clwwlkinwwlk - Metamath Proof Explorer

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Theorem clwwlkinwwlk 26905

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.)

**Assertion**
Ref	Expression
clwwlkinwwlk	⊢ (((𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁)) ∧ 𝑊 ∈ (𝑀 WWalksN 𝐺) ∧ (𝑊‘𝑁) = (𝑊‘0)) → (𝑊 substr ⟨0, 𝑁⟩) ∈ (𝑁 ClWWalksN 𝐺))

Proof of Theorem clwwlkinwwlk Dummy variable 𝑖 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		eqid 2622	. . 3 ⊢ (Vtx‘𝐺) = (Vtx‘𝐺)
2		eqid 2622	. . 3 ⊢ (Edg‘𝐺) = (Edg‘𝐺)
3	1, 2	wwlknp 26734	. 2 ⊢ (𝑊 ∈ (𝑀 WWalksN 𝐺) → (𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ ∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)))
4		swrdcl 13419	. . . . . . . . . . . 12 ⊢ (𝑊 ∈ Word (Vtx‘𝐺) → (𝑊 substr ⟨0, 𝑁⟩) ∈ Word (Vtx‘𝐺))
5	4	adantr 481	. . . . . . . . . . 11 ⊢ ((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) → (𝑊 substr ⟨0, 𝑁⟩) ∈ Word (Vtx‘𝐺))
6	5	adantr 481	. . . . . . . . . 10 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → (𝑊 substr ⟨0, 𝑁⟩) ∈ Word (Vtx‘𝐺))
7		simpll 790	. . . . . . . . . . 11 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → 𝑊 ∈ Word (Vtx‘𝐺))
8		simprl 794	. . . . . . . . . . 11 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → 𝑁 ∈ ℕ)
9		eluz2 11693	. . . . . . . . . . . . . . . 16 ⊢ (𝑀 ∈ (ℤ_≥‘𝑁) ↔ (𝑁 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ≤ 𝑀))
10		zre 11381	. . . . . . . . . . . . . . . . 17 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℝ)
11		zre 11381	. . . . . . . . . . . . . . . . 17 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℝ)
12		id 22	. . . . . . . . . . . . . . . . 17 ⊢ (𝑁 ≤ 𝑀 → 𝑁 ≤ 𝑀)
13	10, 11, 12	3anim123i 1247	. . . . . . . . . . . . . . . 16 ⊢ ((𝑁 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ≤ 𝑀) → (𝑁 ∈ ℝ ∧ 𝑀 ∈ ℝ ∧ 𝑁 ≤ 𝑀))
14	9, 13	sylbi 207	. . . . . . . . . . . . . . 15 ⊢ (𝑀 ∈ (ℤ_≥‘𝑁) → (𝑁 ∈ ℝ ∧ 𝑀 ∈ ℝ ∧ 𝑁 ≤ 𝑀))
15		letrp1 10865	. . . . . . . . . . . . . . 15 ⊢ ((𝑁 ∈ ℝ ∧ 𝑀 ∈ ℝ ∧ 𝑁 ≤ 𝑀) → 𝑁 ≤ (𝑀 + 1))
16	14, 15	syl 17	. . . . . . . . . . . . . 14 ⊢ (𝑀 ∈ (ℤ_≥‘𝑁) → 𝑁 ≤ (𝑀 + 1))
17	16	adantl 482	. . . . . . . . . . . . 13 ⊢ ((𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁)) → 𝑁 ≤ (𝑀 + 1))
18	17	adantl 482	. . . . . . . . . . . 12 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → 𝑁 ≤ (𝑀 + 1))
19		breq2 4657	. . . . . . . . . . . . 13 ⊢ ((#‘𝑊) = (𝑀 + 1) → (𝑁 ≤ (#‘𝑊) ↔ 𝑁 ≤ (𝑀 + 1)))
20	19	ad2antlr 763	. . . . . . . . . . . 12 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → (𝑁 ≤ (#‘𝑊) ↔ 𝑁 ≤ (𝑀 + 1)))
21	18, 20	mpbird 247	. . . . . . . . . . 11 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → 𝑁 ≤ (#‘𝑊))
22		swrdn0 13430	. . . . . . . . . . 11 ⊢ ((𝑊 ∈ Word (Vtx‘𝐺) ∧ 𝑁 ∈ ℕ ∧ 𝑁 ≤ (#‘𝑊)) → (𝑊 substr ⟨0, 𝑁⟩) ≠ ∅)
23	7, 8, 21, 22	syl3anc 1326	. . . . . . . . . 10 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → (𝑊 substr ⟨0, 𝑁⟩) ≠ ∅)
24	6, 23	jca 554	. . . . . . . . 9 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → ((𝑊 substr ⟨0, 𝑁⟩) ∈ Word (Vtx‘𝐺) ∧ (𝑊 substr ⟨0, 𝑁⟩) ≠ ∅))
25	24	3adantl3 1219	. . . . . . . 8 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ ∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → ((𝑊 substr ⟨0, 𝑁⟩) ∈ Word (Vtx‘𝐺) ∧ (𝑊 substr ⟨0, 𝑁⟩) ≠ ∅))
26	25	adantr 481	. . . . . . 7 ⊢ ((((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ ∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) ∧ (𝑊‘𝑁) = (𝑊‘0)) → ((𝑊 substr ⟨0, 𝑁⟩) ∈ Word (Vtx‘𝐺) ∧ (𝑊 substr ⟨0, 𝑁⟩) ≠ ∅))
27		nnz 11399	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ ℤ)
28		1nn0 11308	. . . . . . . . . . . . . . . . . 18 ⊢ 1 ∈ ℕ₀
29		eluzmn 11694	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑁 ∈ ℤ ∧ 1 ∈ ℕ₀) → 𝑁 ∈ (ℤ_≥‘(𝑁 − 1)))
30	27, 28, 29	sylancl 694	. . . . . . . . . . . . . . . . 17 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ (ℤ_≥‘(𝑁 − 1)))
31		uzss 11708	. . . . . . . . . . . . . . . . 17 ⊢ (𝑁 ∈ (ℤ_≥‘(𝑁 − 1)) → (ℤ_≥‘𝑁) ⊆ (ℤ_≥‘(𝑁 − 1)))
32	30, 31	syl 17	. . . . . . . . . . . . . . . 16 ⊢ (𝑁 ∈ ℕ → (ℤ_≥‘𝑁) ⊆ (ℤ_≥‘(𝑁 − 1)))
33	32	sselda 3603	. . . . . . . . . . . . . . 15 ⊢ ((𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁)) → 𝑀 ∈ (ℤ_≥‘(𝑁 − 1)))
34		fzoss2 12496	. . . . . . . . . . . . . . 15 ⊢ (𝑀 ∈ (ℤ_≥‘(𝑁 − 1)) → (0..^(𝑁 − 1)) ⊆ (0..^𝑀))
35	33, 34	syl 17	. . . . . . . . . . . . . 14 ⊢ ((𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁)) → (0..^(𝑁 − 1)) ⊆ (0..^𝑀))
36	35	3ad2ant3 1084	. . . . . . . . . . . . 13 ⊢ ((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → (0..^(𝑁 − 1)) ⊆ (0..^𝑀))
37		ssralv 3666	. . . . . . . . . . . . 13 ⊢ ((0..^(𝑁 − 1)) ⊆ (0..^𝑀) → (∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺) → ∀𝑖 ∈ (0..^(𝑁 − 1)){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)))
38	36, 37	syl 17	. . . . . . . . . . . 12 ⊢ ((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → (∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺) → ∀𝑖 ∈ (0..^(𝑁 − 1)){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)))
39	38	3exp 1264	. . . . . . . . . . 11 ⊢ (𝑊 ∈ Word (Vtx‘𝐺) → ((#‘𝑊) = (𝑀 + 1) → ((𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁)) → (∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺) → ∀𝑖 ∈ (0..^(𝑁 − 1)){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)))))
40	39	com34 91	. . . . . . . . . 10 ⊢ (𝑊 ∈ Word (Vtx‘𝐺) → ((#‘𝑊) = (𝑀 + 1) → (∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺) → ((𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁)) → ∀𝑖 ∈ (0..^(𝑁 − 1)){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)))))
41	40	3imp1 1280	. . . . . . . . 9 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ ∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → ∀𝑖 ∈ (0..^(𝑁 − 1)){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺))
42	41	adantr 481	. . . . . . . 8 ⊢ ((((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ ∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) ∧ (𝑊‘𝑁) = (𝑊‘0)) → ∀𝑖 ∈ (0..^(𝑁 − 1)){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺))
43		nnnn0 11299	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ ℕ₀)
44		elnn0uz 11725	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑁 ∈ ℕ₀ ↔ 𝑁 ∈ (ℤ_≥‘0))
45	43, 44	sylib 208	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ (ℤ_≥‘0))
46		eluzfz 12337	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝑁 ∈ (ℤ_≥‘0) ∧ 𝑀 ∈ (ℤ_≥‘𝑁)) → 𝑁 ∈ (0...𝑀))
47	45, 46	sylan 488	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁)) → 𝑁 ∈ (0...𝑀))
48		fzelp1 12393	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑁 ∈ (0...𝑀) → 𝑁 ∈ (0...(𝑀 + 1)))
49	47, 48	syl 17	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁)) → 𝑁 ∈ (0...(𝑀 + 1)))
50	49	adantl 482	. . . . . . . . . . . . . . . 16 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → 𝑁 ∈ (0...(𝑀 + 1)))
51		oveq2 6658	. . . . . . . . . . . . . . . . . 18 ⊢ ((#‘𝑊) = (𝑀 + 1) → (0...(#‘𝑊)) = (0...(𝑀 + 1)))
52	51	eleq2d 2687	. . . . . . . . . . . . . . . . 17 ⊢ ((#‘𝑊) = (𝑀 + 1) → (𝑁 ∈ (0...(#‘𝑊)) ↔ 𝑁 ∈ (0...(𝑀 + 1))))
53	52	ad2antlr 763	. . . . . . . . . . . . . . . 16 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → (𝑁 ∈ (0...(#‘𝑊)) ↔ 𝑁 ∈ (0...(𝑀 + 1))))
54	50, 53	mpbird 247	. . . . . . . . . . . . . . 15 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → 𝑁 ∈ (0...(#‘𝑊)))
55		swrd0len 13422	. . . . . . . . . . . . . . 15 ⊢ ((𝑊 ∈ Word (Vtx‘𝐺) ∧ 𝑁 ∈ (0...(#‘𝑊))) → (#‘(𝑊 substr ⟨0, 𝑁⟩)) = 𝑁)
56	7, 54, 55	syl2anc 693	. . . . . . . . . . . . . 14 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → (#‘(𝑊 substr ⟨0, 𝑁⟩)) = 𝑁)
57	56	oveq1d 6665	. . . . . . . . . . . . 13 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → ((#‘(𝑊 substr ⟨0, 𝑁⟩)) − 1) = (𝑁 − 1))
58	57	oveq2d 6666	. . . . . . . . . . . 12 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → (0..^((#‘(𝑊 substr ⟨0, 𝑁⟩)) − 1)) = (0..^(𝑁 − 1)))
59	58	raleqdv 3144	. . . . . . . . . . 11 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → (∀𝑖 ∈ (0..^((#‘(𝑊 substr ⟨0, 𝑁⟩)) − 1)){((𝑊 substr ⟨0, 𝑁⟩)‘𝑖), ((𝑊 substr ⟨0, 𝑁⟩)‘(𝑖 + 1))} ∈ (Edg‘𝐺) ↔ ∀𝑖 ∈ (0..^(𝑁 − 1)){((𝑊 substr ⟨0, 𝑁⟩)‘𝑖), ((𝑊 substr ⟨0, 𝑁⟩)‘(𝑖 + 1))} ∈ (Edg‘𝐺)))
60	7	adantr 481	. . . . . . . . . . . . . . 15 ⊢ ((((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) ∧ 𝑖 ∈ (0..^(𝑁 − 1))) → 𝑊 ∈ Word (Vtx‘𝐺))
61	54	adantr 481	. . . . . . . . . . . . . . 15 ⊢ ((((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) ∧ 𝑖 ∈ (0..^(𝑁 − 1))) → 𝑁 ∈ (0...(#‘𝑊)))
62	30	ad2antrl 764	. . . . . . . . . . . . . . . . 17 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → 𝑁 ∈ (ℤ_≥‘(𝑁 − 1)))
63		fzoss2 12496	. . . . . . . . . . . . . . . . 17 ⊢ (𝑁 ∈ (ℤ_≥‘(𝑁 − 1)) → (0..^(𝑁 − 1)) ⊆ (0..^𝑁))
64	62, 63	syl 17	. . . . . . . . . . . . . . . 16 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → (0..^(𝑁 − 1)) ⊆ (0..^𝑁))
65	64	sselda 3603	. . . . . . . . . . . . . . 15 ⊢ ((((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) ∧ 𝑖 ∈ (0..^(𝑁 − 1))) → 𝑖 ∈ (0..^𝑁))
66		swrd0fv 13439	. . . . . . . . . . . . . . 15 ⊢ ((𝑊 ∈ Word (Vtx‘𝐺) ∧ 𝑁 ∈ (0...(#‘𝑊)) ∧ 𝑖 ∈ (0..^𝑁)) → ((𝑊 substr ⟨0, 𝑁⟩)‘𝑖) = (𝑊‘𝑖))
67	60, 61, 65, 66	syl3anc 1326	. . . . . . . . . . . . . 14 ⊢ ((((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) ∧ 𝑖 ∈ (0..^(𝑁 − 1))) → ((𝑊 substr ⟨0, 𝑁⟩)‘𝑖) = (𝑊‘𝑖))
68	27	ad2antrl 764	. . . . . . . . . . . . . . . 16 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → 𝑁 ∈ ℤ)
69		elfzom1elp1fzo 12534	. . . . . . . . . . . . . . . 16 ⊢ ((𝑁 ∈ ℤ ∧ 𝑖 ∈ (0..^(𝑁 − 1))) → (𝑖 + 1) ∈ (0..^𝑁))
70	68, 69	sylan 488	. . . . . . . . . . . . . . 15 ⊢ ((((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) ∧ 𝑖 ∈ (0..^(𝑁 − 1))) → (𝑖 + 1) ∈ (0..^𝑁))
71		swrd0fv 13439	. . . . . . . . . . . . . . 15 ⊢ ((𝑊 ∈ Word (Vtx‘𝐺) ∧ 𝑁 ∈ (0...(#‘𝑊)) ∧ (𝑖 + 1) ∈ (0..^𝑁)) → ((𝑊 substr ⟨0, 𝑁⟩)‘(𝑖 + 1)) = (𝑊‘(𝑖 + 1)))
72	60, 61, 70, 71	syl3anc 1326	. . . . . . . . . . . . . 14 ⊢ ((((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) ∧ 𝑖 ∈ (0..^(𝑁 − 1))) → ((𝑊 substr ⟨0, 𝑁⟩)‘(𝑖 + 1)) = (𝑊‘(𝑖 + 1)))
73	67, 72	preq12d 4276	. . . . . . . . . . . . 13 ⊢ ((((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) ∧ 𝑖 ∈ (0..^(𝑁 − 1))) → {((𝑊 substr ⟨0, 𝑁⟩)‘𝑖), ((𝑊 substr ⟨0, 𝑁⟩)‘(𝑖 + 1))} = {(𝑊‘𝑖), (𝑊‘(𝑖 + 1))})
74	73	eleq1d 2686	. . . . . . . . . . . 12 ⊢ ((((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) ∧ 𝑖 ∈ (0..^(𝑁 − 1))) → ({((𝑊 substr ⟨0, 𝑁⟩)‘𝑖), ((𝑊 substr ⟨0, 𝑁⟩)‘(𝑖 + 1))} ∈ (Edg‘𝐺) ↔ {(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)))
75	74	ralbidva 2985	. . . . . . . . . . 11 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → (∀𝑖 ∈ (0..^(𝑁 − 1)){((𝑊 substr ⟨0, 𝑁⟩)‘𝑖), ((𝑊 substr ⟨0, 𝑁⟩)‘(𝑖 + 1))} ∈ (Edg‘𝐺) ↔ ∀𝑖 ∈ (0..^(𝑁 − 1)){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)))
76	59, 75	bitrd 268	. . . . . . . . . 10 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → (∀𝑖 ∈ (0..^((#‘(𝑊 substr ⟨0, 𝑁⟩)) − 1)){((𝑊 substr ⟨0, 𝑁⟩)‘𝑖), ((𝑊 substr ⟨0, 𝑁⟩)‘(𝑖 + 1))} ∈ (Edg‘𝐺) ↔ ∀𝑖 ∈ (0..^(𝑁 − 1)){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)))
77	76	3adantl3 1219	. . . . . . . . 9 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ ∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → (∀𝑖 ∈ (0..^((#‘(𝑊 substr ⟨0, 𝑁⟩)) − 1)){((𝑊 substr ⟨0, 𝑁⟩)‘𝑖), ((𝑊 substr ⟨0, 𝑁⟩)‘(𝑖 + 1))} ∈ (Edg‘𝐺) ↔ ∀𝑖 ∈ (0..^(𝑁 − 1)){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)))
78	77	adantr 481	. . . . . . . 8 ⊢ ((((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ ∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) ∧ (𝑊‘𝑁) = (𝑊‘0)) → (∀𝑖 ∈ (0..^((#‘(𝑊 substr ⟨0, 𝑁⟩)) − 1)){((𝑊 substr ⟨0, 𝑁⟩)‘𝑖), ((𝑊 substr ⟨0, 𝑁⟩)‘(𝑖 + 1))} ∈ (Edg‘𝐺) ↔ ∀𝑖 ∈ (0..^(𝑁 − 1)){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)))
79	42, 78	mpbird 247	. . . . . . 7 ⊢ ((((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ ∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) ∧ (𝑊‘𝑁) = (𝑊‘0)) → ∀𝑖 ∈ (0..^((#‘(𝑊 substr ⟨0, 𝑁⟩)) − 1)){((𝑊 substr ⟨0, 𝑁⟩)‘𝑖), ((𝑊 substr ⟨0, 𝑁⟩)‘(𝑖 + 1))} ∈ (Edg‘𝐺))
80		elfz1uz 12410	. . . . . . . . . . . . . 14 ⊢ ((𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁)) → 𝑁 ∈ (1...𝑀))
81		fzelp1 12393	. . . . . . . . . . . . . 14 ⊢ (𝑁 ∈ (1...𝑀) → 𝑁 ∈ (1...(𝑀 + 1)))
82	80, 81	syl 17	. . . . . . . . . . . . 13 ⊢ ((𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁)) → 𝑁 ∈ (1...(𝑀 + 1)))
83	82	adantl 482	. . . . . . . . . . . 12 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → 𝑁 ∈ (1...(𝑀 + 1)))
84		oveq2 6658	. . . . . . . . . . . . . 14 ⊢ ((#‘𝑊) = (𝑀 + 1) → (1...(#‘𝑊)) = (1...(𝑀 + 1)))
85	84	eleq2d 2687	. . . . . . . . . . . . 13 ⊢ ((#‘𝑊) = (𝑀 + 1) → (𝑁 ∈ (1...(#‘𝑊)) ↔ 𝑁 ∈ (1...(𝑀 + 1))))
86	85	ad2antlr 763	. . . . . . . . . . . 12 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → (𝑁 ∈ (1...(#‘𝑊)) ↔ 𝑁 ∈ (1...(𝑀 + 1))))
87	83, 86	mpbird 247	. . . . . . . . . . 11 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → 𝑁 ∈ (1...(#‘𝑊)))
88		swrd0fvlsw 13443	. . . . . . . . . . . 12 ⊢ ((𝑊 ∈ Word (Vtx‘𝐺) ∧ 𝑁 ∈ (1...(#‘𝑊))) → ( lastS ‘(𝑊 substr ⟨0, 𝑁⟩)) = (𝑊‘(𝑁 − 1)))
89		swrd0fv0 13440	. . . . . . . . . . . 12 ⊢ ((𝑊 ∈ Word (Vtx‘𝐺) ∧ 𝑁 ∈ (1...(#‘𝑊))) → ((𝑊 substr ⟨0, 𝑁⟩)‘0) = (𝑊‘0))
90	88, 89	preq12d 4276	. . . . . . . . . . 11 ⊢ ((𝑊 ∈ Word (Vtx‘𝐺) ∧ 𝑁 ∈ (1...(#‘𝑊))) → {( lastS ‘(𝑊 substr ⟨0, 𝑁⟩)), ((𝑊 substr ⟨0, 𝑁⟩)‘0)} = {(𝑊‘(𝑁 − 1)), (𝑊‘0)})
91	7, 87, 90	syl2anc 693	. . . . . . . . . 10 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → {( lastS ‘(𝑊 substr ⟨0, 𝑁⟩)), ((𝑊 substr ⟨0, 𝑁⟩)‘0)} = {(𝑊‘(𝑁 − 1)), (𝑊‘0)})
92	91	3adantl3 1219	. . . . . . . . 9 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ ∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → {( lastS ‘(𝑊 substr ⟨0, 𝑁⟩)), ((𝑊 substr ⟨0, 𝑁⟩)‘0)} = {(𝑊‘(𝑁 − 1)), (𝑊‘0)})
93	92	adantr 481	. . . . . . . 8 ⊢ ((((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ ∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) ∧ (𝑊‘𝑁) = (𝑊‘0)) → {( lastS ‘(𝑊 substr ⟨0, 𝑁⟩)), ((𝑊 substr ⟨0, 𝑁⟩)‘0)} = {(𝑊‘(𝑁 − 1)), (𝑊‘0)})
94		fz1fzo0m1 12515	. . . . . . . . . . . . . . . 16 ⊢ (𝑁 ∈ (1...𝑀) → (𝑁 − 1) ∈ (0..^𝑀))
95	80, 94	syl 17	. . . . . . . . . . . . . . 15 ⊢ ((𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁)) → (𝑁 − 1) ∈ (0..^𝑀))
96	95	3ad2ant3 1084	. . . . . . . . . . . . . 14 ⊢ ((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → (𝑁 − 1) ∈ (0..^𝑀))
97		simpr 477	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝑁 ∈ ℕ ∧ 𝑖 = (𝑁 − 1)) → 𝑖 = (𝑁 − 1))
98	97	fveq2d 6195	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝑁 ∈ ℕ ∧ 𝑖 = (𝑁 − 1)) → (𝑊‘𝑖) = (𝑊‘(𝑁 − 1)))
99		oveq1 6657	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑖 = (𝑁 − 1) → (𝑖 + 1) = ((𝑁 − 1) + 1))
100		nncn 11028	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ ℂ)
101		npcan1 10455	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝑁 ∈ ℂ → ((𝑁 − 1) + 1) = 𝑁)
102	100, 101	syl 17	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑁 ∈ ℕ → ((𝑁 − 1) + 1) = 𝑁)
103	99, 102	sylan9eqr 2678	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝑁 ∈ ℕ ∧ 𝑖 = (𝑁 − 1)) → (𝑖 + 1) = 𝑁)
104	103	fveq2d 6195	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝑁 ∈ ℕ ∧ 𝑖 = (𝑁 − 1)) → (𝑊‘(𝑖 + 1)) = (𝑊‘𝑁))
105	98, 104	preq12d 4276	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝑁 ∈ ℕ ∧ 𝑖 = (𝑁 − 1)) → {(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} = {(𝑊‘(𝑁 − 1)), (𝑊‘𝑁)})
106	105	eleq1d 2686	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑁 ∈ ℕ ∧ 𝑖 = (𝑁 − 1)) → ({(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺) ↔ {(𝑊‘(𝑁 − 1)), (𝑊‘𝑁)} ∈ (Edg‘𝐺)))
107	106	ex 450	. . . . . . . . . . . . . . . . 17 ⊢ (𝑁 ∈ ℕ → (𝑖 = (𝑁 − 1) → ({(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺) ↔ {(𝑊‘(𝑁 − 1)), (𝑊‘𝑁)} ∈ (Edg‘𝐺))))
108	107	adantr 481	. . . . . . . . . . . . . . . 16 ⊢ ((𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁)) → (𝑖 = (𝑁 − 1) → ({(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺) ↔ {(𝑊‘(𝑁 − 1)), (𝑊‘𝑁)} ∈ (Edg‘𝐺))))
109	108	3ad2ant3 1084	. . . . . . . . . . . . . . 15 ⊢ ((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → (𝑖 = (𝑁 − 1) → ({(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺) ↔ {(𝑊‘(𝑁 − 1)), (𝑊‘𝑁)} ∈ (Edg‘𝐺))))
110	109	imp 445	. . . . . . . . . . . . . 14 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) ∧ 𝑖 = (𝑁 − 1)) → ({(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺) ↔ {(𝑊‘(𝑁 − 1)), (𝑊‘𝑁)} ∈ (Edg‘𝐺)))
111	96, 110	rspcdv 3312	. . . . . . . . . . . . 13 ⊢ ((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → (∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺) → {(𝑊‘(𝑁 − 1)), (𝑊‘𝑁)} ∈ (Edg‘𝐺)))
112	111	3exp 1264	. . . . . . . . . . . 12 ⊢ (𝑊 ∈ Word (Vtx‘𝐺) → ((#‘𝑊) = (𝑀 + 1) → ((𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁)) → (∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺) → {(𝑊‘(𝑁 − 1)), (𝑊‘𝑁)} ∈ (Edg‘𝐺)))))
113	112	com34 91	. . . . . . . . . . 11 ⊢ (𝑊 ∈ Word (Vtx‘𝐺) → ((#‘𝑊) = (𝑀 + 1) → (∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺) → ((𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁)) → {(𝑊‘(𝑁 − 1)), (𝑊‘𝑁)} ∈ (Edg‘𝐺)))))
114	113	3imp1 1280	. . . . . . . . . 10 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ ∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → {(𝑊‘(𝑁 − 1)), (𝑊‘𝑁)} ∈ (Edg‘𝐺))
115	114	adantr 481	. . . . . . . . 9 ⊢ ((((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ ∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) ∧ (𝑊‘𝑁) = (𝑊‘0)) → {(𝑊‘(𝑁 − 1)), (𝑊‘𝑁)} ∈ (Edg‘𝐺))
116		preq2 4269	. . . . . . . . . . 11 ⊢ ((𝑊‘𝑁) = (𝑊‘0) → {(𝑊‘(𝑁 − 1)), (𝑊‘𝑁)} = {(𝑊‘(𝑁 − 1)), (𝑊‘0)})
117	116	eleq1d 2686	. . . . . . . . . 10 ⊢ ((𝑊‘𝑁) = (𝑊‘0) → ({(𝑊‘(𝑁 − 1)), (𝑊‘𝑁)} ∈ (Edg‘𝐺) ↔ {(𝑊‘(𝑁 − 1)), (𝑊‘0)} ∈ (Edg‘𝐺)))
118	117	adantl 482	. . . . . . . . 9 ⊢ ((((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ ∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) ∧ (𝑊‘𝑁) = (𝑊‘0)) → ({(𝑊‘(𝑁 − 1)), (𝑊‘𝑁)} ∈ (Edg‘𝐺) ↔ {(𝑊‘(𝑁 − 1)), (𝑊‘0)} ∈ (Edg‘𝐺)))
119	115, 118	mpbid 222	. . . . . . . 8 ⊢ ((((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ ∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) ∧ (𝑊‘𝑁) = (𝑊‘0)) → {(𝑊‘(𝑁 − 1)), (𝑊‘0)} ∈ (Edg‘𝐺))
120	93, 119	eqeltrd 2701	. . . . . . 7 ⊢ ((((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ ∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) ∧ (𝑊‘𝑁) = (𝑊‘0)) → {( lastS ‘(𝑊 substr ⟨0, 𝑁⟩)), ((𝑊 substr ⟨0, 𝑁⟩)‘0)} ∈ (Edg‘𝐺))
121	26, 79, 120	3jca 1242	. . . . . 6 ⊢ ((((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ ∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) ∧ (𝑊‘𝑁) = (𝑊‘0)) → (((𝑊 substr ⟨0, 𝑁⟩) ∈ Word (Vtx‘𝐺) ∧ (𝑊 substr ⟨0, 𝑁⟩) ≠ ∅) ∧ ∀𝑖 ∈ (0..^((#‘(𝑊 substr ⟨0, 𝑁⟩)) − 1)){((𝑊 substr ⟨0, 𝑁⟩)‘𝑖), ((𝑊 substr ⟨0, 𝑁⟩)‘(𝑖 + 1))} ∈ (Edg‘𝐺) ∧ {( lastS ‘(𝑊 substr ⟨0, 𝑁⟩)), ((𝑊 substr ⟨0, 𝑁⟩)‘0)} ∈ (Edg‘𝐺)))
122	121	exp31 630	. . . . 5 ⊢ ((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ ∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)) → ((𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁)) → ((𝑊‘𝑁) = (𝑊‘0) → (((𝑊 substr ⟨0, 𝑁⟩) ∈ Word (Vtx‘𝐺) ∧ (𝑊 substr ⟨0, 𝑁⟩) ≠ ∅) ∧ ∀𝑖 ∈ (0..^((#‘(𝑊 substr ⟨0, 𝑁⟩)) − 1)){((𝑊 substr ⟨0, 𝑁⟩)‘𝑖), ((𝑊 substr ⟨0, 𝑁⟩)‘(𝑖 + 1))} ∈ (Edg‘𝐺) ∧ {( lastS ‘(𝑊 substr ⟨0, 𝑁⟩)), ((𝑊 substr ⟨0, 𝑁⟩)‘0)} ∈ (Edg‘𝐺)))))
123	122	3imp21 1277	. . . 4 ⊢ (((𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁)) ∧ (𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ ∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)) ∧ (𝑊‘𝑁) = (𝑊‘0)) → (((𝑊 substr ⟨0, 𝑁⟩) ∈ Word (Vtx‘𝐺) ∧ (𝑊 substr ⟨0, 𝑁⟩) ≠ ∅) ∧ ∀𝑖 ∈ (0..^((#‘(𝑊 substr ⟨0, 𝑁⟩)) − 1)){((𝑊 substr ⟨0, 𝑁⟩)‘𝑖), ((𝑊 substr ⟨0, 𝑁⟩)‘(𝑖 + 1))} ∈ (Edg‘𝐺) ∧ {( lastS ‘(𝑊 substr ⟨0, 𝑁⟩)), ((𝑊 substr ⟨0, 𝑁⟩)‘0)} ∈ (Edg‘𝐺)))
124	1, 2	isclwwlks 26880	. . . 4 ⊢ ((𝑊 substr ⟨0, 𝑁⟩) ∈ (ClWWalks‘𝐺) ↔ (((𝑊 substr ⟨0, 𝑁⟩) ∈ Word (Vtx‘𝐺) ∧ (𝑊 substr ⟨0, 𝑁⟩) ≠ ∅) ∧ ∀𝑖 ∈ (0..^((#‘(𝑊 substr ⟨0, 𝑁⟩)) − 1)){((𝑊 substr ⟨0, 𝑁⟩)‘𝑖), ((𝑊 substr ⟨0, 𝑁⟩)‘(𝑖 + 1))} ∈ (Edg‘𝐺) ∧ {( lastS ‘(𝑊 substr ⟨0, 𝑁⟩)), ((𝑊 substr ⟨0, 𝑁⟩)‘0)} ∈ (Edg‘𝐺)))
125	123, 124	sylibr 224	. . 3 ⊢ (((𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁)) ∧ (𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ ∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)) ∧ (𝑊‘𝑁) = (𝑊‘0)) → (𝑊 substr ⟨0, 𝑁⟩) ∈ (ClWWalks‘𝐺))
126	47	adantl 482	. . . . . . . . . . 11 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → 𝑁 ∈ (0...𝑀))
127	126, 48	syl 17	. . . . . . . . . 10 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → 𝑁 ∈ (0...(𝑀 + 1)))
128	127, 53	mpbird 247	. . . . . . . . 9 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → 𝑁 ∈ (0...(#‘𝑊)))
129	7, 128	jca 554	. . . . . . . 8 ⊢ (((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) ∧ (𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁))) → (𝑊 ∈ Word (Vtx‘𝐺) ∧ 𝑁 ∈ (0...(#‘𝑊))))
130	129	ex 450	. . . . . . 7 ⊢ ((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1)) → ((𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁)) → (𝑊 ∈ Word (Vtx‘𝐺) ∧ 𝑁 ∈ (0...(#‘𝑊)))))
131	130	3adant3 1081	. . . . . 6 ⊢ ((𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ ∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)) → ((𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁)) → (𝑊 ∈ Word (Vtx‘𝐺) ∧ 𝑁 ∈ (0...(#‘𝑊)))))
132	131	impcom 446	. . . . 5 ⊢ (((𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁)) ∧ (𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ ∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺))) → (𝑊 ∈ Word (Vtx‘𝐺) ∧ 𝑁 ∈ (0...(#‘𝑊))))
133	132	3adant3 1081	. . . 4 ⊢ (((𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁)) ∧ (𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ ∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)) ∧ (𝑊‘𝑁) = (𝑊‘0)) → (𝑊 ∈ Word (Vtx‘𝐺) ∧ 𝑁 ∈ (0...(#‘𝑊))))
134	133, 55	syl 17	. . 3 ⊢ (((𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁)) ∧ (𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ ∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)) ∧ (𝑊‘𝑁) = (𝑊‘0)) → (#‘(𝑊 substr ⟨0, 𝑁⟩)) = 𝑁)
135		isclwwlksn 26882	. . . . 5 ⊢ (𝑁 ∈ ℕ → ((𝑊 substr ⟨0, 𝑁⟩) ∈ (𝑁 ClWWalksN 𝐺) ↔ ((𝑊 substr ⟨0, 𝑁⟩) ∈ (ClWWalks‘𝐺) ∧ (#‘(𝑊 substr ⟨0, 𝑁⟩)) = 𝑁)))
136	135	adantr 481	. . . 4 ⊢ ((𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁)) → ((𝑊 substr ⟨0, 𝑁⟩) ∈ (𝑁 ClWWalksN 𝐺) ↔ ((𝑊 substr ⟨0, 𝑁⟩) ∈ (ClWWalks‘𝐺) ∧ (#‘(𝑊 substr ⟨0, 𝑁⟩)) = 𝑁)))
137	136	3ad2ant1 1082	. . 3 ⊢ (((𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁)) ∧ (𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ ∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)) ∧ (𝑊‘𝑁) = (𝑊‘0)) → ((𝑊 substr ⟨0, 𝑁⟩) ∈ (𝑁 ClWWalksN 𝐺) ↔ ((𝑊 substr ⟨0, 𝑁⟩) ∈ (ClWWalks‘𝐺) ∧ (#‘(𝑊 substr ⟨0, 𝑁⟩)) = 𝑁)))
138	125, 134, 137	mpbir2and 957	. 2 ⊢ (((𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁)) ∧ (𝑊 ∈ Word (Vtx‘𝐺) ∧ (#‘𝑊) = (𝑀 + 1) ∧ ∀𝑖 ∈ (0..^𝑀){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ (Edg‘𝐺)) ∧ (𝑊‘𝑁) = (𝑊‘0)) → (𝑊 substr ⟨0, 𝑁⟩) ∈ (𝑁 ClWWalksN 𝐺))
139	3, 138	syl3an2 1360	1 ⊢ (((𝑁 ∈ ℕ ∧ 𝑀 ∈ (ℤ_≥‘𝑁)) ∧ 𝑊 ∈ (𝑀 WWalksN 𝐺) ∧ (𝑊‘𝑁) = (𝑊‘0)) → (𝑊 substr ⟨0, 𝑁⟩) ∈ (𝑁 ClWWalksN 𝐺))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 196 ∧ wa 384 ∧ w3a 1037 = wceq 1483 ∈ wcel 1990 ≠ wne 2794 ∀wral 2912 ⊆ wss 3574 ∅c0 3915 {cpr 4179 ⟨cop 4183 class class class wbr 4653 ‘cfv 5888 (class class class)co 6650 ℂcc 9934 ℝcr 9935 0cc0 9936 1c1 9937 + caddc 9939 ≤ cle 10075 − cmin 10266 ℕcn 11020 ℕ₀cn0 11292 ℤcz 11377 ℤ_≥cuz 11687 ...cfz 12326 ..^cfzo 12465 #chash 13117 Word cword 13291 lastS clsw 13292 substr csubstr 13295 Vtxcvtx 25874 Edgcedg 25939 WWalksN cwwlksn 26718 ClWWalkscclwwlks 26875 ClWWalksN cclwwlksn 26876

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-rep 4771 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949 ax-cnex 9992 ax-resscn 9993 ax-1cn 9994 ax-icn 9995 ax-addcl 9996 ax-addrcl 9997 ax-mulcl 9998 ax-mulrcl 9999 ax-mulcom 10000 ax-addass 10001 ax-mulass 10002 ax-distr 10003 ax-i2m1 10004 ax-1ne0 10005 ax-1rid 10006 ax-rnegex 10007 ax-rrecex 10008 ax-cnre 10009 ax-pre-lttri 10010 ax-pre-lttrn 10011 ax-pre-ltadd 10012 ax-pre-mulgt0 10013

This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3or 1038 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-nel 2898 df-ral 2917 df-rex 2918 df-reu 2919 df-rab 2921 df-v 3202 df-sbc 3436 df-csb 3534 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-pss 3590 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-tp 4182 df-op 4184 df-uni 4437 df-int 4476 df-iun 4522 df-br 4654 df-opab 4713 df-mpt 4730 df-tr 4753 df-id 5024 df-eprel 5029 df-po 5035 df-so 5036 df-fr 5073 df-we 5075 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-res 5126 df-ima 5127 df-pred 5680 df-ord 5726 df-on 5727 df-lim 5728 df-suc 5729 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-f1 5893 df-fo 5894 df-f1o 5895 df-fv 5896 df-riota 6611 df-ov 6653 df-oprab 6654 df-mpt2 6655 df-om 7066 df-1st 7168 df-2nd 7169 df-wrecs 7407 df-recs 7468 df-rdg 7506 df-1o 7560 df-oadd 7564 df-er 7742 df-map 7859 df-pm 7860 df-en 7956 df-dom 7957 df-sdom 7958 df-fin 7959 df-card 8765 df-pnf 10076 df-mnf 10077 df-xr 10078 df-ltxr 10079 df-le 10080 df-sub 10268 df-neg 10269 df-nn 11021 df-n0 11293 df-z 11378 df-uz 11688 df-fz 12327 df-fzo 12466 df-hash 13118 df-word 13299 df-lsw 13300 df-substr 13303 df-wwlks 26722 df-wwlksn 26723 df-clwwlks 26877 df-clwwlksn 26878

This theorem is referenced by: extwwlkfablem2 27210

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