wwlksext2clwwlk - Metamath Proof Explorer

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Theorem wwlksext2clwwlk 29854

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 29642	. . 3 ⊢ (𝑊 ∈ (𝑁 WWalksN 𝐺) → (𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)))
2		clwwlkext2edg.v	. . . . . . . . . . . . 13 ⊢ 𝑉 = (Vtx‘𝐺)
3	2	wrdeqi 14511	. . . . . . . . . . . 12 ⊢ Word 𝑉 = Word (Vtx‘𝐺)
4	3	eleq2i 2820	. . . . . . . . . . 11 ⊢ (𝑊 ∈ Word 𝑉 ↔ 𝑊 ∈ Word (Vtx‘𝐺))
5	4	biimpri 227	. . . . . . . . . 10 ⊢ (𝑊 ∈ Word (Vtx‘𝐺) → 𝑊 ∈ Word 𝑉)
6	5	3ad2ant2 1132	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) → 𝑊 ∈ Word 𝑉)
7	6	ad2antlr 726	. . . . . . . 8 ⊢ (((𝑊 ∈ (𝑁 WWalksN 𝐺) ∧ (𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1))) ∧ 𝑍 ∈ 𝑉) → 𝑊 ∈ Word 𝑉)
8		s1cl 14576	. . . . . . . . 9 ⊢ (𝑍 ∈ 𝑉 → ⟨“𝑍”⟩ ∈ Word 𝑉)
9	8	adantl 481	. . . . . . . 8 ⊢ (((𝑊 ∈ (𝑁 WWalksN 𝐺) ∧ (𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1))) ∧ 𝑍 ∈ 𝑉) → ⟨“𝑍”⟩ ∈ Word 𝑉)
10		ccatcl 14548	. . . . . . . 8 ⊢ ((𝑊 ∈ Word 𝑉 ∧ ⟨“𝑍”⟩ ∈ Word 𝑉) → (𝑊 ++ ⟨“𝑍”⟩) ∈ Word 𝑉)
11	7, 9, 10	syl2anc 583	. . . . . . 7 ⊢ (((𝑊 ∈ (𝑁 WWalksN 𝐺) ∧ (𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1))) ∧ 𝑍 ∈ 𝑉) → (𝑊 ++ ⟨“𝑍”⟩) ∈ Word 𝑉)
12	11	adantr 480	. . . . . 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 29641	. . . . . . . . 9 ⊢ (𝑊 ∈ (𝑁 WWalksN 𝐺) → (𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸))
15		simplll 774	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) ∧ 𝑖 ∈ (0..^𝑁)) → 𝑊 ∈ Word 𝑉)
16	8	adantr 480	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 ⊢ ((𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀) → ⟨“𝑍”⟩ ∈ Word 𝑉)
17	16	ad2antlr 726	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) ∧ 𝑖 ∈ (0..^𝑁)) → ⟨“𝑍”⟩ ∈ Word 𝑉)
18		elfzo0 13697	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 ⊢ (𝑖 ∈ (0..^𝑁) ↔ (𝑖 ∈ ℕ₀ ∧ 𝑁 ∈ ℕ ∧ 𝑖 < 𝑁))
19		simp1 1134	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 ⊢ ((𝑖 ∈ ℕ₀ ∧ 𝑁 ∈ ℕ ∧ 𝑖 < 𝑁) → 𝑖 ∈ ℕ₀)
20		peano2nn 12246	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 ⊢ (𝑁 ∈ ℕ → (𝑁 + 1) ∈ ℕ)
21	20	3ad2ant2 1132	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 ⊢ ((𝑖 ∈ ℕ₀ ∧ 𝑁 ∈ ℕ ∧ 𝑖 < 𝑁) → (𝑁 + 1) ∈ ℕ)
22		nn0re 12503	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 ⊢ (𝑖 ∈ ℕ₀ → 𝑖 ∈ ℝ)
23	22	3ad2ant1 1131	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 ⊢ ((𝑖 ∈ ℕ₀ ∧ 𝑁 ∈ ℕ ∧ 𝑖 < 𝑁) → 𝑖 ∈ ℝ)
24		nnre 12241	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ ℝ)
25	24	3ad2ant2 1132	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 ⊢ ((𝑖 ∈ ℕ₀ ∧ 𝑁 ∈ ℕ ∧ 𝑖 < 𝑁) → 𝑁 ∈ ℝ)
26		peano2re 11409	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 ⊢ (𝑁 ∈ ℝ → (𝑁 + 1) ∈ ℝ)
27	24, 26	syl 17	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 ⊢ (𝑁 ∈ ℕ → (𝑁 + 1) ∈ ℝ)
28	27	3ad2ant2 1132	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 ⊢ ((𝑖 ∈ ℕ₀ ∧ 𝑁 ∈ ℕ ∧ 𝑖 < 𝑁) → (𝑁 + 1) ∈ ℝ)
29		simp3 1136	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 ⊢ ((𝑖 ∈ ℕ₀ ∧ 𝑁 ∈ ℕ ∧ 𝑖 < 𝑁) → 𝑖 < 𝑁)
30	24	ltp1d 12166	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 ⊢ (𝑁 ∈ ℕ → 𝑁 < (𝑁 + 1))
31	30	3ad2ant2 1132	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 ⊢ ((𝑖 ∈ ℕ₀ ∧ 𝑁 ∈ ℕ ∧ 𝑖 < 𝑁) → 𝑁 < (𝑁 + 1))
32	23, 25, 28, 29, 31	lttrd 11397	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 ⊢ ((𝑖 ∈ ℕ₀ ∧ 𝑁 ∈ ℕ ∧ 𝑖 < 𝑁) → 𝑖 < (𝑁 + 1))
33		elfzo0 13697	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 ⊢ (𝑖 ∈ (0..^(𝑁 + 1)) ↔ (𝑖 ∈ ℕ₀ ∧ (𝑁 + 1) ∈ ℕ ∧ 𝑖 < (𝑁 + 1)))
34	19, 21, 32, 33	syl3anbrc 1341	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 481	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) ∧ 𝑖 ∈ (0..^𝑁)) → 𝑖 ∈ (0..^(𝑁 + 1)))
37		oveq2 7422	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 ⊢ ((♯‘𝑊) = (𝑁 + 1) → (0..^(♯‘𝑊)) = (0..^(𝑁 + 1)))
38	37	adantl 481	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 ⊢ ((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) → (0..^(♯‘𝑊)) = (0..^(𝑁 + 1)))
39	38	eleq2d 2814	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 ⊢ ((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) → (𝑖 ∈ (0..^(♯‘𝑊)) ↔ 𝑖 ∈ (0..^(𝑁 + 1))))
40	39	ad2antrr 725	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 257	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) ∧ 𝑖 ∈ (0..^𝑁)) → 𝑖 ∈ (0..^(♯‘𝑊)))
42		ccatval1 14551	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ ((𝑊 ∈ Word 𝑉 ∧ ⟨“𝑍”⟩ ∈ Word 𝑉 ∧ 𝑖 ∈ (0..^(♯‘𝑊))) → ((𝑊 ++ ⟨“𝑍”⟩)‘𝑖) = (𝑊‘𝑖))
43	15, 17, 41, 42	syl3anc 1369	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) ∧ 𝑖 ∈ (0..^𝑁)) → ((𝑊 ++ ⟨“𝑍”⟩)‘𝑖) = (𝑊‘𝑖))
44		fzonn0p1p1 13735	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 ⊢ (𝑖 ∈ (0..^𝑁) → (𝑖 + 1) ∈ (0..^(𝑁 + 1)))
45	44	adantl 481	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) ∧ 𝑖 ∈ (0..^𝑁)) → (𝑖 + 1) ∈ (0..^(𝑁 + 1)))
46	37	eleq2d 2814	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 ⊢ ((♯‘𝑊) = (𝑁 + 1) → ((𝑖 + 1) ∈ (0..^(♯‘𝑊)) ↔ (𝑖 + 1) ∈ (0..^(𝑁 + 1))))
47	46	ad3antlr 730	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 257	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ ((((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) ∧ 𝑖 ∈ (0..^𝑁)) → (𝑖 + 1) ∈ (0..^(♯‘𝑊)))
49		ccatval1 14551	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ ((𝑊 ∈ Word 𝑉 ∧ ⟨“𝑍”⟩ ∈ Word 𝑉 ∧ (𝑖 + 1) ∈ (0..^(♯‘𝑊))) → ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1)) = (𝑊‘(𝑖 + 1)))
50	15, 17, 48, 49	syl3anc 1369	. . . . . . . . . . . . . . . . . . . . . . . . . . . 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 4741	. . . . . . . . . . . . . . . . . . . . . . . . . . 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 412	. . . . . . . . . . . . . . . . . . . . . . . . . 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 413	. . . . . . . . . . . . . . . . . . . . . . . . 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 413	. . . . . . . . . . . . . . . . . . . . . . . 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 1131	. . . . . . . . . . . . . . . . . . . . . . 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 406	. . . . . . . . . . . . . . . . . . . . . 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 414	. . . . . . . . . . . . . . . . . . . . 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 1345	. . . . . . . . . . . . . . . . . . . 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 2813	. . . . . . . . . . . . . . . . . . 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 3170	. . . . . . . . . . . . . . . . . 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 1117	. . . . . . . . . . . . . . . 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 1345	. . . . . . . . . . . . . 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 480	. . . . . . . . . . . . 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 766	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → 𝑊 ∈ Word 𝑉)
67	8	ad2antrl 727	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → ⟨“𝑍”⟩ ∈ Word 𝑉)
68		nn0p1gt0 12523	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ (𝑁 ∈ ℕ₀ → 0 < (𝑁 + 1))
69	68	ad2antll 728	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → 0 < (𝑁 + 1))
70		breq2 5146	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ ((♯‘𝑊) = (𝑁 + 1) → (0 < (♯‘𝑊) ↔ 0 < (𝑁 + 1)))
71	70	ad2antlr 726	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → (0 < (♯‘𝑊) ↔ 0 < (𝑁 + 1)))
72	69, 71	mpbird 257	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → 0 < (♯‘𝑊))
73		hashneq0 14347	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ (𝑊 ∈ Word 𝑉 → (0 < (♯‘𝑊) ↔ 𝑊 ≠ ∅))
74	73	ad2antrr 725	. . . . . . . . . . . . . . . . . . . . . . . . . . 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 14558	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((𝑊 ∈ Word 𝑉 ∧ ⟨“𝑍”⟩ ∈ Word 𝑉 ∧ 𝑊 ≠ ∅) → ((𝑊 ++ ⟨“𝑍”⟩)‘((♯‘𝑊) − 1)) = (lastS‘𝑊))
77	66, 67, 75, 76	syl3anc 1369	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → ((𝑊 ++ ⟨“𝑍”⟩)‘((♯‘𝑊) − 1)) = (lastS‘𝑊))
78		oveq1 7421	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ ((♯‘𝑊) = (𝑁 + 1) → ((♯‘𝑊) − 1) = ((𝑁 + 1) − 1))
79	78	ad2antlr 726	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → ((♯‘𝑊) − 1) = ((𝑁 + 1) − 1))
80		nn0cn 12504	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ (𝑁 ∈ ℕ₀ → 𝑁 ∈ ℂ)
81	80	ad2antll 728	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → 𝑁 ∈ ℂ)
82		pncan1 11660	. . . . . . . . . . . . . . . . . . . . . . . . . . . 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 2767	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → ((♯‘𝑊) − 1) = 𝑁)
85	84	fveq2d 6895	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → ((𝑊 ++ ⟨“𝑍”⟩)‘((♯‘𝑊) − 1)) = ((𝑊 ++ ⟨“𝑍”⟩)‘𝑁))
86	77, 85	eqtr3d 2769	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → (lastS‘𝑊) = ((𝑊 ++ ⟨“𝑍”⟩)‘𝑁))
87		ccatws1ls 14607	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((𝑊 ∈ Word 𝑉 ∧ 𝑍 ∈ 𝑉) → ((𝑊 ++ ⟨“𝑍”⟩)‘(♯‘𝑊)) = 𝑍)
88	87	ad2ant2r 746	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → ((𝑊 ++ ⟨“𝑍”⟩)‘(♯‘𝑊)) = 𝑍)
89		fveq2 6891	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((♯‘𝑊) = (𝑁 + 1) → ((𝑊 ++ ⟨“𝑍”⟩)‘(♯‘𝑊)) = ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑁 + 1)))
90	89	ad2antlr 726	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → ((𝑊 ++ ⟨“𝑍”⟩)‘(♯‘𝑊)) = ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑁 + 1)))
91	88, 90	eqtr3d 2769	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → 𝑍 = ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑁 + 1)))
92	86, 91	preq12d 4741	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ (𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀)) → {(lastS‘𝑊), 𝑍} = {((𝑊 ++ ⟨“𝑍”⟩)‘𝑁), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑁 + 1))})
93	92	expcom 413	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((𝑍 ∈ 𝑉 ∧ 𝑁 ∈ ℕ₀) → ((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) → {(lastS‘𝑊), 𝑍} = {((𝑊 ++ ⟨“𝑍”⟩)‘𝑁), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑁 + 1))}))
94	93	expcom 413	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝑁 ∈ ℕ₀ → (𝑍 ∈ 𝑉 → ((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1)) → {(lastS‘𝑊), 𝑍} = {((𝑊 ++ ⟨“𝑍”⟩)‘𝑁), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑁 + 1))})))
95	94	3ad2ant1 1131	. . . . . . . . . . . . . . . . . . . 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 406	. . . . . . . . . . . . . . . . . . 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 1130	. . . . . . . . . . . . . . . . 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 406	. . . . . . . . . . . . . . . 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 2813	. . . . . . . . . . . . . . 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 476	. . . . . . . . . . . . . 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 1216	. . . . . . . . . . . . . . . 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 480	. . . . . . . . . . . . . . 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 6891	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑖 = 𝑁 → ((𝑊 ++ ⟨“𝑍”⟩)‘𝑖) = ((𝑊 ++ ⟨“𝑍”⟩)‘𝑁))
105		fvoveq1 7437	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑖 = 𝑁 → ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1)) = ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑁 + 1)))
106	104, 105	preq12d 4741	. . . . . . . . . . . . . . . . 17 ⊢ (𝑖 = 𝑁 → {((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} = {((𝑊 ++ ⟨“𝑍”⟩)‘𝑁), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑁 + 1))})
107	106	eleq1d 2813	. . . . . . . . . . . . . . . 16 ⊢ (𝑖 = 𝑁 → ({((𝑊 ++ ⟨“𝑍”⟩)‘𝑖), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑖 + 1))} ∈ 𝐸 ↔ {((𝑊 ++ ⟨“𝑍”⟩)‘𝑁), ((𝑊 ++ ⟨“𝑍”⟩)‘(𝑁 + 1))} ∈ 𝐸))
108	107	ralsng 4673	. . . . . . . . . . . . . . 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 257	. . . . . . . . . . . . 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 4187	. . . . . . . . . . . . 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 582	. . . . . . . . . . . 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 12889	. . . . . . . . . . . . . . . 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 480	. . . . . . . . . . . . . 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 13764	. . . . . . . . . . . . . 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 3320	. . . . . . . . . . . 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 257	. . . . . . . . . . 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 14594	. . . . . . . . . . . . . . . . 17 ⊢ (𝑊 ∈ Word 𝑉 → (♯‘(𝑊 ++ ⟨“𝑍”⟩)) = ((♯‘𝑊) + 1))
121	120	3ad2ant1 1131	. . . . . . . . . . . . . . . 16 ⊢ ((𝑊 ∈ Word 𝑉 ∧ (♯‘𝑊) = (𝑁 + 1) ∧ ∀𝑖 ∈ (0..^𝑁){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ 𝐸) → (♯‘(𝑊 ++ ⟨“𝑍”⟩)) = ((♯‘𝑊) + 1))
122	121	ad2antrr 725	. . . . . . . . . . . . . . 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 7429	. . . . . . . . . . . . . 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 7421	. . . . . . . . . . . . . . . . . 18 ⊢ ((♯‘𝑊) = (𝑁 + 1) → ((♯‘𝑊) + 1) = ((𝑁 + 1) + 1))
125	124	oveq1d 7429	. . . . . . . . . . . . . . . . 17 ⊢ ((♯‘𝑊) = (𝑁 + 1) → (((♯‘𝑊) + 1) − 1) = (((𝑁 + 1) + 1) − 1))
126		1cnd 11231	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝑁 ∈ ℕ₀ → 1 ∈ ℂ)
127	80, 126	addcld 11255	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑁 ∈ ℕ₀ → (𝑁 + 1) ∈ ℂ)
128	127, 126	pncand 11594	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑁 ∈ ℕ₀ → (((𝑁 + 1) + 1) − 1) = (𝑁 + 1))
129	128	3ad2ant1 1131	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) → (((𝑁 + 1) + 1) − 1) = (𝑁 + 1))
130	129	adantr 480	. . . . . . . . . . . . . . . . 17 ⊢ (((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉) → (((𝑁 + 1) + 1) − 1) = (𝑁 + 1))
131	125, 130	sylan9eq 2787	. . . . . . . . . . . . . . . 16 ⊢ (((♯‘𝑊) = (𝑁 + 1) ∧ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) ∧ 𝑍 ∈ 𝑉)) → (((♯‘𝑊) + 1) − 1) = (𝑁 + 1))
132	131	3ad2antl2 1184	. . . . . . . . . . . . . . 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 480	. . . . . . . . . . . . . 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 2767	. . . . . . . . . . . . 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 7430	. . . . . . . . . . . 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 3320	. . . . . . . . . . 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 257	. . . . . . . . . 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 435	. . . . . . . . 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 425	. . . . . . 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 716	. . . . . 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 14608	. . . . . . . . . . . 12 ⊢ ((𝑊 ∈ Word 𝑉 ∧ 𝑍 ∈ 𝑉) → (lastS‘(𝑊 ++ ⟨“𝑍”⟩)) = 𝑍)
143	7, 142	sylancom 587	. . . . . . . . . . 11 ⊢ (((𝑊 ∈ (𝑁 WWalksN 𝐺) ∧ (𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1))) ∧ 𝑍 ∈ 𝑉) → (lastS‘(𝑊 ++ ⟨“𝑍”⟩)) = 𝑍)
144	68	3ad2ant1 1131	. . . . . . . . . . . . . 14 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) → 0 < (𝑁 + 1))
145	70	3ad2ant3 1133	. . . . . . . . . . . . . 14 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) → (0 < (♯‘𝑊) ↔ 0 < (𝑁 + 1)))
146	144, 145	mpbird 257	. . . . . . . . . . . . 13 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) → 0 < (♯‘𝑊))
147	146	ad2antlr 726	. . . . . . . . . . . 12 ⊢ (((𝑊 ∈ (𝑁 WWalksN 𝐺) ∧ (𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1))) ∧ 𝑍 ∈ 𝑉) → 0 < (♯‘𝑊))
148		ccatfv0 14557	. . . . . . . . . . . 12 ⊢ ((𝑊 ∈ Word 𝑉 ∧ ⟨“𝑍”⟩ ∈ Word 𝑉 ∧ 0 < (♯‘𝑊)) → ((𝑊 ++ ⟨“𝑍”⟩)‘0) = (𝑊‘0))
149	7, 9, 147, 148	syl3anc 1369	. . . . . . . . . . 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 4741	. . . . . . . . . 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 2813	. . . . . . . . 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 481	. . . . . . 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 407	. . . . . 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 1126	. . . . 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 14594	. . . . . . . 8 ⊢ (𝑊 ∈ Word (Vtx‘𝐺) → (♯‘(𝑊 ++ ⟨“𝑍”⟩)) = ((♯‘𝑊) + 1))
157	156	3ad2ant2 1132	. . . . . . 7 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) → (♯‘(𝑊 ++ ⟨“𝑍”⟩)) = ((♯‘𝑊) + 1))
158	124	3ad2ant3 1133	. . . . . . 7 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) → ((♯‘𝑊) + 1) = ((𝑁 + 1) + 1))
159	80, 126, 126	addassd 11258	. . . . . . . . 9 ⊢ (𝑁 ∈ ℕ₀ → ((𝑁 + 1) + 1) = (𝑁 + (1 + 1)))
160		1p1e2 12359	. . . . . . . . . 10 ⊢ (1 + 1) = 2
161	160	oveq2i 7425	. . . . . . . . 9 ⊢ (𝑁 + (1 + 1)) = (𝑁 + 2)
162	159, 161	eqtrdi 2783	. . . . . . . 8 ⊢ (𝑁 ∈ ℕ₀ → ((𝑁 + 1) + 1) = (𝑁 + 2))
163	162	3ad2ant1 1131	. . . . . . 7 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) → ((𝑁 + 1) + 1) = (𝑁 + 2))
164	157, 158, 163	3eqtrd 2771	. . . . . 6 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) → (♯‘(𝑊 ++ ⟨“𝑍”⟩)) = (𝑁 + 2))
165	164	ad3antlr 730	. . . . 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 12307	. . . . . . . . 9 ⊢ 2 ∈ ℕ
167		nn0nnaddcl 12525	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ₀ ∧ 2 ∈ ℕ) → (𝑁 + 2) ∈ ℕ)
168	166, 167	mpan2 690	. . . . . . . 8 ⊢ (𝑁 ∈ ℕ₀ → (𝑁 + 2) ∈ ℕ)
169	168	3ad2ant1 1131	. . . . . . 7 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑊 ∈ Word (Vtx‘𝐺) ∧ (♯‘𝑊) = (𝑁 + 1)) → (𝑁 + 2) ∈ ℕ)
170	2, 13	isclwwlknx 29833	. . . . . . 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 730	. . . . 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 712	. . . 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 419	. . 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 686	. 2 ⊢ (𝑊 ∈ (𝑁 WWalksN 𝐺) → (𝑍 ∈ 𝑉 → (({(lastS‘𝑊), 𝑍} ∈ 𝐸 ∧ {𝑍, (𝑊‘0)} ∈ 𝐸) → (𝑊 ++ ⟨“𝑍”⟩) ∈ ((𝑁 + 2) ClWWalksN 𝐺))))
176	175	imp 406	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 395 ∧ w3a 1085 = wceq 1534 ∈ wcel 2099 ≠ wne 2935 ∀wral 3056 ∪ cun 3942 ∅c0 4318 {csn 4624 {cpr 4626 class class class wbr 5142 ‘cfv 6542 (class class class)co 7414 ℂcc 11128 ℝcr 11129 0cc0 11130 1c1 11131 + caddc 11133 < clt 11270 − cmin 11466 ℕcn 12234 2c2 12289 ℕ₀cn0 12494 ℤ_≥cuz 12844 ..^cfzo 13651 ♯chash 14313 Word cword 14488 lastSclsw 14536 ++ cconcat 14544 ⟨“cs1 14569 Vtxcvtx 28796 Edgcedg 28847 WWalksN cwwlksn 29624 ClWWalksN cclwwlkn 29821

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1790 ax-4 1804 ax-5 1906 ax-6 1964 ax-7 2004 ax-8 2101 ax-9 2109 ax-10 2130 ax-11 2147 ax-12 2164 ax-ext 2698 ax-rep 5279 ax-sep 5293 ax-nul 5300 ax-pow 5359 ax-pr 5423 ax-un 7734 ax-cnex 11186 ax-resscn 11187 ax-1cn 11188 ax-icn 11189 ax-addcl 11190 ax-addrcl 11191 ax-mulcl 11192 ax-mulrcl 11193 ax-mulcom 11194 ax-addass 11195 ax-mulass 11196 ax-distr 11197 ax-i2m1 11198 ax-1ne0 11199 ax-1rid 11200 ax-rnegex 11201 ax-rrecex 11202 ax-cnre 11203 ax-pre-lttri 11204 ax-pre-lttrn 11205 ax-pre-ltadd 11206 ax-pre-mulgt0 11207

This theorem depends on definitions: df-bi 206 df-an 396 df-or 847 df-3or 1086 df-3an 1087 df-tru 1537 df-fal 1547 df-ex 1775 df-nf 1779 df-sb 2061 df-mo 2529 df-eu 2558 df-clab 2705 df-cleq 2719 df-clel 2805 df-nfc 2880 df-ne 2936 df-nel 3042 df-ral 3057 df-rex 3066 df-reu 3372 df-rab 3428 df-v 3471 df-sbc 3775 df-csb 3890 df-dif 3947 df-un 3949 df-in 3951 df-ss 3961 df-pss 3963 df-nul 4319 df-if 4525 df-pw 4600 df-sn 4625 df-pr 4627 df-op 4631 df-uni 4904 df-int 4945 df-iun 4993 df-br 5143 df-opab 5205 df-mpt 5226 df-tr 5260 df-id 5570 df-eprel 5576 df-po 5584 df-so 5585 df-fr 5627 df-we 5629 df-xp 5678 df-rel 5679 df-cnv 5680 df-co 5681 df-dm 5682 df-rn 5683 df-res 5684 df-ima 5685 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 7370 df-ov 7417 df-oprab 7418 df-mpo 7419 df-om 7865 df-1st 7987 df-2nd 7988 df-frecs 8280 df-wrecs 8311 df-recs 8385 df-rdg 8424 df-1o 8480 df-er 8718 df-map 8838 df-en 8956 df-dom 8957 df-sdom 8958 df-fin 8959 df-card 9954 df-pnf 11272 df-mnf 11273 df-xr 11274 df-ltxr 11275 df-le 11276 df-sub 11468 df-neg 11469 df-nn 12235 df-2 12297 df-n0 12495 df-xnn0 12567 df-z 12581 df-uz 12845 df-rp 12999 df-fz 13509 df-fzo 13652 df-hash 14314 df-word 14489 df-lsw 14537 df-concat 14545 df-s1 14570 df-wwlks 29628 df-wwlksn 29629 df-clwwlk 29779 df-clwwlkn 29822

This theorem is referenced by: numclwwlk2lem1 30173

W3C validator