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Theorem clwlkclwwlklem3 29254

Description: Lemma 3 for clwlkclwwlk 29255. (Contributed by Alexander van der Vekens, 22-Jun-2018.) (Revised by AV, 11-Apr-2021.)

**Assertion**
Ref	Expression
clwlkclwwlklem3	⊢ ((𝐸:dom 𝐸–1-1→𝑅 ∧ 𝑃 ∈ Word 𝑉 ∧ 2 ≤ (♯‘𝑃)) → (∃𝑓((𝑓 ∈ Word dom 𝐸 ∧ 𝑃:(0...(♯‘𝑓))⟶𝑉 ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))(𝐸‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}) ∧ (𝑃‘0) = (𝑃‘(♯‘𝑓))) ↔ ((lastS‘𝑃) = (𝑃‘0) ∧ (∀𝑖 ∈ (0..^((((♯‘𝑃) − 1) − 0) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑃) − 2)), (𝑃‘0)} ∈ ran 𝐸))))

Distinct variable groups: 𝑓,𝐸,𝑖 𝑃,𝑓,𝑖 𝑅,𝑓,𝑖 𝑓,𝑉,𝑖

**Proof of Theorem clwlkclwwlklem3**
Step	Hyp	Ref	Expression
1		simp1 1137	. . . . . . 7 ⊢ ((𝐸:dom 𝐸–1-1→𝑅 ∧ 𝑃 ∈ Word 𝑉 ∧ 2 ≤ (♯‘𝑃)) → 𝐸:dom 𝐸–1-1→𝑅)
2		simp1 1137	. . . . . . . 8 ⊢ ((𝑓 ∈ Word dom 𝐸 ∧ 𝑃:(0...(♯‘𝑓))⟶𝑉 ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))(𝐸‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}) → 𝑓 ∈ Word dom 𝐸)
3	2	adantr 482	. . . . . . 7 ⊢ (((𝑓 ∈ Word dom 𝐸 ∧ 𝑃:(0...(♯‘𝑓))⟶𝑉 ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))(𝐸‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}) ∧ (𝑃‘0) = (𝑃‘(♯‘𝑓))) → 𝑓 ∈ Word dom 𝐸)
4	1, 3	anim12i 614	. . . . . 6 ⊢ (((𝐸:dom 𝐸–1-1→𝑅 ∧ 𝑃 ∈ Word 𝑉 ∧ 2 ≤ (♯‘𝑃)) ∧ ((𝑓 ∈ Word dom 𝐸 ∧ 𝑃:(0...(♯‘𝑓))⟶𝑉 ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))(𝐸‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}) ∧ (𝑃‘0) = (𝑃‘(♯‘𝑓)))) → (𝐸:dom 𝐸–1-1→𝑅 ∧ 𝑓 ∈ Word dom 𝐸))
5		simp3 1139	. . . . . . 7 ⊢ ((𝐸:dom 𝐸–1-1→𝑅 ∧ 𝑃 ∈ Word 𝑉 ∧ 2 ≤ (♯‘𝑃)) → 2 ≤ (♯‘𝑃))
6		simpl2 1193	. . . . . . 7 ⊢ (((𝑓 ∈ Word dom 𝐸 ∧ 𝑃:(0...(♯‘𝑓))⟶𝑉 ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))(𝐸‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}) ∧ (𝑃‘0) = (𝑃‘(♯‘𝑓))) → 𝑃:(0...(♯‘𝑓))⟶𝑉)
7	5, 6	anim12ci 615	. . . . . 6 ⊢ (((𝐸:dom 𝐸–1-1→𝑅 ∧ 𝑃 ∈ Word 𝑉 ∧ 2 ≤ (♯‘𝑃)) ∧ ((𝑓 ∈ Word dom 𝐸 ∧ 𝑃:(0...(♯‘𝑓))⟶𝑉 ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))(𝐸‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}) ∧ (𝑃‘0) = (𝑃‘(♯‘𝑓)))) → (𝑃:(0...(♯‘𝑓))⟶𝑉 ∧ 2 ≤ (♯‘𝑃)))
8		simp3 1139	. . . . . . . 8 ⊢ ((𝑓 ∈ Word dom 𝐸 ∧ 𝑃:(0...(♯‘𝑓))⟶𝑉 ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))(𝐸‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}) → ∀𝑖 ∈ (0..^(♯‘𝑓))(𝐸‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))})
9	8	anim1i 616	. . . . . . 7 ⊢ (((𝑓 ∈ Word dom 𝐸 ∧ 𝑃:(0...(♯‘𝑓))⟶𝑉 ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))(𝐸‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}) ∧ (𝑃‘0) = (𝑃‘(♯‘𝑓))) → (∀𝑖 ∈ (0..^(♯‘𝑓))(𝐸‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∧ (𝑃‘0) = (𝑃‘(♯‘𝑓))))
10	9	adantl 483	. . . . . 6 ⊢ (((𝐸:dom 𝐸–1-1→𝑅 ∧ 𝑃 ∈ Word 𝑉 ∧ 2 ≤ (♯‘𝑃)) ∧ ((𝑓 ∈ Word dom 𝐸 ∧ 𝑃:(0...(♯‘𝑓))⟶𝑉 ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))(𝐸‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}) ∧ (𝑃‘0) = (𝑃‘(♯‘𝑓)))) → (∀𝑖 ∈ (0..^(♯‘𝑓))(𝐸‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∧ (𝑃‘0) = (𝑃‘(♯‘𝑓))))
11		clwlkclwwlklem2 29253	. . . . . 6 ⊢ (((𝐸:dom 𝐸–1-1→𝑅 ∧ 𝑓 ∈ Word dom 𝐸) ∧ (𝑃:(0...(♯‘𝑓))⟶𝑉 ∧ 2 ≤ (♯‘𝑃)) ∧ (∀𝑖 ∈ (0..^(♯‘𝑓))(𝐸‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∧ (𝑃‘0) = (𝑃‘(♯‘𝑓)))) → ((lastS‘𝑃) = (𝑃‘0) ∧ ∀𝑖 ∈ (0..^((♯‘𝑓) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑓) − 1)), (𝑃‘0)} ∈ ran 𝐸))
12	4, 7, 10, 11	syl3anc 1372	. . . . 5 ⊢ (((𝐸:dom 𝐸–1-1→𝑅 ∧ 𝑃 ∈ Word 𝑉 ∧ 2 ≤ (♯‘𝑃)) ∧ ((𝑓 ∈ Word dom 𝐸 ∧ 𝑃:(0...(♯‘𝑓))⟶𝑉 ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))(𝐸‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}) ∧ (𝑃‘0) = (𝑃‘(♯‘𝑓)))) → ((lastS‘𝑃) = (𝑃‘0) ∧ ∀𝑖 ∈ (0..^((♯‘𝑓) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑓) − 1)), (𝑃‘0)} ∈ ran 𝐸))
13		lencl 14483	. . . . . . . 8 ⊢ (𝑃 ∈ Word 𝑉 → (♯‘𝑃) ∈ ℕ₀)
14		lencl 14483	. . . . . . . . . . . 12 ⊢ (𝑓 ∈ Word dom 𝐸 → (♯‘𝑓) ∈ ℕ₀)
15		ffz0hash 14406	. . . . . . . . . . . . . . 15 ⊢ (((♯‘𝑓) ∈ ℕ₀ ∧ 𝑃:(0...(♯‘𝑓))⟶𝑉) → (♯‘𝑃) = ((♯‘𝑓) + 1))
16		oveq1 7416	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ ((♯‘𝑃) = ((♯‘𝑓) + 1) → ((♯‘𝑃) − 1) = (((♯‘𝑓) + 1) − 1))
17	16	oveq1d 7424	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ ((♯‘𝑃) = ((♯‘𝑓) + 1) → (((♯‘𝑃) − 1) − 0) = ((((♯‘𝑓) + 1) − 1) − 0))
18		nn0cn 12482	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ ((♯‘𝑓) ∈ ℕ₀ → (♯‘𝑓) ∈ ℂ)
19		peano2cn 11386	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ ((♯‘𝑓) ∈ ℂ → ((♯‘𝑓) + 1) ∈ ℂ)
20		peano2cnm 11526	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ (((♯‘𝑓) + 1) ∈ ℂ → (((♯‘𝑓) + 1) − 1) ∈ ℂ)
21	18, 19, 20	3syl 18	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ ((♯‘𝑓) ∈ ℕ₀ → (((♯‘𝑓) + 1) − 1) ∈ ℂ)
22	21	subid1d 11560	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((♯‘𝑓) ∈ ℕ₀ → ((((♯‘𝑓) + 1) − 1) − 0) = (((♯‘𝑓) + 1) − 1))
23		1cnd 11209	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ ((♯‘𝑓) ∈ ℕ₀ → 1 ∈ ℂ)
24	18, 23	pncand 11572	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((♯‘𝑓) ∈ ℕ₀ → (((♯‘𝑓) + 1) − 1) = (♯‘𝑓))
25	22, 24	eqtrd 2773	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ ((♯‘𝑓) ∈ ℕ₀ → ((((♯‘𝑓) + 1) − 1) − 0) = (♯‘𝑓))
26	25	adantr 482	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (((♯‘𝑓) ∈ ℕ₀ ∧ (♯‘𝑃) ∈ ℕ₀) → ((((♯‘𝑓) + 1) − 1) − 0) = (♯‘𝑓))
27	17, 26	sylan9eqr 2795	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((((♯‘𝑓) ∈ ℕ₀ ∧ (♯‘𝑃) ∈ ℕ₀) ∧ (♯‘𝑃) = ((♯‘𝑓) + 1)) → (((♯‘𝑃) − 1) − 0) = (♯‘𝑓))
28	27	oveq1d 7424	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((((♯‘𝑓) ∈ ℕ₀ ∧ (♯‘𝑃) ∈ ℕ₀) ∧ (♯‘𝑃) = ((♯‘𝑓) + 1)) → ((((♯‘𝑃) − 1) − 0) − 1) = ((♯‘𝑓) − 1))
29	28	oveq2d 7425	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((((♯‘𝑓) ∈ ℕ₀ ∧ (♯‘𝑃) ∈ ℕ₀) ∧ (♯‘𝑃) = ((♯‘𝑓) + 1)) → (0..^((((♯‘𝑃) − 1) − 0) − 1)) = (0..^((♯‘𝑓) − 1)))
30	29	raleqdv 3326	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((♯‘𝑓) ∈ ℕ₀ ∧ (♯‘𝑃) ∈ ℕ₀) ∧ (♯‘𝑃) = ((♯‘𝑓) + 1)) → (∀𝑖 ∈ (0..^((((♯‘𝑃) − 1) − 0) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ↔ ∀𝑖 ∈ (0..^((♯‘𝑓) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸))
31		oveq1 7416	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ ((♯‘𝑃) = ((♯‘𝑓) + 1) → ((♯‘𝑃) − 2) = (((♯‘𝑓) + 1) − 2))
32		2cnd 12290	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ ((♯‘𝑓) ∈ ℕ₀ → 2 ∈ ℂ)
33	18, 32, 23	subsub3d 11601	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((♯‘𝑓) ∈ ℕ₀ → ((♯‘𝑓) − (2 − 1)) = (((♯‘𝑓) + 1) − 2))
34		2m1e1 12338	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ (2 − 1) = 1
35	34	a1i 11	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ ((♯‘𝑓) ∈ ℕ₀ → (2 − 1) = 1)
36	35	oveq2d 7425	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((♯‘𝑓) ∈ ℕ₀ → ((♯‘𝑓) − (2 − 1)) = ((♯‘𝑓) − 1))
37	33, 36	eqtr3d 2775	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ ((♯‘𝑓) ∈ ℕ₀ → (((♯‘𝑓) + 1) − 2) = ((♯‘𝑓) − 1))
38	37	adantr 482	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (((♯‘𝑓) ∈ ℕ₀ ∧ (♯‘𝑃) ∈ ℕ₀) → (((♯‘𝑓) + 1) − 2) = ((♯‘𝑓) − 1))
39	31, 38	sylan9eqr 2795	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((((♯‘𝑓) ∈ ℕ₀ ∧ (♯‘𝑃) ∈ ℕ₀) ∧ (♯‘𝑃) = ((♯‘𝑓) + 1)) → ((♯‘𝑃) − 2) = ((♯‘𝑓) − 1))
40	39	fveq2d 6896	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((((♯‘𝑓) ∈ ℕ₀ ∧ (♯‘𝑃) ∈ ℕ₀) ∧ (♯‘𝑃) = ((♯‘𝑓) + 1)) → (𝑃‘((♯‘𝑃) − 2)) = (𝑃‘((♯‘𝑓) − 1)))
41	40	preq1d 4744	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((((♯‘𝑓) ∈ ℕ₀ ∧ (♯‘𝑃) ∈ ℕ₀) ∧ (♯‘𝑃) = ((♯‘𝑓) + 1)) → {(𝑃‘((♯‘𝑃) − 2)), (𝑃‘0)} = {(𝑃‘((♯‘𝑓) − 1)), (𝑃‘0)})
42	41	eleq1d 2819	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((♯‘𝑓) ∈ ℕ₀ ∧ (♯‘𝑃) ∈ ℕ₀) ∧ (♯‘𝑃) = ((♯‘𝑓) + 1)) → ({(𝑃‘((♯‘𝑃) − 2)), (𝑃‘0)} ∈ ran 𝐸 ↔ {(𝑃‘((♯‘𝑓) − 1)), (𝑃‘0)} ∈ ran 𝐸))
43	30, 42	anbi12d 632	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((♯‘𝑓) ∈ ℕ₀ ∧ (♯‘𝑃) ∈ ℕ₀) ∧ (♯‘𝑃) = ((♯‘𝑓) + 1)) → ((∀𝑖 ∈ (0..^((((♯‘𝑃) − 1) − 0) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑃) − 2)), (𝑃‘0)} ∈ ran 𝐸) ↔ (∀𝑖 ∈ (0..^((♯‘𝑓) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑓) − 1)), (𝑃‘0)} ∈ ran 𝐸)))
44	43	anbi2d 630	. . . . . . . . . . . . . . . . . 18 ⊢ ((((♯‘𝑓) ∈ ℕ₀ ∧ (♯‘𝑃) ∈ ℕ₀) ∧ (♯‘𝑃) = ((♯‘𝑓) + 1)) → (((lastS‘𝑃) = (𝑃‘0) ∧ (∀𝑖 ∈ (0..^((((♯‘𝑃) − 1) − 0) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑃) − 2)), (𝑃‘0)} ∈ ran 𝐸)) ↔ ((lastS‘𝑃) = (𝑃‘0) ∧ (∀𝑖 ∈ (0..^((♯‘𝑓) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑓) − 1)), (𝑃‘0)} ∈ ran 𝐸))))
45		3anass 1096	. . . . . . . . . . . . . . . . . 18 ⊢ (((lastS‘𝑃) = (𝑃‘0) ∧ ∀𝑖 ∈ (0..^((♯‘𝑓) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑓) − 1)), (𝑃‘0)} ∈ ran 𝐸) ↔ ((lastS‘𝑃) = (𝑃‘0) ∧ (∀𝑖 ∈ (0..^((♯‘𝑓) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑓) − 1)), (𝑃‘0)} ∈ ran 𝐸)))
46	44, 45	bitr4di 289	. . . . . . . . . . . . . . . . 17 ⊢ ((((♯‘𝑓) ∈ ℕ₀ ∧ (♯‘𝑃) ∈ ℕ₀) ∧ (♯‘𝑃) = ((♯‘𝑓) + 1)) → (((lastS‘𝑃) = (𝑃‘0) ∧ (∀𝑖 ∈ (0..^((((♯‘𝑃) − 1) − 0) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑃) − 2)), (𝑃‘0)} ∈ ran 𝐸)) ↔ ((lastS‘𝑃) = (𝑃‘0) ∧ ∀𝑖 ∈ (0..^((♯‘𝑓) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑓) − 1)), (𝑃‘0)} ∈ ran 𝐸)))
47	46	expcom 415	. . . . . . . . . . . . . . . 16 ⊢ ((♯‘𝑃) = ((♯‘𝑓) + 1) → (((♯‘𝑓) ∈ ℕ₀ ∧ (♯‘𝑃) ∈ ℕ₀) → (((lastS‘𝑃) = (𝑃‘0) ∧ (∀𝑖 ∈ (0..^((((♯‘𝑃) − 1) − 0) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑃) − 2)), (𝑃‘0)} ∈ ran 𝐸)) ↔ ((lastS‘𝑃) = (𝑃‘0) ∧ ∀𝑖 ∈ (0..^((♯‘𝑓) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑓) − 1)), (𝑃‘0)} ∈ ran 𝐸))))
48	47	expd 417	. . . . . . . . . . . . . . 15 ⊢ ((♯‘𝑃) = ((♯‘𝑓) + 1) → ((♯‘𝑓) ∈ ℕ₀ → ((♯‘𝑃) ∈ ℕ₀ → (((lastS‘𝑃) = (𝑃‘0) ∧ (∀𝑖 ∈ (0..^((((♯‘𝑃) − 1) − 0) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑃) − 2)), (𝑃‘0)} ∈ ran 𝐸)) ↔ ((lastS‘𝑃) = (𝑃‘0) ∧ ∀𝑖 ∈ (0..^((♯‘𝑓) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑓) − 1)), (𝑃‘0)} ∈ ran 𝐸)))))
49	15, 48	syl 17	. . . . . . . . . . . . . 14 ⊢ (((♯‘𝑓) ∈ ℕ₀ ∧ 𝑃:(0...(♯‘𝑓))⟶𝑉) → ((♯‘𝑓) ∈ ℕ₀ → ((♯‘𝑃) ∈ ℕ₀ → (((lastS‘𝑃) = (𝑃‘0) ∧ (∀𝑖 ∈ (0..^((((♯‘𝑃) − 1) − 0) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑃) − 2)), (𝑃‘0)} ∈ ran 𝐸)) ↔ ((lastS‘𝑃) = (𝑃‘0) ∧ ∀𝑖 ∈ (0..^((♯‘𝑓) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑓) − 1)), (𝑃‘0)} ∈ ran 𝐸)))))
50	49	ex 414	. . . . . . . . . . . . 13 ⊢ ((♯‘𝑓) ∈ ℕ₀ → (𝑃:(0...(♯‘𝑓))⟶𝑉 → ((♯‘𝑓) ∈ ℕ₀ → ((♯‘𝑃) ∈ ℕ₀ → (((lastS‘𝑃) = (𝑃‘0) ∧ (∀𝑖 ∈ (0..^((((♯‘𝑃) − 1) − 0) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑃) − 2)), (𝑃‘0)} ∈ ran 𝐸)) ↔ ((lastS‘𝑃) = (𝑃‘0) ∧ ∀𝑖 ∈ (0..^((♯‘𝑓) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑓) − 1)), (𝑃‘0)} ∈ ran 𝐸))))))
51	50	com23 86	. . . . . . . . . . . 12 ⊢ ((♯‘𝑓) ∈ ℕ₀ → ((♯‘𝑓) ∈ ℕ₀ → (𝑃:(0...(♯‘𝑓))⟶𝑉 → ((♯‘𝑃) ∈ ℕ₀ → (((lastS‘𝑃) = (𝑃‘0) ∧ (∀𝑖 ∈ (0..^((((♯‘𝑃) − 1) − 0) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑃) − 2)), (𝑃‘0)} ∈ ran 𝐸)) ↔ ((lastS‘𝑃) = (𝑃‘0) ∧ ∀𝑖 ∈ (0..^((♯‘𝑓) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑓) − 1)), (𝑃‘0)} ∈ ran 𝐸))))))
52	14, 14, 51	sylc 65	. . . . . . . . . . 11 ⊢ (𝑓 ∈ Word dom 𝐸 → (𝑃:(0...(♯‘𝑓))⟶𝑉 → ((♯‘𝑃) ∈ ℕ₀ → (((lastS‘𝑃) = (𝑃‘0) ∧ (∀𝑖 ∈ (0..^((((♯‘𝑃) − 1) − 0) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑃) − 2)), (𝑃‘0)} ∈ ran 𝐸)) ↔ ((lastS‘𝑃) = (𝑃‘0) ∧ ∀𝑖 ∈ (0..^((♯‘𝑓) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑓) − 1)), (𝑃‘0)} ∈ ran 𝐸)))))
53	52	imp 408	. . . . . . . . . 10 ⊢ ((𝑓 ∈ Word dom 𝐸 ∧ 𝑃:(0...(♯‘𝑓))⟶𝑉) → ((♯‘𝑃) ∈ ℕ₀ → (((lastS‘𝑃) = (𝑃‘0) ∧ (∀𝑖 ∈ (0..^((((♯‘𝑃) − 1) − 0) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑃) − 2)), (𝑃‘0)} ∈ ran 𝐸)) ↔ ((lastS‘𝑃) = (𝑃‘0) ∧ ∀𝑖 ∈ (0..^((♯‘𝑓) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑓) − 1)), (𝑃‘0)} ∈ ran 𝐸))))
54	53	3adant3 1133	. . . . . . . . 9 ⊢ ((𝑓 ∈ Word dom 𝐸 ∧ 𝑃:(0...(♯‘𝑓))⟶𝑉 ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))(𝐸‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}) → ((♯‘𝑃) ∈ ℕ₀ → (((lastS‘𝑃) = (𝑃‘0) ∧ (∀𝑖 ∈ (0..^((((♯‘𝑃) − 1) − 0) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑃) − 2)), (𝑃‘0)} ∈ ran 𝐸)) ↔ ((lastS‘𝑃) = (𝑃‘0) ∧ ∀𝑖 ∈ (0..^((♯‘𝑓) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑓) − 1)), (𝑃‘0)} ∈ ran 𝐸))))
55	54	adantr 482	. . . . . . . 8 ⊢ (((𝑓 ∈ Word dom 𝐸 ∧ 𝑃:(0...(♯‘𝑓))⟶𝑉 ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))(𝐸‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}) ∧ (𝑃‘0) = (𝑃‘(♯‘𝑓))) → ((♯‘𝑃) ∈ ℕ₀ → (((lastS‘𝑃) = (𝑃‘0) ∧ (∀𝑖 ∈ (0..^((((♯‘𝑃) − 1) − 0) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑃) − 2)), (𝑃‘0)} ∈ ran 𝐸)) ↔ ((lastS‘𝑃) = (𝑃‘0) ∧ ∀𝑖 ∈ (0..^((♯‘𝑓) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑓) − 1)), (𝑃‘0)} ∈ ran 𝐸))))
56	13, 55	syl5com 31	. . . . . . 7 ⊢ (𝑃 ∈ Word 𝑉 → (((𝑓 ∈ Word dom 𝐸 ∧ 𝑃:(0...(♯‘𝑓))⟶𝑉 ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))(𝐸‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}) ∧ (𝑃‘0) = (𝑃‘(♯‘𝑓))) → (((lastS‘𝑃) = (𝑃‘0) ∧ (∀𝑖 ∈ (0..^((((♯‘𝑃) − 1) − 0) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑃) − 2)), (𝑃‘0)} ∈ ran 𝐸)) ↔ ((lastS‘𝑃) = (𝑃‘0) ∧ ∀𝑖 ∈ (0..^((♯‘𝑓) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑓) − 1)), (𝑃‘0)} ∈ ran 𝐸))))
57	56	3ad2ant2 1135	. . . . . 6 ⊢ ((𝐸:dom 𝐸–1-1→𝑅 ∧ 𝑃 ∈ Word 𝑉 ∧ 2 ≤ (♯‘𝑃)) → (((𝑓 ∈ Word dom 𝐸 ∧ 𝑃:(0...(♯‘𝑓))⟶𝑉 ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))(𝐸‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}) ∧ (𝑃‘0) = (𝑃‘(♯‘𝑓))) → (((lastS‘𝑃) = (𝑃‘0) ∧ (∀𝑖 ∈ (0..^((((♯‘𝑃) − 1) − 0) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑃) − 2)), (𝑃‘0)} ∈ ran 𝐸)) ↔ ((lastS‘𝑃) = (𝑃‘0) ∧ ∀𝑖 ∈ (0..^((♯‘𝑓) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑓) − 1)), (𝑃‘0)} ∈ ran 𝐸))))
58	57	imp 408	. . . . 5 ⊢ (((𝐸:dom 𝐸–1-1→𝑅 ∧ 𝑃 ∈ Word 𝑉 ∧ 2 ≤ (♯‘𝑃)) ∧ ((𝑓 ∈ Word dom 𝐸 ∧ 𝑃:(0...(♯‘𝑓))⟶𝑉 ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))(𝐸‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}) ∧ (𝑃‘0) = (𝑃‘(♯‘𝑓)))) → (((lastS‘𝑃) = (𝑃‘0) ∧ (∀𝑖 ∈ (0..^((((♯‘𝑃) − 1) − 0) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑃) − 2)), (𝑃‘0)} ∈ ran 𝐸)) ↔ ((lastS‘𝑃) = (𝑃‘0) ∧ ∀𝑖 ∈ (0..^((♯‘𝑓) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑓) − 1)), (𝑃‘0)} ∈ ran 𝐸)))
59	12, 58	mpbird 257	. . . 4 ⊢ (((𝐸:dom 𝐸–1-1→𝑅 ∧ 𝑃 ∈ Word 𝑉 ∧ 2 ≤ (♯‘𝑃)) ∧ ((𝑓 ∈ Word dom 𝐸 ∧ 𝑃:(0...(♯‘𝑓))⟶𝑉 ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))(𝐸‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}) ∧ (𝑃‘0) = (𝑃‘(♯‘𝑓)))) → ((lastS‘𝑃) = (𝑃‘0) ∧ (∀𝑖 ∈ (0..^((((♯‘𝑃) − 1) − 0) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑃) − 2)), (𝑃‘0)} ∈ ran 𝐸)))
60	59	ex 414	. . 3 ⊢ ((𝐸:dom 𝐸–1-1→𝑅 ∧ 𝑃 ∈ Word 𝑉 ∧ 2 ≤ (♯‘𝑃)) → (((𝑓 ∈ Word dom 𝐸 ∧ 𝑃:(0...(♯‘𝑓))⟶𝑉 ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))(𝐸‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}) ∧ (𝑃‘0) = (𝑃‘(♯‘𝑓))) → ((lastS‘𝑃) = (𝑃‘0) ∧ (∀𝑖 ∈ (0..^((((♯‘𝑃) − 1) − 0) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑃) − 2)), (𝑃‘0)} ∈ ran 𝐸))))
61	60	exlimdv 1937	. 2 ⊢ ((𝐸:dom 𝐸–1-1→𝑅 ∧ 𝑃 ∈ Word 𝑉 ∧ 2 ≤ (♯‘𝑃)) → (∃𝑓((𝑓 ∈ Word dom 𝐸 ∧ 𝑃:(0...(♯‘𝑓))⟶𝑉 ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))(𝐸‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}) ∧ (𝑃‘0) = (𝑃‘(♯‘𝑓))) → ((lastS‘𝑃) = (𝑃‘0) ∧ (∀𝑖 ∈ (0..^((((♯‘𝑃) − 1) − 0) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑃) − 2)), (𝑃‘0)} ∈ ran 𝐸))))
62		clwlkclwwlklem1 29252	. 2 ⊢ ((𝐸:dom 𝐸–1-1→𝑅 ∧ 𝑃 ∈ Word 𝑉 ∧ 2 ≤ (♯‘𝑃)) → (((lastS‘𝑃) = (𝑃‘0) ∧ (∀𝑖 ∈ (0..^((((♯‘𝑃) − 1) − 0) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑃) − 2)), (𝑃‘0)} ∈ ran 𝐸)) → ∃𝑓((𝑓 ∈ Word dom 𝐸 ∧ 𝑃:(0...(♯‘𝑓))⟶𝑉 ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))(𝐸‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}) ∧ (𝑃‘0) = (𝑃‘(♯‘𝑓)))))
63	61, 62	impbid 211	1 ⊢ ((𝐸:dom 𝐸–1-1→𝑅 ∧ 𝑃 ∈ Word 𝑉 ∧ 2 ≤ (♯‘𝑃)) → (∃𝑓((𝑓 ∈ Word dom 𝐸 ∧ 𝑃:(0...(♯‘𝑓))⟶𝑉 ∧ ∀𝑖 ∈ (0..^(♯‘𝑓))(𝐸‘(𝑓‘𝑖)) = {(𝑃‘𝑖), (𝑃‘(𝑖 + 1))}) ∧ (𝑃‘0) = (𝑃‘(♯‘𝑓))) ↔ ((lastS‘𝑃) = (𝑃‘0) ∧ (∀𝑖 ∈ (0..^((((♯‘𝑃) − 1) − 0) − 1)){(𝑃‘𝑖), (𝑃‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {(𝑃‘((♯‘𝑃) − 2)), (𝑃‘0)} ∈ ran 𝐸))))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 397 ∧ w3a 1088 = wceq 1542 ∃wex 1782 ∈ wcel 2107 ∀wral 3062 {cpr 4631 class class class wbr 5149 dom cdm 5677 ran crn 5678 ⟶wf 6540 –1-1→wf1 6541 ‘cfv 6544 (class class class)co 7409 ℂcc 11108 0cc0 11110 1c1 11111 + caddc 11113 ≤ cle 11249 − cmin 11444 2c2 12267 ℕ₀cn0 12472 ...cfz 13484 ..^cfzo 13627 ♯chash 14290 Word cword 14464 lastSclsw 14512

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-rep 5286 ax-sep 5300 ax-nul 5307 ax-pow 5364 ax-pr 5428 ax-un 7725 ax-cnex 11166 ax-resscn 11167 ax-1cn 11168 ax-icn 11169 ax-addcl 11170 ax-addrcl 11171 ax-mulcl 11172 ax-mulrcl 11173 ax-mulcom 11174 ax-addass 11175 ax-mulass 11176 ax-distr 11177 ax-i2m1 11178 ax-1ne0 11179 ax-1rid 11180 ax-rnegex 11181 ax-rrecex 11182 ax-cnre 11183 ax-pre-lttri 11184 ax-pre-lttrn 11185 ax-pre-ltadd 11186 ax-pre-mulgt0 11187

This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-reu 3378 df-rab 3434 df-v 3477 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-op 4636 df-uni 4910 df-int 4952 df-iun 5000 df-br 5150 df-opab 5212 df-mpt 5233 df-tr 5267 df-id 5575 df-eprel 5581 df-po 5589 df-so 5590 df-fr 5632 df-we 5634 df-xp 5683 df-rel 5684 df-cnv 5685 df-co 5686 df-dm 5687 df-rn 5688 df-res 5689 df-ima 5690 df-pred 6301 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6496 df-fun 6546 df-fn 6547 df-f 6548 df-f1 6549 df-fo 6550 df-f1o 6551 df-fv 6552 df-riota 7365 df-ov 7412 df-oprab 7413 df-mpo 7414 df-om 7856 df-1st 7975 df-2nd 7976 df-frecs 8266 df-wrecs 8297 df-recs 8371 df-rdg 8410 df-1o 8466 df-er 8703 df-en 8940 df-dom 8941 df-sdom 8942 df-fin 8943 df-card 9934 df-pnf 11250 df-mnf 11251 df-xr 11252 df-ltxr 11253 df-le 11254 df-sub 11446 df-neg 11447 df-nn 12213 df-2 12275 df-n0 12473 df-z 12559 df-uz 12823 df-fz 13485 df-fzo 13628 df-hash 14291 df-word 14465 df-lsw 14513

This theorem is referenced by: clwlkclwwlk 29255

W3C validator