av-numclwlk1lem2f1 - Mathbox for Alexander van der Vekens

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Theorem av-numclwlk1lem2f1 41524

Description: 𝑇 is a 1-1 function. (Contributed by AV, 26-Sep-2018.) (Revised by AV, 29-May-2021.)

**Hypotheses**
Ref	Expression
av-extwwlkfab.v	⊢ 𝑉 = (Vtx‘𝐺)
av-extwwlkfab.f	⊢ 𝐹 = (𝑣 ∈ 𝑉, 𝑛 ∈ ℕ ↦ {𝑤 ∈ (𝑛 ClWWalkSN 𝐺) ∣ (𝑤‘0) = 𝑣})
av-extwwlkfab.c	⊢ 𝐶 = (𝑣 ∈ 𝑉, 𝑛 ∈ (ℤ_≥‘2) ↦ {𝑤 ∈ (𝑛 ClWWalkSN 𝐺) ∣ ((𝑤‘0) = 𝑣 ∧ (𝑤‘(𝑛 − 2)) = (𝑤‘0))})
av-numclwwlk.t	⊢ 𝑇 = (𝑤 ∈ (𝑋𝐶𝑁) ↦ ⟨(𝑤 substr ⟨0, (𝑁 − 2)⟩), (𝑤‘(𝑁 − 1))⟩)

**Assertion**
Ref	Expression
av-numclwlk1lem2f1	⊢ ((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) → 𝑇:(𝑋𝐶𝑁)–1-1→((𝑋𝐹(𝑁 − 2)) × (𝐺 NeighbVtx 𝑋)))

Distinct variable groups: 𝑛,𝐺,𝑣,𝑤 𝑛,𝑁,𝑣,𝑤 𝑛,𝑉,𝑣,𝑤 𝑛,𝑋,𝑣,𝑤 𝑤,𝐹 𝑤,𝐶 Allowed substitution hints: 𝐶(𝑣,𝑛) 𝑇(𝑤,𝑣,𝑛) 𝐹(𝑣,𝑛)

Proof of Theorem av-numclwlk1lem2f1 Dummy variables 𝑢 𝑝 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		av-extwwlkfab.v	. . 3 ⊢ 𝑉 = (Vtx‘𝐺)
2		av-extwwlkfab.f	. . 3 ⊢ 𝐹 = (𝑣 ∈ 𝑉, 𝑛 ∈ ℕ ↦ {𝑤 ∈ (𝑛 ClWWalkSN 𝐺) ∣ (𝑤‘0) = 𝑣})
3		av-extwwlkfab.c	. . 3 ⊢ 𝐶 = (𝑣 ∈ 𝑉, 𝑛 ∈ (ℤ_≥‘2) ↦ {𝑤 ∈ (𝑛 ClWWalkSN 𝐺) ∣ ((𝑤‘0) = 𝑣 ∧ (𝑤‘(𝑛 − 2)) = (𝑤‘0))})
4		av-numclwwlk.t	. . 3 ⊢ 𝑇 = (𝑤 ∈ (𝑋𝐶𝑁) ↦ ⟨(𝑤 substr ⟨0, (𝑁 − 2)⟩), (𝑤‘(𝑁 − 1))⟩)
5	1, 2, 3, 4	av-numclwlk1lem2f 41522	. 2 ⊢ ((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) → 𝑇:(𝑋𝐶𝑁)⟶((𝑋𝐹(𝑁 − 2)) × (𝐺 NeighbVtx 𝑋)))
6	1, 2, 3, 4	av-numclwlk1lem2fv 41523	. . . . . 6 ⊢ (𝑝 ∈ (𝑋𝐶𝑁) → (𝑇‘𝑝) = ⟨(𝑝 substr ⟨0, (𝑁 − 2)⟩), (𝑝‘(𝑁 − 1))⟩)
7	6	ad2antrl 760	. . . . 5 ⊢ (((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) ∧ (𝑝 ∈ (𝑋𝐶𝑁) ∧ 𝑢 ∈ (𝑋𝐶𝑁))) → (𝑇‘𝑝) = ⟨(𝑝 substr ⟨0, (𝑁 − 2)⟩), (𝑝‘(𝑁 − 1))⟩)
8	1, 2, 3, 4	av-numclwlk1lem2fv 41523	. . . . . 6 ⊢ (𝑢 ∈ (𝑋𝐶𝑁) → (𝑇‘𝑢) = ⟨(𝑢 substr ⟨0, (𝑁 − 2)⟩), (𝑢‘(𝑁 − 1))⟩)
9	8	ad2antll 761	. . . . 5 ⊢ (((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) ∧ (𝑝 ∈ (𝑋𝐶𝑁) ∧ 𝑢 ∈ (𝑋𝐶𝑁))) → (𝑇‘𝑢) = ⟨(𝑢 substr ⟨0, (𝑁 − 2)⟩), (𝑢‘(𝑁 − 1))⟩)
10	7, 9	eqeq12d 2625	. . . 4 ⊢ (((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) ∧ (𝑝 ∈ (𝑋𝐶𝑁) ∧ 𝑢 ∈ (𝑋𝐶𝑁))) → ((𝑇‘𝑝) = (𝑇‘𝑢) ↔ ⟨(𝑝 substr ⟨0, (𝑁 − 2)⟩), (𝑝‘(𝑁 − 1))⟩ = ⟨(𝑢 substr ⟨0, (𝑁 − 2)⟩), (𝑢‘(𝑁 − 1))⟩))
11		ovex 6577	. . . . . 6 ⊢ (𝑝 substr ⟨0, (𝑁 − 2)⟩) ∈ V
12		fvex 6113	. . . . . 6 ⊢ (𝑝‘(𝑁 − 1)) ∈ V
13	11, 12	opth 4871	. . . . 5 ⊢ (⟨(𝑝 substr ⟨0, (𝑁 − 2)⟩), (𝑝‘(𝑁 − 1))⟩ = ⟨(𝑢 substr ⟨0, (𝑁 − 2)⟩), (𝑢‘(𝑁 − 1))⟩ ↔ ((𝑝 substr ⟨0, (𝑁 − 2)⟩) = (𝑢 substr ⟨0, (𝑁 − 2)⟩) ∧ (𝑝‘(𝑁 − 1)) = (𝑢‘(𝑁 − 1))))
14		uzuzle23 11605	. . . . . . . . . 10 ⊢ (𝑁 ∈ (ℤ_≥‘3) → 𝑁 ∈ (ℤ_≥‘2))
15	3	av-numclwwlkovgel 41519	. . . . . . . . . 10 ⊢ ((𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘2)) → (𝑝 ∈ (𝑋𝐶𝑁) ↔ (𝑝 ∈ (𝑁 ClWWalkSN 𝐺) ∧ (𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0))))
16	14, 15	sylan2 490	. . . . . . . . 9 ⊢ ((𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) → (𝑝 ∈ (𝑋𝐶𝑁) ↔ (𝑝 ∈ (𝑁 ClWWalkSN 𝐺) ∧ (𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0))))
17	1	clwwlknbp 41193	. . . . . . . . . . 11 ⊢ (𝑝 ∈ (𝑁 ClWWalkSN 𝐺) → (𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁))
18	17	3ad2ant1 1075	. . . . . . . . . 10 ⊢ ((𝑝 ∈ (𝑁 ClWWalkSN 𝐺) ∧ (𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0)) → (𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁))
19		3simpc 1053	. . . . . . . . . 10 ⊢ ((𝑝 ∈ (𝑁 ClWWalkSN 𝐺) ∧ (𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0)) → ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0)))
20	18, 19	jca 553	. . . . . . . . 9 ⊢ ((𝑝 ∈ (𝑁 ClWWalkSN 𝐺) ∧ (𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0)) → ((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) ∧ ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0))))
21	16, 20	syl6bi 242	. . . . . . . 8 ⊢ ((𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) → (𝑝 ∈ (𝑋𝐶𝑁) → ((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) ∧ ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0)))))
22	21	3adant1 1072	. . . . . . 7 ⊢ ((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) → (𝑝 ∈ (𝑋𝐶𝑁) → ((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) ∧ ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0)))))
23	3	av-numclwwlkovgel 41519	. . . . . . . . . 10 ⊢ ((𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘2)) → (𝑢 ∈ (𝑋𝐶𝑁) ↔ (𝑢 ∈ (𝑁 ClWWalkSN 𝐺) ∧ (𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0))))
24	14, 23	sylan2 490	. . . . . . . . 9 ⊢ ((𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) → (𝑢 ∈ (𝑋𝐶𝑁) ↔ (𝑢 ∈ (𝑁 ClWWalkSN 𝐺) ∧ (𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0))))
25	1	clwwlknbp 41193	. . . . . . . . . . 11 ⊢ (𝑢 ∈ (𝑁 ClWWalkSN 𝐺) → (𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁))
26	25	3ad2ant1 1075	. . . . . . . . . 10 ⊢ ((𝑢 ∈ (𝑁 ClWWalkSN 𝐺) ∧ (𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0)) → (𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁))
27		3simpc 1053	. . . . . . . . . 10 ⊢ ((𝑢 ∈ (𝑁 ClWWalkSN 𝐺) ∧ (𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0)) → ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0)))
28	26, 27	jca 553	. . . . . . . . 9 ⊢ ((𝑢 ∈ (𝑁 ClWWalkSN 𝐺) ∧ (𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0)) → ((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0))))
29	24, 28	syl6bi 242	. . . . . . . 8 ⊢ ((𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) → (𝑢 ∈ (𝑋𝐶𝑁) → ((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0)))))
30	29	3adant1 1072	. . . . . . 7 ⊢ ((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) → (𝑢 ∈ (𝑋𝐶𝑁) → ((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0)))))
31		simpll 786	. . . . . . . . . . 11 ⊢ (((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) ∧ ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0))) → 𝑝 ∈ Word 𝑉)
32	31	ad2antrl 760	. . . . . . . . . 10 ⊢ (((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) ∧ (((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) ∧ ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0))) ∧ ((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0))))) → 𝑝 ∈ Word 𝑉)
33		simprll 798	. . . . . . . . . . 11 ⊢ ((((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) ∧ ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0))) ∧ ((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0)))) → 𝑢 ∈ Word 𝑉)
34	33	adantl 481	. . . . . . . . . 10 ⊢ (((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) ∧ (((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) ∧ ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0))) ∧ ((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0))))) → 𝑢 ∈ Word 𝑉)
35		eleq1 2676	. . . . . . . . . . . . . . . . 17 ⊢ (𝑁 = (#‘𝑝) → (𝑁 ∈ (ℤ_≥‘3) ↔ (#‘𝑝) ∈ (ℤ_≥‘3)))
36	35	eqcoms 2618	. . . . . . . . . . . . . . . 16 ⊢ ((#‘𝑝) = 𝑁 → (𝑁 ∈ (ℤ_≥‘3) ↔ (#‘𝑝) ∈ (ℤ_≥‘3)))
37		eluz2 11569	. . . . . . . . . . . . . . . . 17 ⊢ ((#‘𝑝) ∈ (ℤ_≥‘3) ↔ (3 ∈ ℤ ∧ (#‘𝑝) ∈ ℤ ∧ 3 ≤ (#‘𝑝)))
38		1red 9934	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((#‘𝑝) ∈ ℤ → 1 ∈ ℝ)
39		3re 10971	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ 3 ∈ ℝ
40	39	a1i 11	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((#‘𝑝) ∈ ℤ → 3 ∈ ℝ)
41		zre 11258	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((#‘𝑝) ∈ ℤ → (#‘𝑝) ∈ ℝ)
42	38, 40, 41	3jca 1235	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((#‘𝑝) ∈ ℤ → (1 ∈ ℝ ∧ 3 ∈ ℝ ∧ (#‘𝑝) ∈ ℝ))
43		1lt3 11073	. . . . . . . . . . . . . . . . . . . 20 ⊢ 1 < 3
44		ltletr 10008	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((1 ∈ ℝ ∧ 3 ∈ ℝ ∧ (#‘𝑝) ∈ ℝ) → ((1 < 3 ∧ 3 ≤ (#‘𝑝)) → 1 < (#‘𝑝)))
45	44	expd 451	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((1 ∈ ℝ ∧ 3 ∈ ℝ ∧ (#‘𝑝) ∈ ℝ) → (1 < 3 → (3 ≤ (#‘𝑝) → 1 < (#‘𝑝))))
46	42, 43, 45	mpisyl 21	. . . . . . . . . . . . . . . . . . 19 ⊢ ((#‘𝑝) ∈ ℤ → (3 ≤ (#‘𝑝) → 1 < (#‘𝑝)))
47	46	imp 444	. . . . . . . . . . . . . . . . . 18 ⊢ (((#‘𝑝) ∈ ℤ ∧ 3 ≤ (#‘𝑝)) → 1 < (#‘𝑝))
48	47	3adant1 1072	. . . . . . . . . . . . . . . . 17 ⊢ ((3 ∈ ℤ ∧ (#‘𝑝) ∈ ℤ ∧ 3 ≤ (#‘𝑝)) → 1 < (#‘𝑝))
49	37, 48	sylbi 206	. . . . . . . . . . . . . . . 16 ⊢ ((#‘𝑝) ∈ (ℤ_≥‘3) → 1 < (#‘𝑝))
50	36, 49	syl6bi 242	. . . . . . . . . . . . . . 15 ⊢ ((#‘𝑝) = 𝑁 → (𝑁 ∈ (ℤ_≥‘3) → 1 < (#‘𝑝)))
51	50	com12 32	. . . . . . . . . . . . . 14 ⊢ (𝑁 ∈ (ℤ_≥‘3) → ((#‘𝑝) = 𝑁 → 1 < (#‘𝑝)))
52	51	3ad2ant3 1077	. . . . . . . . . . . . 13 ⊢ ((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) → ((#‘𝑝) = 𝑁 → 1 < (#‘𝑝)))
53	52	com12 32	. . . . . . . . . . . 12 ⊢ ((#‘𝑝) = 𝑁 → ((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) → 1 < (#‘𝑝)))
54	53	ad3antlr 763	. . . . . . . . . . 11 ⊢ ((((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) ∧ ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0))) ∧ ((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0)))) → ((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) → 1 < (#‘𝑝)))
55	54	impcom 445	. . . . . . . . . 10 ⊢ (((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) ∧ (((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) ∧ ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0))) ∧ ((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0))))) → 1 < (#‘𝑝))
56		2swrd2eqwrdeq 13544	. . . . . . . . . 10 ⊢ ((𝑝 ∈ Word 𝑉 ∧ 𝑢 ∈ Word 𝑉 ∧ 1 < (#‘𝑝)) → (𝑝 = 𝑢 ↔ ((#‘𝑝) = (#‘𝑢) ∧ ((𝑝 substr ⟨0, ((#‘𝑝) − 2)⟩) = (𝑢 substr ⟨0, ((#‘𝑝) − 2)⟩) ∧ (𝑝‘((#‘𝑝) − 2)) = (𝑢‘((#‘𝑝) − 2)) ∧ ( lastS ‘𝑝) = ( lastS ‘𝑢)))))
57	32, 34, 55, 56	syl3anc 1318	. . . . . . . . 9 ⊢ (((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) ∧ (((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) ∧ ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0))) ∧ ((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0))))) → (𝑝 = 𝑢 ↔ ((#‘𝑝) = (#‘𝑢) ∧ ((𝑝 substr ⟨0, ((#‘𝑝) − 2)⟩) = (𝑢 substr ⟨0, ((#‘𝑝) − 2)⟩) ∧ (𝑝‘((#‘𝑝) − 2)) = (𝑢‘((#‘𝑝) − 2)) ∧ ( lastS ‘𝑝) = ( lastS ‘𝑢)))))
58		eqtr3 2631	. . . . . . . . . . . . . . . 16 ⊢ (((#‘𝑝) = 𝑁 ∧ (#‘𝑢) = 𝑁) → (#‘𝑝) = (#‘𝑢))
59	58	expcom 450	. . . . . . . . . . . . . . 15 ⊢ ((#‘𝑢) = 𝑁 → ((#‘𝑝) = 𝑁 → (#‘𝑝) = (#‘𝑢)))
60	59	ad2antlr 759	. . . . . . . . . . . . . 14 ⊢ (((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0))) → ((#‘𝑝) = 𝑁 → (#‘𝑝) = (#‘𝑢)))
61	60	com12 32	. . . . . . . . . . . . 13 ⊢ ((#‘𝑝) = 𝑁 → (((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0))) → (#‘𝑝) = (#‘𝑢)))
62	61	ad2antlr 759	. . . . . . . . . . . 12 ⊢ (((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) ∧ ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0))) → (((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0))) → (#‘𝑝) = (#‘𝑢)))
63	62	imp 444	. . . . . . . . . . 11 ⊢ ((((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) ∧ ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0))) ∧ ((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0)))) → (#‘𝑝) = (#‘𝑢))
64	63	adantl 481	. . . . . . . . . 10 ⊢ (((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) ∧ (((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) ∧ ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0))) ∧ ((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0))))) → (#‘𝑝) = (#‘𝑢))
65	64	biantrurd 528	. . . . . . . . 9 ⊢ (((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) ∧ (((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) ∧ ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0))) ∧ ((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0))))) → (((𝑝 substr ⟨0, ((#‘𝑝) − 2)⟩) = (𝑢 substr ⟨0, ((#‘𝑝) − 2)⟩) ∧ (𝑝‘((#‘𝑝) − 2)) = (𝑢‘((#‘𝑝) − 2)) ∧ ( lastS ‘𝑝) = ( lastS ‘𝑢)) ↔ ((#‘𝑝) = (#‘𝑢) ∧ ((𝑝 substr ⟨0, ((#‘𝑝) − 2)⟩) = (𝑢 substr ⟨0, ((#‘𝑝) − 2)⟩) ∧ (𝑝‘((#‘𝑝) − 2)) = (𝑢‘((#‘𝑝) − 2)) ∧ ( lastS ‘𝑝) = ( lastS ‘𝑢)))))
66		3anan12 1044	. . . . . . . . . . 11 ⊢ (((𝑝 substr ⟨0, ((#‘𝑝) − 2)⟩) = (𝑢 substr ⟨0, ((#‘𝑝) − 2)⟩) ∧ (𝑝‘((#‘𝑝) − 2)) = (𝑢‘((#‘𝑝) − 2)) ∧ ( lastS ‘𝑝) = ( lastS ‘𝑢)) ↔ ((𝑝‘((#‘𝑝) − 2)) = (𝑢‘((#‘𝑝) − 2)) ∧ ((𝑝 substr ⟨0, ((#‘𝑝) − 2)⟩) = (𝑢 substr ⟨0, ((#‘𝑝) − 2)⟩) ∧ ( lastS ‘𝑝) = ( lastS ‘𝑢))))
67	66	a1i 11	. . . . . . . . . 10 ⊢ (((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) ∧ (((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) ∧ ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0))) ∧ ((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0))))) → (((𝑝 substr ⟨0, ((#‘𝑝) − 2)⟩) = (𝑢 substr ⟨0, ((#‘𝑝) − 2)⟩) ∧ (𝑝‘((#‘𝑝) − 2)) = (𝑢‘((#‘𝑝) − 2)) ∧ ( lastS ‘𝑝) = ( lastS ‘𝑢)) ↔ ((𝑝‘((#‘𝑝) − 2)) = (𝑢‘((#‘𝑝) − 2)) ∧ ((𝑝 substr ⟨0, ((#‘𝑝) − 2)⟩) = (𝑢 substr ⟨0, ((#‘𝑝) − 2)⟩) ∧ ( lastS ‘𝑝) = ( lastS ‘𝑢)))))
68		eqeq2 2621	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝑝‘0) = 𝑋 → ((𝑝‘(𝑁 − 2)) = (𝑝‘0) ↔ (𝑝‘(𝑁 − 2)) = 𝑋))
69		oveq1 6556	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝑁 = (#‘𝑝) → (𝑁 − 2) = ((#‘𝑝) − 2))
70	69	eqcoms 2618	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((#‘𝑝) = 𝑁 → (𝑁 − 2) = ((#‘𝑝) − 2))
71	70	fveq2d 6107	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((#‘𝑝) = 𝑁 → (𝑝‘(𝑁 − 2)) = (𝑝‘((#‘𝑝) − 2)))
72	71	eqeq1d 2612	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((#‘𝑝) = 𝑁 → ((𝑝‘(𝑁 − 2)) = 𝑋 ↔ (𝑝‘((#‘𝑝) − 2)) = 𝑋))
73	72	biimpcd 238	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝑝‘(𝑁 − 2)) = 𝑋 → ((#‘𝑝) = 𝑁 → (𝑝‘((#‘𝑝) − 2)) = 𝑋))
74	68, 73	syl6bi 242	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑝‘0) = 𝑋 → ((𝑝‘(𝑁 − 2)) = (𝑝‘0) → ((#‘𝑝) = 𝑁 → (𝑝‘((#‘𝑝) − 2)) = 𝑋)))
75	74	imp 444	. . . . . . . . . . . . . . . . 17 ⊢ (((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0)) → ((#‘𝑝) = 𝑁 → (𝑝‘((#‘𝑝) − 2)) = 𝑋))
76	75	com12 32	. . . . . . . . . . . . . . . 16 ⊢ ((#‘𝑝) = 𝑁 → (((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0)) → (𝑝‘((#‘𝑝) − 2)) = 𝑋))
77	76	adantl 481	. . . . . . . . . . . . . . 15 ⊢ ((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) → (((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0)) → (𝑝‘((#‘𝑝) − 2)) = 𝑋))
78	77	imp 444	. . . . . . . . . . . . . 14 ⊢ (((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) ∧ ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0))) → (𝑝‘((#‘𝑝) − 2)) = 𝑋)
79	78	adantr 480	. . . . . . . . . . . . 13 ⊢ ((((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) ∧ ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0))) ∧ ((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0)))) → (𝑝‘((#‘𝑝) − 2)) = 𝑋)
80		oveq1 6556	. . . . . . . . . . . . . . . 16 ⊢ ((#‘𝑝) = 𝑁 → ((#‘𝑝) − 2) = (𝑁 − 2))
81	80	fveq2d 6107	. . . . . . . . . . . . . . 15 ⊢ ((#‘𝑝) = 𝑁 → (𝑢‘((#‘𝑝) − 2)) = (𝑢‘(𝑁 − 2)))
82		eqeq1 2614	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑢‘0) = (𝑢‘(𝑁 − 2)) → ((𝑢‘0) = 𝑋 ↔ (𝑢‘(𝑁 − 2)) = 𝑋))
83	82	eqcoms 2618	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑢‘(𝑁 − 2)) = (𝑢‘0) → ((𝑢‘0) = 𝑋 ↔ (𝑢‘(𝑁 − 2)) = 𝑋))
84	83	biimpac 502	. . . . . . . . . . . . . . . 16 ⊢ (((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0)) → (𝑢‘(𝑁 − 2)) = 𝑋)
85	84	adantl 481	. . . . . . . . . . . . . . 15 ⊢ (((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0))) → (𝑢‘(𝑁 − 2)) = 𝑋)
86	81, 85	sylan9eq 2664	. . . . . . . . . . . . . 14 ⊢ (((#‘𝑝) = 𝑁 ∧ ((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0)))) → (𝑢‘((#‘𝑝) − 2)) = 𝑋)
87	86	ad4ant24 1290	. . . . . . . . . . . . 13 ⊢ ((((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) ∧ ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0))) ∧ ((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0)))) → (𝑢‘((#‘𝑝) − 2)) = 𝑋)
88	79, 87	eqtr4d 2647	. . . . . . . . . . . 12 ⊢ ((((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) ∧ ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0))) ∧ ((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0)))) → (𝑝‘((#‘𝑝) − 2)) = (𝑢‘((#‘𝑝) − 2)))
89	88	adantl 481	. . . . . . . . . . 11 ⊢ (((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) ∧ (((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) ∧ ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0))) ∧ ((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0))))) → (𝑝‘((#‘𝑝) − 2)) = (𝑢‘((#‘𝑝) − 2)))
90	89	biantrurd 528	. . . . . . . . . 10 ⊢ (((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) ∧ (((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) ∧ ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0))) ∧ ((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0))))) → (((𝑝 substr ⟨0, ((#‘𝑝) − 2)⟩) = (𝑢 substr ⟨0, ((#‘𝑝) − 2)⟩) ∧ ( lastS ‘𝑝) = ( lastS ‘𝑢)) ↔ ((𝑝‘((#‘𝑝) − 2)) = (𝑢‘((#‘𝑝) − 2)) ∧ ((𝑝 substr ⟨0, ((#‘𝑝) − 2)⟩) = (𝑢 substr ⟨0, ((#‘𝑝) − 2)⟩) ∧ ( lastS ‘𝑝) = ( lastS ‘𝑢)))))
91	80	opeq2d 4347	. . . . . . . . . . . . . . 15 ⊢ ((#‘𝑝) = 𝑁 → ⟨0, ((#‘𝑝) − 2)⟩ = ⟨0, (𝑁 − 2)⟩)
92	91	oveq2d 6565	. . . . . . . . . . . . . 14 ⊢ ((#‘𝑝) = 𝑁 → (𝑝 substr ⟨0, ((#‘𝑝) − 2)⟩) = (𝑝 substr ⟨0, (𝑁 − 2)⟩))
93	91	oveq2d 6565	. . . . . . . . . . . . . 14 ⊢ ((#‘𝑝) = 𝑁 → (𝑢 substr ⟨0, ((#‘𝑝) − 2)⟩) = (𝑢 substr ⟨0, (𝑁 − 2)⟩))
94	92, 93	eqeq12d 2625	. . . . . . . . . . . . 13 ⊢ ((#‘𝑝) = 𝑁 → ((𝑝 substr ⟨0, ((#‘𝑝) − 2)⟩) = (𝑢 substr ⟨0, ((#‘𝑝) − 2)⟩) ↔ (𝑝 substr ⟨0, (𝑁 − 2)⟩) = (𝑢 substr ⟨0, (𝑁 − 2)⟩)))
95	94	ad3antlr 763	. . . . . . . . . . . 12 ⊢ ((((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) ∧ ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0))) ∧ ((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0)))) → ((𝑝 substr ⟨0, ((#‘𝑝) − 2)⟩) = (𝑢 substr ⟨0, ((#‘𝑝) − 2)⟩) ↔ (𝑝 substr ⟨0, (𝑁 − 2)⟩) = (𝑢 substr ⟨0, (𝑁 − 2)⟩)))
96	95	adantl 481	. . . . . . . . . . 11 ⊢ (((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) ∧ (((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) ∧ ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0))) ∧ ((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0))))) → ((𝑝 substr ⟨0, ((#‘𝑝) − 2)⟩) = (𝑢 substr ⟨0, ((#‘𝑝) − 2)⟩) ↔ (𝑝 substr ⟨0, (𝑁 − 2)⟩) = (𝑢 substr ⟨0, (𝑁 − 2)⟩)))
97		lsw 13204	. . . . . . . . . . . . . . 15 ⊢ (𝑝 ∈ Word 𝑉 → ( lastS ‘𝑝) = (𝑝‘((#‘𝑝) − 1)))
98		oveq1 6556	. . . . . . . . . . . . . . . 16 ⊢ ((#‘𝑝) = 𝑁 → ((#‘𝑝) − 1) = (𝑁 − 1))
99	98	fveq2d 6107	. . . . . . . . . . . . . . 15 ⊢ ((#‘𝑝) = 𝑁 → (𝑝‘((#‘𝑝) − 1)) = (𝑝‘(𝑁 − 1)))
100	97, 99	sylan9eq 2664	. . . . . . . . . . . . . 14 ⊢ ((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) → ( lastS ‘𝑝) = (𝑝‘(𝑁 − 1)))
101	100	adantr 480	. . . . . . . . . . . . 13 ⊢ (((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) ∧ ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0))) → ( lastS ‘𝑝) = (𝑝‘(𝑁 − 1)))
102		lsw 13204	. . . . . . . . . . . . . . . 16 ⊢ (𝑢 ∈ Word 𝑉 → ( lastS ‘𝑢) = (𝑢‘((#‘𝑢) − 1)))
103	102	adantr 480	. . . . . . . . . . . . . . 15 ⊢ ((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) → ( lastS ‘𝑢) = (𝑢‘((#‘𝑢) − 1)))
104		oveq1 6556	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑁 = (#‘𝑢) → (𝑁 − 1) = ((#‘𝑢) − 1))
105	104	eqcoms 2618	. . . . . . . . . . . . . . . . . 18 ⊢ ((#‘𝑢) = 𝑁 → (𝑁 − 1) = ((#‘𝑢) − 1))
106	105	fveq2d 6107	. . . . . . . . . . . . . . . . 17 ⊢ ((#‘𝑢) = 𝑁 → (𝑢‘(𝑁 − 1)) = (𝑢‘((#‘𝑢) − 1)))
107	106	eqeq2d 2620	. . . . . . . . . . . . . . . 16 ⊢ ((#‘𝑢) = 𝑁 → (( lastS ‘𝑢) = (𝑢‘(𝑁 − 1)) ↔ ( lastS ‘𝑢) = (𝑢‘((#‘𝑢) − 1))))
108	107	adantl 481	. . . . . . . . . . . . . . 15 ⊢ ((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) → (( lastS ‘𝑢) = (𝑢‘(𝑁 − 1)) ↔ ( lastS ‘𝑢) = (𝑢‘((#‘𝑢) − 1))))
109	103, 108	mpbird 246	. . . . . . . . . . . . . 14 ⊢ ((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) → ( lastS ‘𝑢) = (𝑢‘(𝑁 − 1)))
110	109	adantr 480	. . . . . . . . . . . . 13 ⊢ (((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0))) → ( lastS ‘𝑢) = (𝑢‘(𝑁 − 1)))
111	101, 110	eqeqan12d 2626	. . . . . . . . . . . 12 ⊢ ((((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) ∧ ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0))) ∧ ((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0)))) → (( lastS ‘𝑝) = ( lastS ‘𝑢) ↔ (𝑝‘(𝑁 − 1)) = (𝑢‘(𝑁 − 1))))
112	111	adantl 481	. . . . . . . . . . 11 ⊢ (((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) ∧ (((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) ∧ ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0))) ∧ ((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0))))) → (( lastS ‘𝑝) = ( lastS ‘𝑢) ↔ (𝑝‘(𝑁 − 1)) = (𝑢‘(𝑁 − 1))))
113	96, 112	anbi12d 743	. . . . . . . . . 10 ⊢ (((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) ∧ (((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) ∧ ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0))) ∧ ((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0))))) → (((𝑝 substr ⟨0, ((#‘𝑝) − 2)⟩) = (𝑢 substr ⟨0, ((#‘𝑝) − 2)⟩) ∧ ( lastS ‘𝑝) = ( lastS ‘𝑢)) ↔ ((𝑝 substr ⟨0, (𝑁 − 2)⟩) = (𝑢 substr ⟨0, (𝑁 − 2)⟩) ∧ (𝑝‘(𝑁 − 1)) = (𝑢‘(𝑁 − 1)))))
114	67, 90, 113	3bitr2d 295	. . . . . . . . 9 ⊢ (((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) ∧ (((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) ∧ ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0))) ∧ ((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0))))) → (((𝑝 substr ⟨0, ((#‘𝑝) − 2)⟩) = (𝑢 substr ⟨0, ((#‘𝑝) − 2)⟩) ∧ (𝑝‘((#‘𝑝) − 2)) = (𝑢‘((#‘𝑝) − 2)) ∧ ( lastS ‘𝑝) = ( lastS ‘𝑢)) ↔ ((𝑝 substr ⟨0, (𝑁 − 2)⟩) = (𝑢 substr ⟨0, (𝑁 − 2)⟩) ∧ (𝑝‘(𝑁 − 1)) = (𝑢‘(𝑁 − 1)))))
115	57, 65, 114	3bitr2d 295	. . . . . . . 8 ⊢ (((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) ∧ (((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) ∧ ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0))) ∧ ((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0))))) → (𝑝 = 𝑢 ↔ ((𝑝 substr ⟨0, (𝑁 − 2)⟩) = (𝑢 substr ⟨0, (𝑁 − 2)⟩) ∧ (𝑝‘(𝑁 − 1)) = (𝑢‘(𝑁 − 1)))))
116	115	exbiri 650	. . . . . . 7 ⊢ ((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) → ((((𝑝 ∈ Word 𝑉 ∧ (#‘𝑝) = 𝑁) ∧ ((𝑝‘0) = 𝑋 ∧ (𝑝‘(𝑁 − 2)) = (𝑝‘0))) ∧ ((𝑢 ∈ Word 𝑉 ∧ (#‘𝑢) = 𝑁) ∧ ((𝑢‘0) = 𝑋 ∧ (𝑢‘(𝑁 − 2)) = (𝑢‘0)))) → (((𝑝 substr ⟨0, (𝑁 − 2)⟩) = (𝑢 substr ⟨0, (𝑁 − 2)⟩) ∧ (𝑝‘(𝑁 − 1)) = (𝑢‘(𝑁 − 1))) → 𝑝 = 𝑢)))
117	22, 30, 116	syl2and 499	. . . . . 6 ⊢ ((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) → ((𝑝 ∈ (𝑋𝐶𝑁) ∧ 𝑢 ∈ (𝑋𝐶𝑁)) → (((𝑝 substr ⟨0, (𝑁 − 2)⟩) = (𝑢 substr ⟨0, (𝑁 − 2)⟩) ∧ (𝑝‘(𝑁 − 1)) = (𝑢‘(𝑁 − 1))) → 𝑝 = 𝑢)))
118	117	imp 444	. . . . 5 ⊢ (((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) ∧ (𝑝 ∈ (𝑋𝐶𝑁) ∧ 𝑢 ∈ (𝑋𝐶𝑁))) → (((𝑝 substr ⟨0, (𝑁 − 2)⟩) = (𝑢 substr ⟨0, (𝑁 − 2)⟩) ∧ (𝑝‘(𝑁 − 1)) = (𝑢‘(𝑁 − 1))) → 𝑝 = 𝑢))
119	13, 118	syl5bi 231	. . . 4 ⊢ (((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) ∧ (𝑝 ∈ (𝑋𝐶𝑁) ∧ 𝑢 ∈ (𝑋𝐶𝑁))) → (⟨(𝑝 substr ⟨0, (𝑁 − 2)⟩), (𝑝‘(𝑁 − 1))⟩ = ⟨(𝑢 substr ⟨0, (𝑁 − 2)⟩), (𝑢‘(𝑁 − 1))⟩ → 𝑝 = 𝑢))
120	10, 119	sylbid 229	. . 3 ⊢ (((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) ∧ (𝑝 ∈ (𝑋𝐶𝑁) ∧ 𝑢 ∈ (𝑋𝐶𝑁))) → ((𝑇‘𝑝) = (𝑇‘𝑢) → 𝑝 = 𝑢))
121	120	ralrimivva 2954	. 2 ⊢ ((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) → ∀𝑝 ∈ (𝑋𝐶𝑁)∀𝑢 ∈ (𝑋𝐶𝑁)((𝑇‘𝑝) = (𝑇‘𝑢) → 𝑝 = 𝑢))
122		dff13 6416	. 2 ⊢ (𝑇:(𝑋𝐶𝑁)–1-1→((𝑋𝐹(𝑁 − 2)) × (𝐺 NeighbVtx 𝑋)) ↔ (𝑇:(𝑋𝐶𝑁)⟶((𝑋𝐹(𝑁 − 2)) × (𝐺 NeighbVtx 𝑋)) ∧ ∀𝑝 ∈ (𝑋𝐶𝑁)∀𝑢 ∈ (𝑋𝐶𝑁)((𝑇‘𝑝) = (𝑇‘𝑢) → 𝑝 = 𝑢)))
123	5, 121, 122	sylanbrc 695	1 ⊢ ((𝐺 ∈ USGraph ∧ 𝑋 ∈ 𝑉 ∧ 𝑁 ∈ (ℤ_≥‘3)) → 𝑇:(𝑋𝐶𝑁)–1-1→((𝑋𝐹(𝑁 − 2)) × (𝐺 NeighbVtx 𝑋)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 195 ∧ wa 383 ∧ w3a 1031 = wceq 1475 ∈ wcel 1977 ∀wral 2896 {crab 2900 ⟨cop 4131 class class class wbr 4583 ↦ cmpt 4643 × cxp 5036 ⟶wf 5800 –1-1→wf1 5801 ‘cfv 5804 (class class class)co 6549 ↦ cmpt2 6551 ℝcr 9814 0cc0 9815 1c1 9816 < clt 9953 ≤ cle 9954 − cmin 10145 ℕcn 10897 2c2 10947 3c3 10948 ℤcz 11254 ℤ_≥cuz 11563 #chash 12979 Word cword 13146 lastS clsw 13147 substr csubstr 13150 Vtxcvtx 25673 USGraph cusgr 40379 NeighbVtx cnbgr 40550 ClWWalkSN cclwwlksn 41184

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-rep 4699 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-cnex 9871 ax-resscn 9872 ax-1cn 9873 ax-icn 9874 ax-addcl 9875 ax-addrcl 9876 ax-mulcl 9877 ax-mulrcl 9878 ax-mulcom 9879 ax-addass 9880 ax-mulass 9881 ax-distr 9882 ax-i2m1 9883 ax-1ne0 9884 ax-1rid 9885 ax-rnegex 9886 ax-rrecex 9887 ax-cnre 9888 ax-pre-lttri 9889 ax-pre-lttrn 9890 ax-pre-ltadd 9891 ax-pre-mulgt0 9892

This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 df-3an 1033 df-tru 1478 df-fal 1481 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-nel 2783 df-ral 2901 df-rex 2902 df-reu 2903 df-rmo 2904 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-pss 3556 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-tp 4130 df-op 4132 df-uni 4373 df-int 4411 df-iun 4457 df-br 4584 df-opab 4644 df-mpt 4645 df-tr 4681 df-eprel 4949 df-id 4953 df-po 4959 df-so 4960 df-fr 4997 df-we 4999 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-pred 5597 df-ord 5643 df-on 5644 df-lim 5645 df-suc 5646 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-riota 6511 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-om 6958 df-1st 7059 df-2nd 7060 df-wrecs 7294 df-recs 7355 df-rdg 7393 df-1o 7447 df-2o 7448 df-oadd 7451 df-er 7629 df-map 7746 df-pm 7747 df-en 7842 df-dom 7843 df-sdom 7844 df-fin 7845 df-card 8648 df-cda 8873 df-pnf 9955 df-mnf 9956 df-xr 9957 df-ltxr 9958 df-le 9959 df-sub 10147 df-neg 10148 df-nn 10898 df-2 10956 df-3 10957 df-n0 11170 df-z 11255 df-uz 11564 df-fz 12198 df-fzo 12335 df-hash 12980 df-word 13154 df-lsw 13155 df-concat 13156 df-s1 13157 df-substr 13158 df-s2 13444 df-upgr 25749 df-umgr 25750 df-edga 25793 df-usgr 40381 df-nbgr 40554 df-clwwlks 41185 df-clwwlksn 41186

This theorem is referenced by: av-numclwlk1lem2f1o 41526

W3C validator