swrdf1 - Mathbox for Thierry Arnoux

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Theorem swrdf1 32911

Description: Condition for a subword to be injective. (Contributed by Thierry Arnoux, 12-Dec-2023.)

**Hypotheses**
Ref	Expression
swrdf1.w	⊢ (𝜑 → 𝑊 ∈ Word 𝐷)
swrdf1.m	⊢ (𝜑 → 𝑀 ∈ (0...𝑁))
swrdf1.n	⊢ (𝜑 → 𝑁 ∈ (0...(♯‘𝑊)))
swrdf1.1	⊢ (𝜑 → 𝑊:dom 𝑊–1-1→𝐷)

**Assertion**
Ref	Expression
swrdf1	⊢ (𝜑 → (𝑊 substr ⟨𝑀, 𝑁⟩):dom (𝑊 substr ⟨𝑀, 𝑁⟩)–1-1→𝐷)

Proof of Theorem swrdf1 Dummy variables 𝑖 𝑗 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		swrdf1.w	. . . 4 ⊢ (𝜑 → 𝑊 ∈ Word 𝐷)
2		swrdf1.m	. . . 4 ⊢ (𝜑 → 𝑀 ∈ (0...𝑁))
3		swrdf1.n	. . . 4 ⊢ (𝜑 → 𝑁 ∈ (0...(♯‘𝑊)))
4		swrdf 14575	. . . 4 ⊢ ((𝑊 ∈ Word 𝐷 ∧ 𝑀 ∈ (0...𝑁) ∧ 𝑁 ∈ (0...(♯‘𝑊))) → (𝑊 substr ⟨𝑀, 𝑁⟩):(0..^(𝑁 − 𝑀))⟶𝐷)
5	1, 2, 3, 4	syl3anc 1373	. . 3 ⊢ (𝜑 → (𝑊 substr ⟨𝑀, 𝑁⟩):(0..^(𝑁 − 𝑀))⟶𝐷)
6	5	ffdmd 6686	. 2 ⊢ (𝜑 → (𝑊 substr ⟨𝑀, 𝑁⟩):dom (𝑊 substr ⟨𝑀, 𝑁⟩)⟶𝐷)
7		fzossz 13600	. . . . . . . 8 ⊢ (0..^(𝑁 − 𝑀)) ⊆ ℤ
8		simpllr 775	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗)) → 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩))
9	5	fdmd 6666	. . . . . . . . . 10 ⊢ (𝜑 → dom (𝑊 substr ⟨𝑀, 𝑁⟩) = (0..^(𝑁 − 𝑀)))
10	9	ad3antrrr 730	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗)) → dom (𝑊 substr ⟨𝑀, 𝑁⟩) = (0..^(𝑁 − 𝑀)))
11	8, 10	eleqtrd 2830	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗)) → 𝑖 ∈ (0..^(𝑁 − 𝑀)))
12	7, 11	sselid 3935	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗)) → 𝑖 ∈ ℤ)
13	12	zcnd 12599	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗)) → 𝑖 ∈ ℂ)
14		simplr 768	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗)) → 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩))
15	14, 10	eleqtrd 2830	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗)) → 𝑗 ∈ (0..^(𝑁 − 𝑀)))
16	7, 15	sselid 3935	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗)) → 𝑗 ∈ ℤ)
17	16	zcnd 12599	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗)) → 𝑗 ∈ ℂ)
18	2	elfzelzd 13446	. . . . . . . 8 ⊢ (𝜑 → 𝑀 ∈ ℤ)
19	18	ad3antrrr 730	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗)) → 𝑀 ∈ ℤ)
20	19	zcnd 12599	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗)) → 𝑀 ∈ ℂ)
21		swrdf1.1	. . . . . . . 8 ⊢ (𝜑 → 𝑊:dom 𝑊–1-1→𝐷)
22	21	ad3antrrr 730	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗)) → 𝑊:dom 𝑊–1-1→𝐷)
23		elfzuz 13441	. . . . . . . . . . . 12 ⊢ (𝑀 ∈ (0...𝑁) → 𝑀 ∈ (ℤ_≥‘0))
24		fzoss1 13607	. . . . . . . . . . . 12 ⊢ (𝑀 ∈ (ℤ_≥‘0) → (𝑀..^𝑁) ⊆ (0..^𝑁))
25	2, 23, 24	3syl 18	. . . . . . . . . . 11 ⊢ (𝜑 → (𝑀..^𝑁) ⊆ (0..^𝑁))
26		elfzuz3 13442	. . . . . . . . . . . 12 ⊢ (𝑁 ∈ (0...(♯‘𝑊)) → (♯‘𝑊) ∈ (ℤ_≥‘𝑁))
27		fzoss2 13608	. . . . . . . . . . . 12 ⊢ ((♯‘𝑊) ∈ (ℤ_≥‘𝑁) → (0..^𝑁) ⊆ (0..^(♯‘𝑊)))
28	3, 26, 27	3syl 18	. . . . . . . . . . 11 ⊢ (𝜑 → (0..^𝑁) ⊆ (0..^(♯‘𝑊)))
29	25, 28	sstrd 3948	. . . . . . . . . 10 ⊢ (𝜑 → (𝑀..^𝑁) ⊆ (0..^(♯‘𝑊)))
30	29	ad3antrrr 730	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗)) → (𝑀..^𝑁) ⊆ (0..^(♯‘𝑊)))
31	3	elfzelzd 13446	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑁 ∈ ℤ)
32	31	ad3antrrr 730	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗)) → 𝑁 ∈ ℤ)
33		fzoaddel2 13641	. . . . . . . . . 10 ⊢ ((𝑖 ∈ (0..^(𝑁 − 𝑀)) ∧ 𝑁 ∈ ℤ ∧ 𝑀 ∈ ℤ) → (𝑖 + 𝑀) ∈ (𝑀..^𝑁))
34	11, 32, 19, 33	syl3anc 1373	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗)) → (𝑖 + 𝑀) ∈ (𝑀..^𝑁))
35	30, 34	sseldd 3938	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗)) → (𝑖 + 𝑀) ∈ (0..^(♯‘𝑊)))
36		wrddm 14446	. . . . . . . . . 10 ⊢ (𝑊 ∈ Word 𝐷 → dom 𝑊 = (0..^(♯‘𝑊)))
37	1, 36	syl 17	. . . . . . . . 9 ⊢ (𝜑 → dom 𝑊 = (0..^(♯‘𝑊)))
38	37	ad3antrrr 730	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗)) → dom 𝑊 = (0..^(♯‘𝑊)))
39	35, 38	eleqtrrd 2831	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗)) → (𝑖 + 𝑀) ∈ dom 𝑊)
40		fzoaddel2 13641	. . . . . . . . . 10 ⊢ ((𝑗 ∈ (0..^(𝑁 − 𝑀)) ∧ 𝑁 ∈ ℤ ∧ 𝑀 ∈ ℤ) → (𝑗 + 𝑀) ∈ (𝑀..^𝑁))
41	15, 32, 19, 40	syl3anc 1373	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗)) → (𝑗 + 𝑀) ∈ (𝑀..^𝑁))
42	30, 41	sseldd 3938	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗)) → (𝑗 + 𝑀) ∈ (0..^(♯‘𝑊)))
43	42, 38	eleqtrrd 2831	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗)) → (𝑗 + 𝑀) ∈ dom 𝑊)
44		simpr 484	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗)) → ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗))
45	1	ad3antrrr 730	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗)) → 𝑊 ∈ Word 𝐷)
46	2	ad3antrrr 730	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗)) → 𝑀 ∈ (0...𝑁))
47	3	ad3antrrr 730	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗)) → 𝑁 ∈ (0...(♯‘𝑊)))
48		swrdfv 14573	. . . . . . . . 9 ⊢ (((𝑊 ∈ Word 𝐷 ∧ 𝑀 ∈ (0...𝑁) ∧ 𝑁 ∈ (0...(♯‘𝑊))) ∧ 𝑖 ∈ (0..^(𝑁 − 𝑀))) → ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = (𝑊‘(𝑖 + 𝑀)))
49	45, 46, 47, 11, 48	syl31anc 1375	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗)) → ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = (𝑊‘(𝑖 + 𝑀)))
50		swrdfv 14573	. . . . . . . . 9 ⊢ (((𝑊 ∈ Word 𝐷 ∧ 𝑀 ∈ (0...𝑁) ∧ 𝑁 ∈ (0...(♯‘𝑊))) ∧ 𝑗 ∈ (0..^(𝑁 − 𝑀))) → ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗) = (𝑊‘(𝑗 + 𝑀)))
51	45, 46, 47, 15, 50	syl31anc 1375	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗)) → ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗) = (𝑊‘(𝑗 + 𝑀)))
52	44, 49, 51	3eqtr3d 2772	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗)) → (𝑊‘(𝑖 + 𝑀)) = (𝑊‘(𝑗 + 𝑀)))
53		f1veqaeq 7197	. . . . . . . . 9 ⊢ ((𝑊:dom 𝑊–1-1→𝐷 ∧ ((𝑖 + 𝑀) ∈ dom 𝑊 ∧ (𝑗 + 𝑀) ∈ dom 𝑊)) → ((𝑊‘(𝑖 + 𝑀)) = (𝑊‘(𝑗 + 𝑀)) → (𝑖 + 𝑀) = (𝑗 + 𝑀)))
54	53	anassrs 467	. . . . . . . 8 ⊢ (((𝑊:dom 𝑊–1-1→𝐷 ∧ (𝑖 + 𝑀) ∈ dom 𝑊) ∧ (𝑗 + 𝑀) ∈ dom 𝑊) → ((𝑊‘(𝑖 + 𝑀)) = (𝑊‘(𝑗 + 𝑀)) → (𝑖 + 𝑀) = (𝑗 + 𝑀)))
55	54	imp 406	. . . . . . 7 ⊢ ((((𝑊:dom 𝑊–1-1→𝐷 ∧ (𝑖 + 𝑀) ∈ dom 𝑊) ∧ (𝑗 + 𝑀) ∈ dom 𝑊) ∧ (𝑊‘(𝑖 + 𝑀)) = (𝑊‘(𝑗 + 𝑀))) → (𝑖 + 𝑀) = (𝑗 + 𝑀))
56	22, 39, 43, 52, 55	syl1111anc 840	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗)) → (𝑖 + 𝑀) = (𝑗 + 𝑀))
57	13, 17, 20, 56	addcan2ad 11340	. . . . 5 ⊢ ((((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗)) → 𝑖 = 𝑗)
58	57	ex 412	. . . 4 ⊢ (((𝜑 ∧ 𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)) → (((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗) → 𝑖 = 𝑗))
59	58	anasss 466	. . 3 ⊢ ((𝜑 ∧ (𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩) ∧ 𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩))) → (((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗) → 𝑖 = 𝑗))
60	59	ralrimivva 3172	. 2 ⊢ (𝜑 → ∀𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)∀𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)(((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗) → 𝑖 = 𝑗))
61		dff13 7195	. 2 ⊢ ((𝑊 substr ⟨𝑀, 𝑁⟩):dom (𝑊 substr ⟨𝑀, 𝑁⟩)–1-1→𝐷 ↔ ((𝑊 substr ⟨𝑀, 𝑁⟩):dom (𝑊 substr ⟨𝑀, 𝑁⟩)⟶𝐷 ∧ ∀𝑖 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)∀𝑗 ∈ dom (𝑊 substr ⟨𝑀, 𝑁⟩)(((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑖) = ((𝑊 substr ⟨𝑀, 𝑁⟩)‘𝑗) → 𝑖 = 𝑗)))
62	6, 60, 61	sylanbrc 583	1 ⊢ (𝜑 → (𝑊 substr ⟨𝑀, 𝑁⟩):dom (𝑊 substr ⟨𝑀, 𝑁⟩)–1-1→𝐷)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 395 = wceq 1540 ∈ wcel 2109 ∀wral 3044 ⊆ wss 3905 ⟨cop 4585 dom cdm 5623 ⟶wf 6482 –1-1→wf1 6483 ‘cfv 6486 (class class class)co 7353 0cc0 11028 + caddc 11031 − cmin 11365 ℤcz 12489 ℤ_≥cuz 12753 ...cfz 13428 ..^cfzo 13575 ♯chash 14255 Word cword 14438 substr csubstr 14565

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-rep 5221 ax-sep 5238 ax-nul 5248 ax-pow 5307 ax-pr 5374 ax-un 7675 ax-cnex 11084 ax-resscn 11085 ax-1cn 11086 ax-icn 11087 ax-addcl 11088 ax-addrcl 11089 ax-mulcl 11090 ax-mulrcl 11091 ax-mulcom 11092 ax-addass 11093 ax-mulass 11094 ax-distr 11095 ax-i2m1 11096 ax-1ne0 11097 ax-1rid 11098 ax-rnegex 11099 ax-rrecex 11100 ax-cnre 11101 ax-pre-lttri 11102 ax-pre-lttrn 11103 ax-pre-ltadd 11104 ax-pre-mulgt0 11105

This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-reu 3346 df-rab 3397 df-v 3440 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4479 df-pw 4555 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4862 df-int 4900 df-iun 4946 df-br 5096 df-opab 5158 df-mpt 5177 df-tr 5203 df-id 5518 df-eprel 5523 df-po 5531 df-so 5532 df-fr 5576 df-we 5578 df-xp 5629 df-rel 5630 df-cnv 5631 df-co 5632 df-dm 5633 df-rn 5634 df-res 5635 df-ima 5636 df-pred 6253 df-ord 6314 df-on 6315 df-lim 6316 df-suc 6317 df-iota 6442 df-fun 6488 df-fn 6489 df-f 6490 df-f1 6491 df-fo 6492 df-f1o 6493 df-fv 6494 df-riota 7310 df-ov 7356 df-oprab 7357 df-mpo 7358 df-om 7807 df-1st 7931 df-2nd 7932 df-frecs 8221 df-wrecs 8252 df-recs 8301 df-rdg 8339 df-1o 8395 df-er 8632 df-en 8880 df-dom 8881 df-sdom 8882 df-fin 8883 df-card 9854 df-pnf 11170 df-mnf 11171 df-xr 11172 df-ltxr 11173 df-le 11174 df-sub 11367 df-neg 11368 df-nn 12147 df-n0 12403 df-z 12490 df-uz 12754 df-fz 13429 df-fzo 13576 df-hash 14256 df-word 14439 df-substr 14566

This theorem is referenced by: cycpmco2f1 33079

W3C validator