wwlksext2clwwlk - Metamath Proof Explorer

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Theorem wwlksext2clwwlk 29299

Description: If a word represents a walk in (in a graph) and there are edges between the last vertex of the word and another vertex and between this other vertex and the first vertex of the word, then the concatenation of the word representing the walk with this other vertex represents a closed walk. (Contributed by Alexander van der Vekens, 3-Oct-2018.) (Revised by AV, 27-Apr-2021.) (Revised by AV, 14-Mar-2022.)

**Hypotheses**
Ref	Expression
clwwlkext2edg.v	⊢ 𝑉 = (Vtx‘𝐺)
clwwlkext2edg.e	⊢ 𝐸 = (Edg‘𝐺)

**Assertion**
Ref	Expression
wwlksext2clwwlk	⊢ ((𝑊 ∈ (𝑁 WWalksN 𝐺) ∧ 𝑍 ∈ 𝑉) → (({(lastS‘𝑊), 𝑍} ∈ 𝐸 ∧ {𝑍, (𝑊‘0)} ∈ 𝐸) → (𝑊 ++ ⟨“𝑍”⟩) ∈ ((𝑁 + 2) ClWWalksN 𝐺)))

Proof of Theorem wwlksext2clwwlk Dummy variable 𝑖 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		wwlknbp1 29087	. . 3 ⊢ (𝑊 ∈ (𝑁 WWalksN 𝐺) → (𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)))
2		clwwlkext2edg.v	. . . . . . . . . . . . 13 ⊢ 𝑉 = (Vtx‘𝐺)
3	2	wrdeqi 14483	. . . . . . . . . . . 12 ⊢ Word 𝑉 = Word (Vtx‘𝐺)
4	3	eleq2i 2825	. . . . . . . . . . 11 ⊢ (𝑊 ∈ Word 𝑉 ↔ 𝑊 ∈ Word (Vtx‘𝐺))
5	4	biimpri 227	. . . . . . . . . 10 ⊢ (𝑊 ∈ Word (Vtx‘𝐺) → 𝑊 ∈ Word 𝑉)
6	5	3ad2ant2 1134	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) → 𝑊 ∈ Word 𝑉)
7	6	ad2antlr 725	. . . . . . . 8 ⊢ (((𝑊 ∈ (𝑁 WWalksN 𝐺) ∧ (𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1))) ∧ 𝑍 ∈ 𝑉) → 𝑊 ∈ Word 𝑉)
8		s1cl 14548	. . . . . . . . 9 ⊢ (𝑍 ∈ 𝑉 → ⟨“𝑍”⟩ ∈ Word 𝑉)
9	8	adantl 482	. . . . . . . 8 ⊢ (((𝑊 ∈ (𝑁 WWalksN 𝐺) ∧ (𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1))) ∧ 𝑍 ∈ 𝑉) → ⟨“𝑍”⟩ ∈ Word 𝑉)
10		ccatcl 14520	. . . . . . . 8 ⊢ ((𝑊 ∈ Word 𝑉 ∧ ⟨“𝑍”⟩ ∈ Word 𝑉) → (𝑊 ++ ⟨“𝑍”⟩) ∈ Word 𝑉)
11	7, 9, 10	syl2anc 584	. . . . . . 7 ⊢ (((𝑊 ∈ (𝑁 WWalksN 𝐺) ∧ (𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1))) ∧ 𝑍 ∈ 𝑉) → (𝑊 ++ ⟨“𝑍”⟩) ∈ Word 𝑉)
12	11	adantr 481	. . . . . 6 ⊢ ((((𝑊 ∈ (𝑁 WWalksN 𝐺) ∧ (𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1))) ∧ 𝑍 ∈ 𝑉) ∧ ({(lastS‘𝑊), 𝑍} ∈ 𝐸 ∧ {𝑍, (𝑊‘0)} ∈ 𝐸)) → (𝑊 ++ ⟨“𝑍”⟩) ∈ Word 𝑉)
13		clwwlkext2edg.e	. . . . . . . . . 10 ⊢ 𝐸 = (Edg‘𝐺)
14	2, 13	wwlknp 29086	. . . . . . . . 9 ⊢ (𝑊 ∈ (𝑁 WWalksN 𝐺) → (𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸))
15		simplll 773	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) ∧ 𝑖 ∈ (0..^𝑁)) → 𝑊 ∈ Word 𝑉)
16	8	adantr 481	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 ⊢ ((𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀) → ⟨“𝑍”⟩ ∈ Word 𝑉)
17	16	ad2antlr 725	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) ∧ 𝑖 ∈ (0..^𝑁)) → ⟨“𝑍”⟩ ∈ Word 𝑉)
18		elfzo0 13669	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 ⊢ (𝑖 ∈ (0..^𝑁) ↔ (𝑖 ∈ ℕ₀ ∧ 𝑁 ∈ ℕ ∧ 𝑖 < 𝑁))
19		simp1 1136	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 ⊢ ((𝑖 ∈ ℕ₀ ∧ 𝑁 ∈ ℕ ∧ 𝑖 < 𝑁) → 𝑖 ∈ ℕ₀)
20		peano2nn 12220	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 ⊢ (𝑁 ∈ ℕ → (𝑁 + 1) ∈ ℕ)
21	20	3ad2ant2 1134	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 ⊢ ((𝑖 ∈ ℕ₀ ∧ 𝑁 ∈ ℕ ∧ 𝑖 < 𝑁) → (𝑁 + 1) ∈ ℕ)
22		nn0re 12477	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 ⊢ (𝑖 ∈ ℕ₀ → 𝑖 ∈ ℝ)
23	22	3ad2ant1 1133	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 ⊢ ((𝑖 ∈ ℕ₀ ∧ 𝑁 ∈ ℕ ∧ 𝑖 < 𝑁) → 𝑖 ∈ ℝ)
24		nnre 12215	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ ℝ)
25	24	3ad2ant2 1134	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 ⊢ ((𝑖 ∈ ℕ₀ ∧ 𝑁 ∈ ℕ ∧ 𝑖 < 𝑁) → 𝑁 ∈ ℝ)
26		peano2re 11383	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 ⊢ (𝑁 ∈ ℝ → (𝑁 + 1) ∈ ℝ)
27	24, 26	syl 17	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 ⊢ (𝑁 ∈ ℕ → (𝑁 + 1) ∈ ℝ)
28	27	3ad2ant2 1134	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 ⊢ ((𝑖 ∈ ℕ₀ ∧ 𝑁 ∈ ℕ ∧ 𝑖 < 𝑁) → (𝑁 + 1) ∈ ℝ)
29		simp3 1138	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 ⊢ ((𝑖 ∈ ℕ₀ ∧ 𝑁 ∈ ℕ ∧ 𝑖 < 𝑁) → 𝑖 < 𝑁)
30	24	ltp1d 12140	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 ⊢ (𝑁 ∈ ℕ → 𝑁 < (𝑁 + 1))
31	30	3ad2ant2 1134	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 ⊢ ((𝑖 ∈ ℕ₀ ∧ 𝑁 ∈ ℕ ∧ 𝑖 < 𝑁) → 𝑁 < (𝑁 + 1))
32	23, 25, 28, 29, 31	lttrd 11371	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 ⊢ ((𝑖 ∈ ℕ₀ ∧ 𝑁 ∈ ℕ ∧ 𝑖 < 𝑁) → 𝑖 < (𝑁 + 1))
33		elfzo0 13669	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 ⊢ (𝑖 ∈ (0..^(𝑁 + 1)) ↔ (𝑖 ∈ ℕ₀ ∧ (𝑁 + 1) ∈ ℕ ∧ 𝑖 < (𝑁 + 1)))
34	19, 21, 32, 33	syl3anbrc 1343	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 ⊢ ((𝑖 ∈ ℕ₀ ∧ 𝑁 ∈ ℕ ∧ 𝑖 < 𝑁) → 𝑖 ∈ (0..^(𝑁 + 1)))
35	18, 34	sylbi 216	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 ⊢ (𝑖 ∈ (0..^𝑁) → 𝑖 ∈ (0..^(𝑁 + 1)))
36	35	adantl 482	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) ∧ 𝑖 ∈ (0..^𝑁)) → 𝑖 ∈ (0..^(𝑁 + 1)))
37		oveq2 7413	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 ⊢ ((♯‘𝑊) = (𝑁 + 1) → (0..^(♯‘𝑊)) = (0..^(𝑁 + 1)))
38	37	adantl 482	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 ⊢ ((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) → (0..^(♯‘𝑊)) = (0..^(𝑁 + 1)))
39	38	eleq2d 2819	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 ⊢ ((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) → (𝑖 ∈ (0..^(♯‘𝑊)) ↔ 𝑖 ∈ (0..^(𝑁 + 1))))
40	39	ad2antrr 724	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) ∧ 𝑖 ∈ (0..^𝑁)) → (𝑖 ∈ (0..^(♯‘𝑊)) ↔ 𝑖 ∈ (0..^(𝑁 + 1))))
41	36, 40	mpbird 256	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) ∧ 𝑖 ∈ (0..^𝑁)) → 𝑖 ∈ (0..^(♯‘𝑊)))
42		ccatval1 14523	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ ((𝑊 ∈ Word 𝑉 ∧ ⟨“𝑍”⟩ ∈ Word 𝑉 ∧ 𝑖 ∈ (0..^(♯‘𝑊))) → ((𝑊 ++ ⟨“𝑍”⟩)‘𝑖) = (𝑊‘𝑖))
43	15, 17, 41, 42	syl3anc 1371	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) ∧ 𝑖 ∈ (0..^𝑁)) → ((𝑊 ++ ⟨“𝑍”⟩)‘𝑖) = (𝑊‘𝑖))
44		fzonn0p1p1 13707	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 ⊢ (𝑖 ∈ (0..^𝑁) → (𝑖 + 1) ∈ (0..^(𝑁 + 1)))
45	44	adantl 482	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) ∧ 𝑖 ∈ (0..^𝑁)) → (𝑖 + 1) ∈ (0..^(𝑁 + 1)))
46	37	eleq2d 2819	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 ⊢ ((♯‘𝑊) = (𝑁 + 1) → ((𝑖 + 1) ∈ (0..^(♯‘𝑊)) ↔ (𝑖 + 1) ∈ (0..^(𝑁 + 1))))
47	46	ad3antlr 729	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) ∧ 𝑖 ∈ (0..^𝑁)) → ((𝑖 + 1) ∈ (0..^(♯‘𝑊)) ↔ (𝑖 + 1) ∈ (0..^(𝑁 + 1))))
48	45, 47	mpbird 256	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) ∧ 𝑖 ∈ (0..^𝑁)) → (𝑖 + 1) ∈ (0..^(♯‘𝑊)))
49		ccatval1 14523	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ ((𝑊 ∈ Word 𝑉 ∧ ⟨“𝑍”⟩ ∈ Word 𝑉 ∧ (𝑖 + 1) ∈ (0..^(♯‘𝑊))) → ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1)) = (𝑊‘(𝑖 + 1)))
50	15, 17, 48, 49	syl3anc 1371	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) ∧ 𝑖 ∈ (0..^𝑁)) → ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1)) = (𝑊‘(𝑖 + 1)))
51	43, 50	preq12d 4744	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) ∧ 𝑖 ∈ (0..^𝑁)) → {((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} = {(𝑊‘𝑖), (𝑊‘(𝑖 + 1))})
52	51	ex 413	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → (𝑖 ∈ (0..^𝑁) → {((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} = {(𝑊‘𝑖), (𝑊‘(𝑖 + 1))}))
53	52	expcom 414	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ ((𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀) → ((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) → (𝑖 ∈ (0..^𝑁) → {((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} = {(𝑊‘𝑖), (𝑊‘(𝑖 + 1))})))
54	53	expcom 414	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (𝑁 ∈ ℕ₀ → (𝑍 ∈ 𝑉 → ((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) → (𝑖 ∈ (0..^𝑁) → {((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} = {(𝑊‘𝑖), (𝑊‘(𝑖 + 1))}))))
55	54	3ad2ant1 1133	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) → (𝑍 ∈ 𝑉 → ((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) → (𝑖 ∈ (0..^𝑁) → {((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} = {(𝑊‘𝑖), (𝑊‘(𝑖 + 1))}))))
56	55	imp 407	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉) → ((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) → (𝑖 ∈ (0..^𝑁) → {((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} = {(𝑊‘𝑖), (𝑊‘(𝑖 + 1))})))
57	56	expdcom 415	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝑊 ∈ Word 𝑉 → ((♯‘𝑊) = (𝑁 + 1) → (((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉) → (𝑖 ∈ (0..^𝑁) → {((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} = {(𝑊‘𝑖), (𝑊‘(𝑖 + 1))}))))
58	57	3imp1 1347	. . . . . . . . . . . . . . . . . . . 20 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉)) ∧ 𝑖 ∈ (0..^𝑁)) → {((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} = {(𝑊‘𝑖), (𝑊‘(𝑖 + 1))})
59	58	eleq1d 2818	. . . . . . . . . . . . . . . . . . 19 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉)) ∧ 𝑖 ∈ (0..^𝑁)) → ({((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} ∈ 𝐸 ↔ {(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸))
60	59	ralbidva 3175	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉)) → (∀𝑖 ∈ (0..^𝑁){((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} ∈ 𝐸 ↔ ∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸))
61	60	biimprd 247	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉)) → (∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸 → ∀𝑖 ∈ (0..^𝑁){((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} ∈ 𝐸))
62	61	3exp 1119	. . . . . . . . . . . . . . . 16 ⊢ (𝑊 ∈ Word 𝑉 → ((♯‘𝑊) = (𝑁 + 1) → (((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉) → (∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸 → ∀𝑖 ∈ (0..^𝑁){((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} ∈ 𝐸))))
63	62	com34 91	. . . . . . . . . . . . . . 15 ⊢ (𝑊 ∈ Word 𝑉 → ((♯‘𝑊) = (𝑁 + 1) → (∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸 → (((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉) → ∀𝑖 ∈ (0..^𝑁){((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} ∈ 𝐸))))
64	63	3imp1 1347	. . . . . . . . . . . . . 14 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸) ∧ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉)) → ∀𝑖 ∈ (0..^𝑁){((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} ∈ 𝐸)
65	64	adantr 481	. . . . . . . . . . . . 13 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸) ∧ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉)) ∧ {(lastS‘𝑊), 𝑍} ∈ 𝐸) → ∀𝑖 ∈ (0..^𝑁){((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} ∈ 𝐸)
66		simpll 765	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → 𝑊 ∈ Word 𝑉)
67	8	ad2antrl 726	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → ⟨“𝑍”⟩ ∈ Word 𝑉)
68		nn0p1gt0 12497	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ (𝑁 ∈ ℕ₀ → 0 < (𝑁 + 1))
69	68	ad2antll 727	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → 0 < (𝑁 + 1))
70		breq2 5151	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ ((♯‘𝑊) = (𝑁 + 1) → (0 < (♯‘𝑊) ↔ 0 < (𝑁 + 1)))
71	70	ad2antlr 725	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → (0 < (♯‘𝑊) ↔ 0 < (𝑁 + 1)))
72	69, 71	mpbird 256	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → 0 < (♯‘𝑊))
73		hashneq0 14320	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ (𝑊 ∈ Word 𝑉 → (0 < (♯‘𝑊) ↔ 𝑊 ≠ ∅))
74	73	ad2antrr 724	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → (0 < (♯‘𝑊) ↔ 𝑊 ≠ ∅))
75	72, 74	mpbid 231	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → 𝑊 ≠ ∅)
76		ccatval1lsw 14530	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((𝑊 ∈ Word 𝑉 ∧ ⟨“𝑍”⟩ ∈ Word 𝑉 ∧ 𝑊 ≠ ∅) → ((𝑊 ++ ⟨“𝑍”⟩)‘((♯‘𝑊) − 1)) = (lastS‘𝑊))
77	66, 67, 75, 76	syl3anc 1371	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → ((𝑊 ++ ⟨“𝑍”⟩)‘((♯‘𝑊) − 1)) = (lastS‘𝑊))
78		oveq1 7412	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ ((♯‘𝑊) = (𝑁 + 1) → ((♯‘𝑊) − 1) = ((𝑁 + 1) − 1))
79	78	ad2antlr 725	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → ((♯‘𝑊) − 1) = ((𝑁 + 1) − 1))
80		nn0cn 12478	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ (𝑁 ∈ ℕ₀ → 𝑁 ∈ ℂ)
81	80	ad2antll 727	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → 𝑁 ∈ ℂ)
82		pncan1 11634	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ (𝑁 ∈ ℂ → ((𝑁 + 1) − 1) = 𝑁)
83	81, 82	syl 17	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → ((𝑁 + 1) − 1) = 𝑁)
84	79, 83	eqtrd 2772	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → ((♯‘𝑊) − 1) = 𝑁)
85	84	fveq2d 6892	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → ((𝑊 ++ ⟨“𝑍”⟩)‘((♯‘𝑊) − 1)) = ((𝑊 ++ ⟨“𝑍”⟩)‘𝑁))
86	77, 85	eqtr3d 2774	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → (lastS‘𝑊) = ((𝑊 ++ ⟨“𝑍”⟩)‘𝑁))
87		ccatws1ls 14579	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((𝑊 ∈ Word 𝑉 ∧ 𝑍 ∈ 𝑉) → ((𝑊 ++ ⟨“𝑍”⟩)‘(♯‘𝑊)) = 𝑍)
88	87	ad2ant2r 745	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → ((𝑊 ++ ⟨“𝑍”⟩)‘(♯‘𝑊)) = 𝑍)
89		fveq2 6888	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((♯‘𝑊) = (𝑁 + 1) → ((𝑊 ++ ⟨“𝑍”⟩)‘(♯‘𝑊)) = ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑁 + 1)))
90	89	ad2antlr 725	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → ((𝑊 ++ ⟨“𝑍”⟩)‘(♯‘𝑊)) = ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑁 + 1)))
91	88, 90	eqtr3d 2774	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → 𝑍 = ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑁 + 1)))
92	86, 91	preq12d 4744	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → {(lastS‘𝑊), 𝑍} = {((𝑊 ++ ⟨“𝑍”⟩)‘𝑁), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑁 + 1))})
93	92	expcom 414	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀) → ((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) → {(lastS‘𝑊), 𝑍} = {((𝑊 ++ ⟨“𝑍”⟩)‘𝑁), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑁 + 1))}))
94	93	expcom 414	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝑁 ∈ ℕ₀ → (𝑍 ∈ 𝑉 → ((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) → {(lastS‘𝑊), 𝑍} = {((𝑊 ++ ⟨“𝑍”⟩)‘𝑁), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑁 + 1))})))
95	94	3ad2ant1 1133	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) → (𝑍 ∈ 𝑉 → ((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) → {(lastS‘𝑊), 𝑍} = {((𝑊 ++ ⟨“𝑍”⟩)‘𝑁), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑁 + 1))})))
96	95	imp 407	. . . . . . . . . . . . . . . . . . 19 ⊢ (((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉) → ((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) → {(lastS‘𝑊), 𝑍} = {((𝑊 ++ ⟨“𝑍”⟩)‘𝑁), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑁 + 1))}))
97	96	com12 32	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) → (((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉) → {(lastS‘𝑊), 𝑍} = {((𝑊 ++ ⟨“𝑍”⟩)‘𝑁), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑁 + 1))}))
98	97	3adant3 1132	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸) → (((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉) → {(lastS‘𝑊), 𝑍} = {((𝑊 ++ ⟨“𝑍”⟩)‘𝑁), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑁 + 1))}))
99	98	imp 407	. . . . . . . . . . . . . . . 16 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸) ∧ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉)) → {(lastS‘𝑊), 𝑍} = {((𝑊 ++ ⟨“𝑍”⟩)‘𝑁), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑁 + 1))})
100	99	eleq1d 2818	. . . . . . . . . . . . . . 15 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸) ∧ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉)) → ({(lastS‘𝑊), 𝑍} ∈ 𝐸 ↔ {((𝑊 ++ ⟨“𝑍”⟩)‘𝑁), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑁 + 1))} ∈ 𝐸))
101	100	biimpa 477	. . . . . . . . . . . . . 14 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸) ∧ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉)) ∧ {(lastS‘𝑊), 𝑍} ∈ 𝐸) → {((𝑊 ++ ⟨“𝑍”⟩)‘𝑁), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑁 + 1))} ∈ 𝐸)
102		simprl1 1218	. . . . . . . . . . . . . . . 16 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸) ∧ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉)) → 𝑁 ∈ ℕ₀)
103	102	adantr 481	. . . . . . . . . . . . . . 15 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸) ∧ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉)) ∧ {(lastS‘𝑊), 𝑍} ∈ 𝐸) → 𝑁 ∈ ℕ₀)
104		fveq2 6888	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑖 = 𝑁 → ((𝑊 ++ ⟨“𝑍”⟩)‘𝑖) = ((𝑊 ++ ⟨“𝑍”⟩)‘𝑁))
105		fvoveq1 7428	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑖 = 𝑁 → ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1)) = ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑁 + 1)))
106	104, 105	preq12d 4744	. . . . . . . . . . . . . . . . 17 ⊢ (𝑖 = 𝑁 → {((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} = {((𝑊 ++ ⟨“𝑍”⟩)‘𝑁), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑁 + 1))})
107	106	eleq1d 2818	. . . . . . . . . . . . . . . 16 ⊢ (𝑖 = 𝑁 → ({((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} ∈ 𝐸 ↔ {((𝑊 ++ ⟨“𝑍”⟩)‘𝑁), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑁 + 1))} ∈ 𝐸))
108	107	ralsng 4676	. . . . . . . . . . . . . . 15 ⊢ (𝑁 ∈ ℕ₀ → (∀𝑖 ∈ {𝑁} {((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} ∈ 𝐸 ↔ {((𝑊 ++ ⟨“𝑍”⟩)‘𝑁), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑁 + 1))} ∈ 𝐸))
109	103, 108	syl 17	. . . . . . . . . . . . . 14 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸) ∧ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉)) ∧ {(lastS‘𝑊), 𝑍} ∈ 𝐸) → (∀𝑖 ∈ {𝑁} {((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} ∈ 𝐸 ↔ {((𝑊 ++ ⟨“𝑍”⟩)‘𝑁), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑁 + 1))} ∈ 𝐸))
110	101, 109	mpbird 256	. . . . . . . . . . . . 13 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸) ∧ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉)) ∧ {(lastS‘𝑊), 𝑍} ∈ 𝐸) → ∀𝑖 ∈ {𝑁} {((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} ∈ 𝐸)
111		ralunb 4190	. . . . . . . . . . . . 13 ⊢ (∀𝑖 ∈ ((0..^𝑁) ∪ {𝑁}){((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} ∈ 𝐸 ↔ (∀𝑖 ∈ (0..^𝑁){((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} ∈ 𝐸 ∧ ∀𝑖 ∈ {𝑁} {((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} ∈ 𝐸))
112	65, 110, 111	sylanbrc 583	. . . . . . . . . . . 12 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸) ∧ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉)) ∧ {(lastS‘𝑊), 𝑍} ∈ 𝐸) → ∀𝑖 ∈ ((0..^𝑁) ∪ {𝑁}){((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} ∈ 𝐸)
113		elnn0uz 12863	. . . . . . . . . . . . . . . 16 ⊢ (𝑁 ∈ ℕ₀ ↔ 𝑁 ∈ (ℤ_≥‘0))
114	102, 113	sylib 217	. . . . . . . . . . . . . . 15 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸) ∧ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉)) → 𝑁 ∈ (ℤ_≥‘0))
115	114	adantr 481	. . . . . . . . . . . . . 14 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸) ∧ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉)) ∧ {(lastS‘𝑊), 𝑍} ∈ 𝐸) → 𝑁 ∈ (ℤ_≥‘0))
116		fzosplitsn 13736	. . . . . . . . . . . . . 14 ⊢ (𝑁 ∈ (ℤ_≥‘0) → (0..^(𝑁 + 1)) = ((0..^𝑁) ∪ {𝑁}))
117	115, 116	syl 17	. . . . . . . . . . . . 13 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸) ∧ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉)) ∧ {(lastS‘𝑊), 𝑍} ∈ 𝐸) → (0..^(𝑁 + 1)) = ((0..^𝑁) ∪ {𝑁}))
118	117	raleqdv 3325	. . . . . . . . . . . 12 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸) ∧ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉)) ∧ {(lastS‘𝑊), 𝑍} ∈ 𝐸) → (∀𝑖 ∈ (0..^(𝑁 + 1)){((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} ∈ 𝐸 ↔ ∀𝑖 ∈ ((0..^𝑁) ∪ {𝑁}){((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} ∈ 𝐸))
119	112, 118	mpbird 256	. . . . . . . . . . 11 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸) ∧ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉)) ∧ {(lastS‘𝑊), 𝑍} ∈ 𝐸) → ∀𝑖 ∈ (0..^(𝑁 + 1)){((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} ∈ 𝐸)
120		ccatws1len 14566	. . . . . . . . . . . . . . . . 17 ⊢ (𝑊 ∈ Word 𝑉 → (♯‘(𝑊 ++ ⟨“𝑍”⟩)) = ((♯‘𝑊) + 1))
121	120	3ad2ant1 1133	. . . . . . . . . . . . . . . 16 ⊢ ((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸) → (♯‘(𝑊 ++ ⟨“𝑍”⟩)) = ((♯‘𝑊) + 1))
122	121	ad2antrr 724	. . . . . . . . . . . . . . 15 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸) ∧ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉)) ∧ {(lastS‘𝑊), 𝑍} ∈ 𝐸) → (♯‘(𝑊 ++ ⟨“𝑍”⟩)) = ((♯‘𝑊) + 1))
123	122	oveq1d 7420	. . . . . . . . . . . . . 14 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸) ∧ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉)) ∧ {(lastS‘𝑊), 𝑍} ∈ 𝐸) → ((♯‘(𝑊 ++ ⟨“𝑍”⟩)) − 1) = (((♯‘𝑊) + 1) − 1))
124		oveq1 7412	. . . . . . . . . . . . . . . . . 18 ⊢ ((♯‘𝑊) = (𝑁 + 1) → ((♯‘𝑊) + 1) = ((𝑁 + 1) + 1))
125	124	oveq1d 7420	. . . . . . . . . . . . . . . . 17 ⊢ ((♯‘𝑊) = (𝑁 + 1) → (((♯‘𝑊) + 1) − 1) = (((𝑁 + 1) + 1) − 1))
126		1cnd 11205	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝑁 ∈ ℕ₀ → 1 ∈ ℂ)
127	80, 126	addcld 11229	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑁 ∈ ℕ₀ → (𝑁 + 1) ∈ ℂ)
128	127, 126	pncand 11568	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑁 ∈ ℕ₀ → (((𝑁 + 1) + 1) − 1) = (𝑁 + 1))
129	128	3ad2ant1 1133	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) → (((𝑁 + 1) + 1) − 1) = (𝑁 + 1))
130	129	adantr 481	. . . . . . . . . . . . . . . . 17 ⊢ (((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉) → (((𝑁 + 1) + 1) − 1) = (𝑁 + 1))
131	125, 130	sylan9eq 2792	. . . . . . . . . . . . . . . 16 ⊢ (((♯‘𝑊) = (𝑁 + 1) ∧ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉)) → (((♯‘𝑊) + 1) − 1) = (𝑁 + 1))
132	131	3ad2antl2 1186	. . . . . . . . . . . . . . 15 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸) ∧ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉)) → (((♯‘𝑊) + 1) − 1) = (𝑁 + 1))
133	132	adantr 481	. . . . . . . . . . . . . 14 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸) ∧ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉)) ∧ {(lastS‘𝑊), 𝑍} ∈ 𝐸) → (((♯‘𝑊) + 1) − 1) = (𝑁 + 1))
134	123, 133	eqtrd 2772	. . . . . . . . . . . . 13 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸) ∧ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉)) ∧ {(lastS‘𝑊), 𝑍} ∈ 𝐸) → ((♯‘(𝑊 ++ ⟨“𝑍”⟩)) − 1) = (𝑁 + 1))
135	134	oveq2d 7421	. . . . . . . . . . . 12 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸) ∧ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉)) ∧ {(lastS‘𝑊), 𝑍} ∈ 𝐸) → (0..^((♯‘(𝑊 ++ ⟨“𝑍”⟩)) − 1)) = (0..^(𝑁 + 1)))
136	135	raleqdv 3325	. . . . . . . . . . 11 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸) ∧ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉)) ∧ {(lastS‘𝑊), 𝑍} ∈ 𝐸) → (∀𝑖 ∈ (0..^((♯‘(𝑊 ++ ⟨“𝑍”⟩)) − 1)){((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} ∈ 𝐸 ↔ ∀𝑖 ∈ (0..^(𝑁 + 1)){((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} ∈ 𝐸))
137	119, 136	mpbird 256	. . . . . . . . . 10 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸) ∧ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉)) ∧ {(lastS‘𝑊), 𝑍} ∈ 𝐸) → ∀𝑖 ∈ (0..^((♯‘(𝑊 ++ ⟨“𝑍”⟩)) − 1)){((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} ∈ 𝐸)
138	137	exp42 436	. . . . . . . . 9 ⊢ ((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸) → ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) → (𝑍 ∈ 𝑉 → ({(lastS‘𝑊), 𝑍} ∈ 𝐸 → ∀𝑖 ∈ (0..^((♯‘(𝑊 ++ ⟨“𝑍”⟩)) − 1)){((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} ∈ 𝐸))))
139	14, 138	syl 17	. . . . . . . 8 ⊢ (𝑊 ∈ (𝑁 WWalksN 𝐺) → ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) → (𝑍 ∈ 𝑉 → ({(lastS‘𝑊), 𝑍} ∈ 𝐸 → ∀𝑖 ∈ (0..^((♯‘(𝑊 ++ ⟨“𝑍”⟩)) − 1)){((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} ∈ 𝐸))))
140	139	imp41 426	. . . . . . 7 ⊢ ((((𝑊 ∈ (𝑁 WWalksN 𝐺) ∧ (𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1))) ∧ 𝑍 ∈ 𝑉) ∧ {(lastS‘𝑊), 𝑍} ∈ 𝐸) → ∀𝑖 ∈ (0..^((♯‘(𝑊 ++ ⟨“𝑍”⟩)) − 1)){((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} ∈ 𝐸)
141	140	adantrr 715	. . . . . 6 ⊢ ((((𝑊 ∈ (𝑁 WWalksN 𝐺) ∧ (𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1))) ∧ 𝑍 ∈ 𝑉) ∧ ({(lastS‘𝑊), 𝑍} ∈ 𝐸 ∧ {𝑍, (𝑊‘0)} ∈ 𝐸)) → ∀𝑖 ∈ (0..^((♯‘(𝑊 ++ ⟨“𝑍”⟩)) − 1)){((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} ∈ 𝐸)
142		lswccats1 14580	. . . . . . . . . . . 12 ⊢ ((𝑊 ∈ Word 𝑉 ∧ 𝑍 ∈ 𝑉) → (lastS‘(𝑊 ++ ⟨“𝑍”⟩)) = 𝑍)
143	7, 142	sylancom 588	. . . . . . . . . . 11 ⊢ (((𝑊 ∈ (𝑁 WWalksN 𝐺) ∧ (𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1))) ∧ 𝑍 ∈ 𝑉) → (lastS‘(𝑊 ++ ⟨“𝑍”⟩)) = 𝑍)
144	68	3ad2ant1 1133	. . . . . . . . . . . . . 14 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) → 0 < (𝑁 + 1))
145	70	3ad2ant3 1135	. . . . . . . . . . . . . 14 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) → (0 < (♯‘𝑊) ↔ 0 < (𝑁 + 1)))
146	144, 145	mpbird 256	. . . . . . . . . . . . 13 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) → 0 < (♯‘𝑊))
147	146	ad2antlr 725	. . . . . . . . . . . 12 ⊢ (((𝑊 ∈ (𝑁 WWalksN 𝐺) ∧ (𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1))) ∧ 𝑍 ∈ 𝑉) → 0 < (♯‘𝑊))
148		ccatfv0 14529	. . . . . . . . . . . 12 ⊢ ((𝑊 ∈ Word 𝑉 ∧ ⟨“𝑍”⟩ ∈ Word 𝑉 ∧ 0 < (♯‘𝑊)) → ((𝑊 ++ ⟨“𝑍”⟩)‘0) = (𝑊‘0))
149	7, 9, 147, 148	syl3anc 1371	. . . . . . . . . . 11 ⊢ (((𝑊 ∈ (𝑁 WWalksN 𝐺) ∧ (𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1))) ∧ 𝑍 ∈ 𝑉) → ((𝑊 ++ ⟨“𝑍”⟩)‘0) = (𝑊‘0))
150	143, 149	preq12d 4744	. . . . . . . . . 10 ⊢ (((𝑊 ∈ (𝑁 WWalksN 𝐺) ∧ (𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1))) ∧ 𝑍 ∈ 𝑉) → {(lastS‘(𝑊 ++ ⟨“𝑍”⟩)), ((𝑊 ++ ⟨“𝑍”⟩)‘0)} = {𝑍, (𝑊‘0)})
151	150	eleq1d 2818	. . . . . . . . 9 ⊢ (((𝑊 ∈ (𝑁 WWalksN 𝐺) ∧ (𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1))) ∧ 𝑍 ∈ 𝑉) → ({(lastS‘(𝑊 ++ ⟨“𝑍”⟩)), ((𝑊 ++ ⟨“𝑍”⟩)‘0)} ∈ 𝐸 ↔ {𝑍, (𝑊‘0)} ∈ 𝐸))
152	151	biimprcd 249	. . . . . . . 8 ⊢ ({𝑍, (𝑊‘0)} ∈ 𝐸 → (((𝑊 ∈ (𝑁 WWalksN 𝐺) ∧ (𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1))) ∧ 𝑍 ∈ 𝑉) → {(lastS‘(𝑊 ++ ⟨“𝑍”⟩)), ((𝑊 ++ ⟨“𝑍”⟩)‘0)} ∈ 𝐸))
153	152	adantl 482	. . . . . . 7 ⊢ (({(lastS‘𝑊), 𝑍} ∈ 𝐸 ∧ {𝑍, (𝑊‘0)} ∈ 𝐸) → (((𝑊 ∈ (𝑁 WWalksN 𝐺) ∧ (𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1))) ∧ 𝑍 ∈ 𝑉) → {(lastS‘(𝑊 ++ ⟨“𝑍”⟩)), ((𝑊 ++ ⟨“𝑍”⟩)‘0)} ∈ 𝐸))
154	153	impcom 408	. . . . . 6 ⊢ ((((𝑊 ∈ (𝑁 WWalksN 𝐺) ∧ (𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1))) ∧ 𝑍 ∈ 𝑉) ∧ ({(lastS‘𝑊), 𝑍} ∈ 𝐸 ∧ {𝑍, (𝑊‘0)} ∈ 𝐸)) → {(lastS‘(𝑊 ++ ⟨“𝑍”⟩)), ((𝑊 ++ ⟨“𝑍”⟩)‘0)} ∈ 𝐸)
155	12, 141, 154	3jca 1128	. . . . 5 ⊢ ((((𝑊 ∈ (𝑁 WWalksN 𝐺) ∧ (𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1))) ∧ 𝑍 ∈ 𝑉) ∧ ({(lastS‘𝑊), 𝑍} ∈ 𝐸 ∧ {𝑍, (𝑊‘0)} ∈ 𝐸)) → ((𝑊 ++ ⟨“𝑍”⟩) ∈ Word 𝑉 ∧ ∀𝑖 ∈ (0..^((♯‘(𝑊 ++ ⟨“𝑍”⟩)) − 1)){((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} ∈ 𝐸 ∧ {(lastS‘(𝑊 ++ ⟨“𝑍”⟩)), ((𝑊 ++ ⟨“𝑍”⟩)‘0)} ∈ 𝐸))
156		ccatws1len 14566	. . . . . . . 8 ⊢ (𝑊 ∈ Word (Vtx‘𝐺) → (♯‘(𝑊 ++ ⟨“𝑍”⟩)) = ((♯‘𝑊) + 1))
157	156	3ad2ant2 1134	. . . . . . 7 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) → (♯‘(𝑊 ++ ⟨“𝑍”⟩)) = ((♯‘𝑊) + 1))
158	124	3ad2ant3 1135	. . . . . . 7 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) → ((♯‘𝑊) + 1) = ((𝑁 + 1) + 1))
159	80, 126, 126	addassd 11232	. . . . . . . . 9 ⊢ (𝑁 ∈ ℕ₀ → ((𝑁 + 1) + 1) = (𝑁 + (1 + 1)))
160		1p1e2 12333	. . . . . . . . . 10 ⊢ (1 + 1) = 2
161	160	oveq2i 7416	. . . . . . . . 9 ⊢ (𝑁 + (1 + 1)) = (𝑁 + 2)
162	159, 161	eqtrdi 2788	. . . . . . . 8 ⊢ (𝑁 ∈ ℕ₀ → ((𝑁 + 1) + 1) = (𝑁 + 2))
163	162	3ad2ant1 1133	. . . . . . 7 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) → ((𝑁 + 1) + 1) = (𝑁 + 2))
164	157, 158, 163	3eqtrd 2776	. . . . . 6 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) → (♯‘(𝑊 ++ ⟨“𝑍”⟩)) = (𝑁 + 2))
165	164	ad3antlr 729	. . . . 5 ⊢ ((((𝑊 ∈ (𝑁 WWalksN 𝐺) ∧ (𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1))) ∧ 𝑍 ∈ 𝑉) ∧ ({(lastS‘𝑊), 𝑍} ∈ 𝐸 ∧ {𝑍, (𝑊‘0)} ∈ 𝐸)) → (♯‘(𝑊 ++ ⟨“𝑍”⟩)) = (𝑁 + 2))
166		2nn 12281	. . . . . . . . 9 ⊢ 2 ∈ ℕ
167		nn0nnaddcl 12499	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ₀ ∧ 2 ∈ ℕ) → (𝑁 + 2) ∈ ℕ)
168	166, 167	mpan2 689	. . . . . . . 8 ⊢ (𝑁 ∈ ℕ₀ → (𝑁 + 2) ∈ ℕ)
169	168	3ad2ant1 1133	. . . . . . 7 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) → (𝑁 + 2) ∈ ℕ)
170	2, 13	isclwwlknx 29278	. . . . . . 7 ⊢ ((𝑁 + 2) ∈ ℕ → ((𝑊 ++ ⟨“𝑍”⟩) ∈ ((𝑁 + 2) ClWWalksN 𝐺) ↔ (((𝑊 ++ ⟨“𝑍”⟩) ∈ Word 𝑉 ∧ ∀𝑖 ∈ (0..^((♯‘(𝑊 ++ ⟨“𝑍”⟩)) − 1)){((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} ∈ 𝐸 ∧ {(lastS‘(𝑊 ++ ⟨“𝑍”⟩)), ((𝑊 ++ ⟨“𝑍”⟩)‘0)} ∈ 𝐸) ∧ (♯‘(𝑊 ++ ⟨“𝑍”⟩)) = (𝑁 + 2))))
171	169, 170	syl 17	. . . . . 6 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) → ((𝑊 ++ ⟨“𝑍”⟩) ∈ ((𝑁 + 2) ClWWalksN 𝐺) ↔ (((𝑊 ++ ⟨“𝑍”⟩) ∈ Word 𝑉 ∧ ∀𝑖 ∈ (0..^((♯‘(𝑊 ++ ⟨“𝑍”⟩)) − 1)){((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} ∈ 𝐸 ∧ {(lastS‘(𝑊 ++ ⟨“𝑍”⟩)), ((𝑊 ++ ⟨“𝑍”⟩)‘0)} ∈ 𝐸) ∧ (♯‘(𝑊 ++ ⟨“𝑍”⟩)) = (𝑁 + 2))))
172	171	ad3antlr 729	. . . . 5 ⊢ ((((𝑊 ∈ (𝑁 WWalksN 𝐺) ∧ (𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1))) ∧ 𝑍 ∈ 𝑉) ∧ ({(lastS‘𝑊), 𝑍} ∈ 𝐸 ∧ {𝑍, (𝑊‘0)} ∈ 𝐸)) → ((𝑊 ++ ⟨“𝑍”⟩) ∈ ((𝑁 + 2) ClWWalksN 𝐺) ↔ (((𝑊 ++ ⟨“𝑍”⟩) ∈ Word 𝑉 ∧ ∀𝑖 ∈ (0..^((♯‘(𝑊 ++ ⟨“𝑍”⟩)) − 1)){((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} ∈ 𝐸 ∧ {(lastS‘(𝑊 ++ ⟨“𝑍”⟩)), ((𝑊 ++ ⟨“𝑍”⟩)‘0)} ∈ 𝐸) ∧ (♯‘(𝑊 ++ ⟨“𝑍”⟩)) = (𝑁 + 2))))
173	155, 165, 172	mpbir2and 711	. . . 4 ⊢ ((((𝑊 ∈ (𝑁 WWalksN 𝐺) ∧ (𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1))) ∧ 𝑍 ∈ 𝑉) ∧ ({(lastS‘𝑊), 𝑍} ∈ 𝐸 ∧ {𝑍, (𝑊‘0)} ∈ 𝐸)) → (𝑊 ++ ⟨“𝑍”⟩) ∈ ((𝑁 + 2) ClWWalksN 𝐺))
174	173	exp31 420	. . 3 ⊢ ((𝑊 ∈ (𝑁 WWalksN 𝐺) ∧ (𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1))) → (𝑍 ∈ 𝑉 → (({(lastS‘𝑊), 𝑍} ∈ 𝐸 ∧ {𝑍, (𝑊‘0)} ∈ 𝐸) → (𝑊 ++ ⟨“𝑍”⟩) ∈ ((𝑁 + 2) ClWWalksN 𝐺))))
175	1, 174	mpdan 685	. 2 ⊢ (𝑊 ∈ (𝑁 WWalksN 𝐺) → (𝑍 ∈ 𝑉 → (({(lastS‘𝑊), 𝑍} ∈ 𝐸 ∧ {𝑍, (𝑊‘0)} ∈ 𝐸) → (𝑊 ++ ⟨“𝑍”⟩) ∈ ((𝑁 + 2) ClWWalksN 𝐺))))
176	175	imp 407	1 ⊢ ((𝑊 ∈ (𝑁 WWalksN 𝐺) ∧ 𝑍 ∈ 𝑉) → (({(lastS‘𝑊), 𝑍} ∈ 𝐸 ∧ {𝑍, (𝑊‘0)} ∈ 𝐸) → (𝑊 ++ ⟨“𝑍”⟩) ∈ ((𝑁 + 2) ClWWalksN 𝐺)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 ∧ w3a 1087 = wceq 1541 ∈ wcel 2106 ≠ wne 2940 ∀wral 3061 ∪ cun 3945 ∅c0 4321 {csn 4627 {cpr 4629 class class class wbr 5147 ‘cfv 6540 (class class class)co 7405 ℂcc 11104 ℝcr 11105 0cc0 11106 1c1 11107 + caddc 11109 < clt 11244 − cmin 11440 ℕcn 12208 2c2 12263 ℕ₀cn0 12468 ℤ_≥cuz 12818 ..^cfzo 13623 ♯chash 14286 Word cword 14460 lastSclsw 14508 ++ cconcat 14516 ⟨“cs1 14541 Vtxcvtx 28245 Edgcedg 28296 WWalksN cwwlksn 29069 ClWWalksN cclwwlkn 29266

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 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 2703 ax-rep 5284 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7721 ax-cnex 11162 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-mulcom 11170 ax-addass 11171 ax-mulass 11172 ax-distr 11173 ax-i2m1 11174 ax-1ne0 11175 ax-1rid 11176 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 ax-pre-ltadd 11182 ax-pre-mulgt0 11183

This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-reu 3377 df-rab 3433 df-v 3476 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 6297 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6492 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-om 7852 df-1st 7971 df-2nd 7972 df-frecs 8262 df-wrecs 8293 df-recs 8367 df-rdg 8406 df-1o 8462 df-er 8699 df-map 8818 df-en 8936 df-dom 8937 df-sdom 8938 df-fin 8939 df-card 9930 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-sub 11442 df-neg 11443 df-nn 12209 df-2 12271 df-n0 12469 df-xnn0 12541 df-z 12555 df-uz 12819 df-rp 12971 df-fz 13481 df-fzo 13624 df-hash 14287 df-word 14461 df-lsw 14509 df-concat 14517 df-s1 14542 df-wwlks 29073 df-wwlksn 29074 df-clwwlk 29224 df-clwwlkn 29267

This theorem is referenced by: numclwwlk2lem1 29618

W3C validator