) ↔ 𝑁 ≀ (𝑀 + 1)))
2118, 20mpbird 256 . . . . . . . . . . 11 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ 𝑁 ≀ (β™―β€˜π‘Š))
22 pfxn0 14640 . . . . . . . . . . 11 ((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ 𝑁 ∈ β„• ∧ 𝑁 ≀ (β™―β€˜π‘Š)) β†’ (π‘Š prefix 𝑁) β‰  βˆ…)
237, 8, 21, 22syl3anc 1369 . . . . . . . . . 10 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ (π‘Š prefix 𝑁) β‰  βˆ…)
246, 23jca 510 . . . . . . . . 9 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ ((π‘Š prefix 𝑁) ∈ Word (Vtxβ€˜πΊ) ∧ (π‘Š prefix 𝑁) β‰  βˆ…))
25243adantl3 1166 . . . . . . . 8 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1) ∧ βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ ((π‘Š prefix 𝑁) ∈ Word (Vtxβ€˜πΊ) ∧ (π‘Š prefix 𝑁) β‰  βˆ…))
2625adantr 479 . . . . . . 7 ((((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1) ∧ βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) ∧ (π‘Šβ€˜π‘) = (π‘Šβ€˜0)) β†’ ((π‘Š prefix 𝑁) ∈ Word (Vtxβ€˜πΊ) ∧ (π‘Š prefix 𝑁) β‰  βˆ…))
27 nnz 12583 . . . . . . . . . . . . . . . . . 18 (𝑁 ∈ β„• β†’ 𝑁 ∈ β„€)
28 1nn0 12492 . . . . . . . . . . . . . . . . . 18 1 ∈ β„•0
29 eluzmn 12833 . . . . . . . . . . . . . . . . . 18 ((𝑁 ∈ β„€ ∧ 1 ∈ β„•0) β†’ 𝑁 ∈ (β„€β‰₯β€˜(𝑁 βˆ’ 1)))
3027, 28, 29sylancl 584 . . . . . . . . . . . . . . . . 17 (𝑁 ∈ β„• β†’ 𝑁 ∈ (β„€β‰₯β€˜(𝑁 βˆ’ 1)))
31 uzss 12849 . . . . . . . . . . . . . . . . 17 (𝑁 ∈ (β„€β‰₯β€˜(𝑁 βˆ’ 1)) β†’ (β„€β‰₯β€˜π‘) βŠ† (β„€β‰₯β€˜(𝑁 βˆ’ 1)))
3230, 31syl 17 . . . . . . . . . . . . . . . 16 (𝑁 ∈ β„• β†’ (β„€β‰₯β€˜π‘) βŠ† (β„€β‰₯β€˜(𝑁 βˆ’ 1)))
3332sselda 3981 . . . . . . . . . . . . . . 15 ((𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘)) β†’ 𝑀 ∈ (β„€β‰₯β€˜(𝑁 βˆ’ 1)))
34 fzoss2 13664 . . . . . . . . . . . . . . 15 (𝑀 ∈ (β„€β‰₯β€˜(𝑁 βˆ’ 1)) β†’ (0..^(𝑁 βˆ’ 1)) βŠ† (0..^𝑀))
3533, 34syl 17 . . . . . . . . . . . . . 14 ((𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘)) β†’ (0..^(𝑁 βˆ’ 1)) βŠ† (0..^𝑀))
36353ad2ant3 1133 . . . . . . . . . . . . 13 ((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ (0..^(𝑁 βˆ’ 1)) βŠ† (0..^𝑀))
37 ssralv 4049 . . . . . . . . . . . . 13 ((0..^(𝑁 βˆ’ 1)) βŠ† (0..^𝑀) β†’ (βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ) β†’ βˆ€π‘– ∈ (0..^(𝑁 βˆ’ 1)){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)))
3836, 37syl 17 . . . . . . . . . . . 12 ((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ (βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ) β†’ βˆ€π‘– ∈ (0..^(𝑁 βˆ’ 1)){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)))
39383exp 1117 . . . . . . . . . . 11 (π‘Š ∈ Word (Vtxβ€˜πΊ) β†’ ((β™―β€˜π‘Š) = (𝑀 + 1) β†’ ((𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘)) β†’ (βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ) β†’ βˆ€π‘– ∈ (0..^(𝑁 βˆ’ 1)){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)))))
4039com34 91 . . . . . . . . . 10 (π‘Š ∈ Word (Vtxβ€˜πΊ) β†’ ((β™―β€˜π‘Š) = (𝑀 + 1) β†’ (βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ) β†’ ((𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘)) β†’ βˆ€π‘– ∈ (0..^(𝑁 βˆ’ 1)){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)))))
41403imp1 1345 . . . . . . . . 9 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1) ∧ βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ βˆ€π‘– ∈ (0..^(𝑁 βˆ’ 1)){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ))
4241adantr 479 . . . . . . . 8 ((((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1) ∧ βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) ∧ (π‘Šβ€˜π‘) = (π‘Šβ€˜0)) β†’ βˆ€π‘– ∈ (0..^(𝑁 βˆ’ 1)){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ))
43 nnnn0 12483 . . . . . . . . . . . . . . . . . . . 20 (𝑁 ∈ β„• β†’ 𝑁 ∈ β„•0)
44 elnn0uz 12871 . . . . . . . . . . . . . . . . . . . 20 (𝑁 ∈ β„•0 ↔ 𝑁 ∈ (β„€β‰₯β€˜0))
4543, 44sylib 217 . . . . . . . . . . . . . . . . . . 19 (𝑁 ∈ β„• β†’ 𝑁 ∈ (β„€β‰₯β€˜0))
46 eluzfz 13500 . . . . . . . . . . . . . . . . . . 19 ((𝑁 ∈ (β„€β‰₯β€˜0) ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘)) β†’ 𝑁 ∈ (0...𝑀))
4745, 46sylan 578 . . . . . . . . . . . . . . . . . 18 ((𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘)) β†’ 𝑁 ∈ (0...𝑀))
48 fzelp1 13557 . . . . . . . . . . . . . . . . . 18 (𝑁 ∈ (0...𝑀) β†’ 𝑁 ∈ (0...(𝑀 + 1)))
4947, 48syl 17 . . . . . . . . . . . . . . . . 17 ((𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘)) β†’ 𝑁 ∈ (0...(𝑀 + 1)))
5049adantl 480 . . . . . . . . . . . . . . . 16 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ 𝑁 ∈ (0...(𝑀 + 1)))
51 oveq2 7419 . . . . . . . . . . . . . . . . . 18 ((β™―β€˜π‘Š) = (𝑀 + 1) β†’ (0...(β™―β€˜π‘Š)) = (0...(𝑀 + 1)))
5251eleq2d 2817 . . . . . . . . . . . . . . . . 17 ((β™―β€˜π‘Š) = (𝑀 + 1) β†’ (𝑁 ∈ (0...(β™―β€˜π‘Š)) ↔ 𝑁 ∈ (0...(𝑀 + 1))))
5352ad2antlr 723 . . . . . . . . . . . . . . . 16 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ (𝑁 ∈ (0...(β™―β€˜π‘Š)) ↔ 𝑁 ∈ (0...(𝑀 + 1))))
5450, 53mpbird 256 . . . . . . . . . . . . . . 15 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ 𝑁 ∈ (0...(β™―β€˜π‘Š)))
55 pfxlen 14637 . . . . . . . . . . . . . . 15 ((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ 𝑁 ∈ (0...(β™―β€˜π‘Š))) β†’ (β™―β€˜(π‘Š prefix 𝑁)) = 𝑁)
567, 54, 55syl2anc 582 . . . . . . . . . . . . . 14 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ (β™―β€˜(π‘Š prefix 𝑁)) = 𝑁)
5756oveq1d 7426 . . . . . . . . . . . . 13 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ ((β™―β€˜(π‘Š prefix 𝑁)) βˆ’ 1) = (𝑁 βˆ’ 1))
5857oveq2d 7427 . . . . . . . . . . . 12 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ (0..^((β™―β€˜(π‘Š prefix 𝑁)) βˆ’ 1)) = (0..^(𝑁 βˆ’ 1)))
5958raleqdv 3323 . . . . . . . . . . 11 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ (βˆ€π‘– ∈ (0..^((β™―β€˜(π‘Š prefix 𝑁)) βˆ’ 1)){((π‘Š prefix 𝑁)β€˜π‘–), ((π‘Š prefix 𝑁)β€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ) ↔ βˆ€π‘– ∈ (0..^(𝑁 βˆ’ 1)){((π‘Š prefix 𝑁)β€˜π‘–), ((π‘Š prefix 𝑁)β€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)))
607adantr 479 . . . . . . . . . . . . . . 15 ((((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) ∧ 𝑖 ∈ (0..^(𝑁 βˆ’ 1))) β†’ π‘Š ∈ Word (Vtxβ€˜πΊ))
6154adantr 479 . . . . . . . . . . . . . . 15 ((((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) ∧ 𝑖 ∈ (0..^(𝑁 βˆ’ 1))) β†’ 𝑁 ∈ (0...(β™―β€˜π‘Š)))
6230ad2antrl 724 . . . . . . . . . . . . . . . . 17 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ 𝑁 ∈ (β„€β‰₯β€˜(𝑁 βˆ’ 1)))
63 fzoss2 13664 . . . . . . . . . . . . . . . . 17 (𝑁 ∈ (β„€β‰₯β€˜(𝑁 βˆ’ 1)) β†’ (0..^(𝑁 βˆ’ 1)) βŠ† (0..^𝑁))
6462, 63syl 17 . . . . . . . . . . . . . . . 16 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ (0..^(𝑁 βˆ’ 1)) βŠ† (0..^𝑁))
6564sselda 3981 . . . . . . . . . . . . . . 15 ((((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) ∧ 𝑖 ∈ (0..^(𝑁 βˆ’ 1))) β†’ 𝑖 ∈ (0..^𝑁))
66 pfxfv 14636 . . . . . . . . . . . . . . 15 ((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ 𝑁 ∈ (0...(β™―β€˜π‘Š)) ∧ 𝑖 ∈ (0..^𝑁)) β†’ ((π‘Š prefix 𝑁)β€˜π‘–) = (π‘Šβ€˜π‘–))
6760, 61, 65, 66syl3anc 1369 . . . . . . . . . . . . . 14 ((((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) ∧ 𝑖 ∈ (0..^(𝑁 βˆ’ 1))) β†’ ((π‘Š prefix 𝑁)β€˜π‘–) = (π‘Šβ€˜π‘–))
6827ad2antrl 724 . . . . . . . . . . . . . . . 16 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ 𝑁 ∈ β„€)
69 elfzom1elp1fzo 13703 . . . . . . . . . . . . . . . 16 ((𝑁 ∈ β„€ ∧ 𝑖 ∈ (0..^(𝑁 βˆ’ 1))) β†’ (𝑖 + 1) ∈ (0..^𝑁))
7068, 69sylan 578 . . . . . . . . . . . . . . 15 ((((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) ∧ 𝑖 ∈ (0..^(𝑁 βˆ’ 1))) β†’ (𝑖 + 1) ∈ (0..^𝑁))
71 pfxfv 14636 . . . . . . . . . . . . . . 15 ((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ 𝑁 ∈ (0...(β™―β€˜π‘Š)) ∧ (𝑖 + 1) ∈ (0..^𝑁)) β†’ ((π‘Š prefix 𝑁)β€˜(𝑖 + 1)) = (π‘Šβ€˜(𝑖 + 1)))
7260, 61, 70, 71syl3anc 1369 . . . . . . . . . . . . . 14 ((((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) ∧ 𝑖 ∈ (0..^(𝑁 βˆ’ 1))) β†’ ((π‘Š prefix 𝑁)β€˜(𝑖 + 1)) = (π‘Šβ€˜(𝑖 + 1)))
7367, 72preq12d 4744 . . . . . . . . . . . . 13 ((((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) ∧ 𝑖 ∈ (0..^(𝑁 βˆ’ 1))) β†’ {((π‘Š prefix 𝑁)β€˜π‘–), ((π‘Š prefix 𝑁)β€˜(𝑖 + 1))} = {(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))})
7473eleq1d 2816 . . . . . . . . . . . 12 ((((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) ∧ 𝑖 ∈ (0..^(𝑁 βˆ’ 1))) β†’ ({((π‘Š prefix 𝑁)β€˜π‘–), ((π‘Š prefix 𝑁)β€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ) ↔ {(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)))
7574ralbidva 3173 . . . . . . . . . . 11 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ (βˆ€π‘– ∈ (0..^(𝑁 βˆ’ 1)){((π‘Š prefix 𝑁)β€˜π‘–), ((π‘Š prefix 𝑁)β€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ) ↔ βˆ€π‘– ∈ (0..^(𝑁 βˆ’ 1)){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)))
7659, 75bitrd 278 . . . . . . . . . 10 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ (βˆ€π‘– ∈ (0..^((β™―β€˜(π‘Š prefix 𝑁)) βˆ’ 1)){((π‘Š prefix 𝑁)β€˜π‘–), ((π‘Š prefix 𝑁)β€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ) ↔ βˆ€π‘– ∈ (0..^(𝑁 βˆ’ 1)){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)))
77763adantl3 1166 . . . . . . . . 9 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1) ∧ βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ (βˆ€π‘– ∈ (0..^((β™―β€˜(π‘Š prefix 𝑁)) βˆ’ 1)){((π‘Š prefix 𝑁)β€˜π‘–), ((π‘Š prefix 𝑁)β€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ) ↔ βˆ€π‘– ∈ (0..^(𝑁 βˆ’ 1)){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)))
7877adantr 479 . . . . . . . 8 ((((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1) ∧ βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) ∧ (π‘Šβ€˜π‘) = (π‘Šβ€˜0)) β†’ (βˆ€π‘– ∈ (0..^((β™―β€˜(π‘Š prefix 𝑁)) βˆ’ 1)){((π‘Š prefix 𝑁)β€˜π‘–), ((π‘Š prefix 𝑁)β€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ) ↔ βˆ€π‘– ∈ (0..^(𝑁 βˆ’ 1)){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)))
7942, 78mpbird 256 . . . . . . 7 ((((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1) ∧ βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) ∧ (π‘Šβ€˜π‘) = (π‘Šβ€˜0)) β†’ βˆ€π‘– ∈ (0..^((β™―β€˜(π‘Š prefix 𝑁)) βˆ’ 1)){((π‘Š prefix 𝑁)β€˜π‘–), ((π‘Š prefix 𝑁)β€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ))
80 elfz1uz 13575 . . . . . . . . . . . . . 14 ((𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘)) β†’ 𝑁 ∈ (1...𝑀))
81 fzelp1 13557 . . . . . . . . . . . . . 14 (𝑁 ∈ (1...𝑀) β†’ 𝑁 ∈ (1...(𝑀 + 1)))
8280, 81syl 17 . . . . . . . . . . . . 13 ((𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘)) β†’ 𝑁 ∈ (1...(𝑀 + 1)))
8382adantl 480 . . . . . . . . . . . 12 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ 𝑁 ∈ (1...(𝑀 + 1)))
84 oveq2 7419 . . . . . . . . . . . . . 14 ((β™―β€˜π‘Š) = (𝑀 + 1) β†’ (1...(β™―β€˜π‘Š)) = (1...(𝑀 + 1)))
8584eleq2d 2817 . . . . . . . . . . . . 13 ((β™―β€˜π‘Š) = (𝑀 + 1) β†’ (𝑁 ∈ (1...(β™―β€˜π‘Š)) ↔ 𝑁 ∈ (1...(𝑀 + 1))))
8685ad2antlr 723 . . . . . . . . . . . 12 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ (𝑁 ∈ (1...(β™―β€˜π‘Š)) ↔ 𝑁 ∈ (1...(𝑀 + 1))))
8783, 86mpbird 256 . . . . . . . . . . 11 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ 𝑁 ∈ (1...(β™―β€˜π‘Š)))
88 pfxfvlsw 14649 . . . . . . . . . . . 12 ((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ 𝑁 ∈ (1...(β™―β€˜π‘Š))) β†’ (lastSβ€˜(π‘Š prefix 𝑁)) = (π‘Šβ€˜(𝑁 βˆ’ 1)))
89 pfxfv0 14646 . . . . . . . . . . . 12 ((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ 𝑁 ∈ (1...(β™―β€˜π‘Š))) β†’ ((π‘Š prefix 𝑁)β€˜0) = (π‘Šβ€˜0))
9088, 89preq12d 4744 . . . . . . . . . . 11 ((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ 𝑁 ∈ (1...(β™―β€˜π‘Š))) β†’ {(lastSβ€˜(π‘Š prefix 𝑁)), ((π‘Š prefix 𝑁)β€˜0)} = {(π‘Šβ€˜(𝑁 βˆ’ 1)), (π‘Šβ€˜0)})
917, 87, 90syl2anc 582 . . . . . . . . . 10 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ {(lastSβ€˜(π‘Š prefix 𝑁)), ((π‘Š prefix 𝑁)β€˜0)} = {(π‘Šβ€˜(𝑁 βˆ’ 1)), (π‘Šβ€˜0)})
92913adantl3 1166 . . . . . . . . 9 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1) ∧ βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ {(lastSβ€˜(π‘Š prefix 𝑁)), ((π‘Š prefix 𝑁)β€˜0)} = {(π‘Šβ€˜(𝑁 βˆ’ 1)), (π‘Šβ€˜0)})
9392adantr 479 . . . . . . . 8 ((((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1) ∧ βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) ∧ (π‘Šβ€˜π‘) = (π‘Šβ€˜0)) β†’ {(lastSβ€˜(π‘Š prefix 𝑁)), ((π‘Š prefix 𝑁)β€˜0)} = {(π‘Šβ€˜(𝑁 βˆ’ 1)), (π‘Šβ€˜0)})
94 fz1fzo0m1 13684 . . . . . . . . . . . . . . . 16 (𝑁 ∈ (1...𝑀) β†’ (𝑁 βˆ’ 1) ∈ (0..^𝑀))
9580, 94syl 17 . . . . . . . . . . . . . . 15 ((𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘)) β†’ (𝑁 βˆ’ 1) ∈ (0..^𝑀))
96953ad2ant3 1133 . . . . . . . . . . . . . 14 ((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ (𝑁 βˆ’ 1) ∈ (0..^𝑀))
97 simpr 483 . . . . . . . . . . . . . . . . . . . . 21 ((𝑁 ∈ β„• ∧ 𝑖 = (𝑁 βˆ’ 1)) β†’ 𝑖 = (𝑁 βˆ’ 1))
9897fveq2d 6894 . . . . . . . . . . . . . . . . . . . 20 ((𝑁 ∈ β„• ∧ 𝑖 = (𝑁 βˆ’ 1)) β†’ (π‘Šβ€˜π‘–) = (π‘Šβ€˜(𝑁 βˆ’ 1)))
99 oveq1 7418 . . . . . . . . . . . . . . . . . . . . . 22 (𝑖 = (𝑁 βˆ’ 1) β†’ (𝑖 + 1) = ((𝑁 βˆ’ 1) + 1))
100 nncn 12224 . . . . . . . . . . . . . . . . . . . . . . 23 (𝑁 ∈ β„• β†’ 𝑁 ∈ β„‚)
101 npcan1 11643 . . . . . . . . . . . . . . . . . . . . . . 23 (𝑁 ∈ β„‚ β†’ ((𝑁 βˆ’ 1) + 1) = 𝑁)
102100, 101syl 17 . . . . . . . . . . . . . . . . . . . . . 22 (𝑁 ∈ β„• β†’ ((𝑁 βˆ’ 1) + 1) = 𝑁)
10399, 102sylan9eqr 2792 . . . . . . . . . . . . . . . . . . . . 21 ((𝑁 ∈ β„• ∧ 𝑖 = (𝑁 βˆ’ 1)) β†’ (𝑖 + 1) = 𝑁)
104103fveq2d 6894 . . . . . . . . . . . . . . . . . . . 20 ((𝑁 ∈ β„• ∧ 𝑖 = (𝑁 βˆ’ 1)) β†’ (π‘Šβ€˜(𝑖 + 1)) = (π‘Šβ€˜π‘))
10598, 104preq12d 4744 . . . . . . . . . . . . . . . . . . 19 ((𝑁 ∈ β„• ∧ 𝑖 = (𝑁 βˆ’ 1)) β†’ {(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} = {(π‘Šβ€˜(𝑁 βˆ’ 1)), (π‘Šβ€˜π‘)})
106105eleq1d 2816 . . . . . . . . . . . . . . . . . 18 ((𝑁 ∈ β„• ∧ 𝑖 = (𝑁 βˆ’ 1)) β†’ ({(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ) ↔ {(π‘Šβ€˜(𝑁 βˆ’ 1)), (π‘Šβ€˜π‘)} ∈ (Edgβ€˜πΊ)))
107106ex 411 . . . . . . . . . . . . . . . . 17 (𝑁 ∈ β„• β†’ (𝑖 = (𝑁 βˆ’ 1) β†’ ({(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ) ↔ {(π‘Šβ€˜(𝑁 βˆ’ 1)), (π‘Šβ€˜π‘)} ∈ (Edgβ€˜πΊ))))
108107adantr 479 . . . . . . . . . . . . . . . 16 ((𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘)) β†’ (𝑖 = (𝑁 βˆ’ 1) β†’ ({(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ) ↔ {(π‘Šβ€˜(𝑁 βˆ’ 1)), (π‘Šβ€˜π‘)} ∈ (Edgβ€˜πΊ))))
1091083ad2ant3 1133 . . . . . . . . . . . . . . 15 ((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ (𝑖 = (𝑁 βˆ’ 1) β†’ ({(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ) ↔ {(π‘Šβ€˜(𝑁 βˆ’ 1)), (π‘Šβ€˜π‘)} ∈ (Edgβ€˜πΊ))))
110109imp 405 . . . . . . . . . . . . . 14 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) ∧ 𝑖 = (𝑁 βˆ’ 1)) β†’ ({(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ) ↔ {(π‘Šβ€˜(𝑁 βˆ’ 1)), (π‘Šβ€˜π‘)} ∈ (Edgβ€˜πΊ)))
11196, 110rspcdv 3603 . . . . . . . . . . . . 13 ((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ (βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ) β†’ {(π‘Šβ€˜(𝑁 βˆ’ 1)), (π‘Šβ€˜π‘)} ∈ (Edgβ€˜πΊ)))
1121113exp 1117 . . . . . . . . . . . 12 (π‘Š ∈ Word (Vtxβ€˜πΊ) β†’ ((β™―β€˜π‘Š) = (𝑀 + 1) β†’ ((𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘)) β†’ (βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ) β†’ {(π‘Šβ€˜(𝑁 βˆ’ 1)), (π‘Šβ€˜π‘)} ∈ (Edgβ€˜πΊ)))))
113112com34 91 . . . . . . . . . . 11 (π‘Š ∈ Word (Vtxβ€˜πΊ) β†’ ((β™―β€˜π‘Š) = (𝑀 + 1) β†’ (βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ) β†’ ((𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘)) β†’ {(π‘Šβ€˜(𝑁 βˆ’ 1)), (π‘Šβ€˜π‘)} ∈ (Edgβ€˜πΊ)))))
1141133imp1 1345 . . . . . . . . . 10 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1) ∧ βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ {(π‘Šβ€˜(𝑁 βˆ’ 1)), (π‘Šβ€˜π‘)} ∈ (Edgβ€˜πΊ))
115114adantr 479 . . . . . . . . 9 ((((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1) ∧ βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) ∧ (π‘Šβ€˜π‘) = (π‘Šβ€˜0)) β†’ {(π‘Šβ€˜(𝑁 βˆ’ 1)), (π‘Šβ€˜π‘)} ∈ (Edgβ€˜πΊ))
116 preq2 4737 . . . . . . . . . . 11 ((π‘Šβ€˜π‘) = (π‘Šβ€˜0) β†’ {(π‘Šβ€˜(𝑁 βˆ’ 1)), (π‘Šβ€˜π‘)} = {(π‘Šβ€˜(𝑁 βˆ’ 1)), (π‘Šβ€˜0)})
117116eleq1d 2816 . . . . . . . . . 10 ((π‘Šβ€˜π‘) = (π‘Šβ€˜0) β†’ ({(π‘Šβ€˜(𝑁 βˆ’ 1)), (π‘Šβ€˜π‘)} ∈ (Edgβ€˜πΊ) ↔ {(π‘Šβ€˜(𝑁 βˆ’ 1)), (π‘Šβ€˜0)} ∈ (Edgβ€˜πΊ)))
118117adantl 480 . . . . . . . . 9 ((((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1) ∧ βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) ∧ (π‘Šβ€˜π‘) = (π‘Šβ€˜0)) β†’ ({(π‘Šβ€˜(𝑁 βˆ’ 1)), (π‘Šβ€˜π‘)} ∈ (Edgβ€˜πΊ) ↔ {(π‘Šβ€˜(𝑁 βˆ’ 1)), (π‘Šβ€˜0)} ∈ (Edgβ€˜πΊ)))
119115, 118mpbid 231 . . . . . . . 8 ((((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1) ∧ βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) ∧ (π‘Šβ€˜π‘) = (π‘Šβ€˜0)) β†’ {(π‘Šβ€˜(𝑁 βˆ’ 1)), (π‘Šβ€˜0)} ∈ (Edgβ€˜πΊ))
12093, 119eqeltrd 2831 . . . . . . 7 ((((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1) ∧ βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) ∧ (π‘Šβ€˜π‘) = (π‘Šβ€˜0)) β†’ {(lastSβ€˜(π‘Š prefix 𝑁)), ((π‘Š prefix 𝑁)β€˜0)} ∈ (Edgβ€˜πΊ))
12126, 79, 1203jca 1126 . . . . . 6 ((((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1) ∧ βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) ∧ (π‘Šβ€˜π‘) = (π‘Šβ€˜0)) β†’ (((π‘Š prefix 𝑁) ∈ Word (Vtxβ€˜πΊ) ∧ (π‘Š prefix 𝑁) β‰  βˆ…) ∧ βˆ€π‘– ∈ (0..^((β™―β€˜(π‘Š prefix 𝑁)) βˆ’ 1)){((π‘Š prefix 𝑁)β€˜π‘–), ((π‘Š prefix 𝑁)β€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ) ∧ {(lastSβ€˜(π‘Š prefix 𝑁)), ((π‘Š prefix 𝑁)β€˜0)} ∈ (Edgβ€˜πΊ)))
122121exp31 418 . . . . 5 ((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1) ∧ βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)) β†’ ((𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘)) β†’ ((π‘Šβ€˜π‘) = (π‘Šβ€˜0) β†’ (((π‘Š prefix 𝑁) ∈ Word (Vtxβ€˜πΊ) ∧ (π‘Š prefix 𝑁) β‰  βˆ…) ∧ βˆ€π‘– ∈ (0..^((β™―β€˜(π‘Š prefix 𝑁)) βˆ’ 1)){((π‘Š prefix 𝑁)β€˜π‘–), ((π‘Š prefix 𝑁)β€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ) ∧ {(lastSβ€˜(π‘Š prefix 𝑁)), ((π‘Š prefix 𝑁)β€˜0)} ∈ (Edgβ€˜πΊ)))))
1231223imp21 1112 . . . 4 (((𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘)) ∧ (π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1) ∧ βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)) ∧ (π‘Šβ€˜π‘) = (π‘Šβ€˜0)) β†’ (((π‘Š prefix 𝑁) ∈ Word (Vtxβ€˜πΊ) ∧ (π‘Š prefix 𝑁) β‰  βˆ…) ∧ βˆ€π‘– ∈ (0..^((β™―β€˜(π‘Š prefix 𝑁)) βˆ’ 1)){((π‘Š prefix 𝑁)β€˜π‘–), ((π‘Š prefix 𝑁)β€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ) ∧ {(lastSβ€˜(π‘Š prefix 𝑁)), ((π‘Š prefix 𝑁)β€˜0)} ∈ (Edgβ€˜πΊ)))
1241, 2isclwwlk 29504 . . . 4 ((π‘Š prefix 𝑁) ∈ (ClWWalksβ€˜πΊ) ↔ (((π‘Š prefix 𝑁) ∈ Word (Vtxβ€˜πΊ) ∧ (π‘Š prefix 𝑁) β‰  βˆ…) ∧ βˆ€π‘– ∈ (0..^((β™―β€˜(π‘Š prefix 𝑁)) βˆ’ 1)){((π‘Š prefix 𝑁)β€˜π‘–), ((π‘Š prefix 𝑁)β€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ) ∧ {(lastSβ€˜(π‘Š prefix 𝑁)), ((π‘Š prefix 𝑁)β€˜0)} ∈ (Edgβ€˜πΊ)))
125123, 124sylibr 233 . . 3 (((𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘)) ∧ (π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1) ∧ βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)) ∧ (π‘Šβ€˜π‘) = (π‘Šβ€˜0)) β†’ (π‘Š prefix 𝑁) ∈ (ClWWalksβ€˜πΊ))
12647adantl 480 . . . . . . . . . . 11 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ 𝑁 ∈ (0...𝑀))
127126, 48syl 17 . . . . . . . . . 10 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ 𝑁 ∈ (0...(𝑀 + 1)))
128127, 53mpbird 256 . . . . . . . . 9 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ 𝑁 ∈ (0...(β™―β€˜π‘Š)))
1297, 128jca 510 . . . . . . . 8 (((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) ∧ (𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘))) β†’ (π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ 𝑁 ∈ (0...(β™―β€˜π‘Š))))
130129ex 411 . . . . . . 7 ((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1)) β†’ ((𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘)) β†’ (π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ 𝑁 ∈ (0...(β™―β€˜π‘Š)))))
1311303adant3 1130 . . . . . 6 ((π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1) ∧ βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)) β†’ ((𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘)) β†’ (π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ 𝑁 ∈ (0...(β™―β€˜π‘Š)))))
132131impcom 406 . . . . 5 (((𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘)) ∧ (π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1) ∧ βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ))) β†’ (π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ 𝑁 ∈ (0...(β™―β€˜π‘Š))))
1331323adant3 1130 . . . 4 (((𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘)) ∧ (π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1) ∧ βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)) ∧ (π‘Šβ€˜π‘) = (π‘Šβ€˜0)) β†’ (π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ 𝑁 ∈ (0...(β™―β€˜π‘Š))))
134133, 55syl 17 . . 3 (((𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘)) ∧ (π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1) ∧ βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)) ∧ (π‘Šβ€˜π‘) = (π‘Šβ€˜0)) β†’ (β™―β€˜(π‘Š prefix 𝑁)) = 𝑁)
135 isclwwlkn 29547 . . 3 ((π‘Š prefix 𝑁) ∈ (𝑁 ClWWalksN 𝐺) ↔ ((π‘Š prefix 𝑁) ∈ (ClWWalksβ€˜πΊ) ∧ (β™―β€˜(π‘Š prefix 𝑁)) = 𝑁))
136125, 134, 135sylanbrc 581 . 2 (((𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘)) ∧ (π‘Š ∈ Word (Vtxβ€˜πΊ) ∧ (β™―β€˜π‘Š) = (𝑀 + 1) ∧ βˆ€π‘– ∈ (0..^𝑀){(π‘Šβ€˜π‘–), (π‘Šβ€˜(𝑖 + 1))} ∈ (Edgβ€˜πΊ)) ∧ (π‘Šβ€˜π‘) = (π‘Šβ€˜0)) β†’ (π‘Š prefix 𝑁) ∈ (𝑁 ClWWalksN 𝐺))
1373, 136syl3an2 1162 1 (((𝑁 ∈ β„• ∧ 𝑀 ∈ (β„€β‰₯β€˜π‘)) ∧ π‘Š ∈ (𝑀 WWalksN 𝐺) ∧ (π‘Šβ€˜π‘) = (π‘Šβ€˜0)) β†’ (π‘Š prefix 𝑁) ∈ (𝑁 ClWWalksN 𝐺))
Colors of variables: wff setvar class
Syntax hints:   β†’ wi 4   ↔ wb 205   ∧ wa 394   ∧ w3a 1085   = wceq 1539   ∈ wcel 2104   β‰  wne 2938  βˆ€wral 3059   βŠ† wss 3947  βˆ…c0 4321  {cpr 4629   class class class wbr 5147  β€˜cfv 6542  (class class class)co 7411  β„‚cc 11110  β„cr 11111  0cc0 11112  1c1 11113   + caddc 11115   ≀ cle 11253   βˆ’ cmin 11448  β„•cn 12216  β„•0cn0 12476  β„€cz 12562  β„€β‰₯cuz 12826  ...cfz 13488  ..^cfzo 13631  β™―chash 14294  Word cword 14468  lastSclsw 14516   prefix cpfx 14624  Vtxcvtx 28523  Edgcedg 28574   WWalksN cwwlksn 29347  ClWWalkscclwwlk 29501   ClWWalksN cclwwlkn 29544
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1911  ax-6 1969  ax-7 2009  ax-8 2106  ax-9 2114  ax-10 2135  ax-11 2152  ax-12 2169  ax-ext 2701  ax-rep 5284  ax-sep 5298  ax-nul 5305  ax-pow 5362  ax-pr 5426  ax-un 7727  ax-cnex 11168  ax-resscn 11169  ax-1cn 11170  ax-icn 11171  ax-addcl 11172  ax-addrcl 11173  ax-mulcl 11174  ax-mulrcl 11175  ax-mulcom 11176  ax-addass 11177  ax-mulass 11178  ax-distr 11179  ax-i2m1 11180  ax-1ne0 11181  ax-1rid 11182  ax-rnegex 11183  ax-rrecex 11184  ax-cnre 11185  ax-pre-lttri 11186  ax-pre-lttrn 11187  ax-pre-ltadd 11188  ax-pre-mulgt0 11189
This theorem depends on definitions:  df-bi 206  df-an 395  df-or 844  df-3or 1086  df-3an 1087  df-tru 1542  df-fal 1552  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2532  df-eu 2561  df-clab 2708  df-cleq 2722  df-clel 2808  df-nfc 2883  df-ne 2939  df-nel 3045  df-ral 3060  df-rex 3069  df-reu 3375  df-rab 3431  df-v 3474  df-sbc 3777  df-csb 3893  df-dif 3950  df-un 3952  df-in 3954  df-ss 3964  df-pss 3966  df-nul 4322  df-if 4528  df-pw 4603  df-sn 4628  df-pr 4630  df-op 4634  df-uni 4908  df-int 4950  df-iun 4998  df-br 5148  df-opab 5210  df-mpt 5231  df-tr 5265  df-id 5573  df-eprel 5579  df-po 5587  df-so 5588  df-fr 5630  df-we 5632  df-xp 5681  df-rel 5682  df-cnv 5683  df-co 5684  df-dm 5685  df-rn 5686  df-res 5687  df-ima 5688  df-pred 6299  df-ord 6366  df-on 6367  df-lim 6368  df-suc 6369  df-iota 6494  df-fun 6544  df-fn 6545  df-f 6546  df-f1 6547  df-fo 6548  df-f1o 6549  df-fv 6550  df-riota 7367  df-ov 7414  df-oprab 7415  df-mpo 7416  df-om 7858  df-1st 7977  df-2nd 7978  df-frecs 8268  df-wrecs 8299  df-recs 8373  df-rdg 8412  df-1o 8468  df-er 8705  df-map 8824  df-en 8942  df-dom 8943  df-sdom 8944  df-fin 8945  df-card 9936  df-pnf 11254  df-mnf 11255  df-xr 11256  df-ltxr 11257  df-le 11258  df-sub 11450  df-neg 11451  df-nn 12217  df-n0 12477  df-z 12563  df-uz 12827  df-fz 13489  df-fzo 13632  df-hash 14295  df-word 14469  df-lsw 14517  df-substr 14595  df-pfx 14625  df-wwlks 29351  df-wwlksn 29352  df-clwwlk 29502  df-clwwlkn 29545
This theorem is referenced by:  clwwnrepclwwn  29864
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