Theorem swrdnnn0nd 14014

Description: The value of a subword operation for arguments not being nonnegative integers is the empty set. (Contributed by AV, 2-Dec-2022.)

Assertion

Ref	Expression
swrdnnn0nd	⊢ ((𝑆 ∈ Word 𝑉 ∧ ¬ (𝐹 ∈ ℕ0 ∧ 𝐿 ∈ ℕ0)) → (𝑆 substr ⟨𝐹, 𝐿⟩) = ∅)

Proof of Theorem swrdnnn0nd

Step	Hyp	Ref	Expression
1		ianor 978	. . . 4 ⊢ (¬ (𝐹 ∈ ℕ0 ∧ 𝐿 ∈ ℕ0) ↔ (¬ 𝐹 ∈ ℕ0 ∨ ¬ 𝐿 ∈ ℕ0))
2		ianor 978	. . . . . . 7 ⊢ (¬ (𝐹 ∈ ℤ ∧ 0 ≤ 𝐹) ↔ (¬ 𝐹 ∈ ℤ ∨ ¬ 0 ≤ 𝐹))
3		elnn0z 11992	. . . . . . 7 ⊢ (𝐹 ∈ ℕ0 ↔ (𝐹 ∈ ℤ ∧ 0 ≤ 𝐹))
4	2, 3	xchnxbir 335	. . . . . 6 ⊢ (¬ 𝐹 ∈ ℕ0 ↔ (¬ 𝐹 ∈ ℤ ∨ ¬ 0 ≤ 𝐹))
5		ianor 978	. . . . . . 7 ⊢ (¬ (𝐿 ∈ ℤ ∧ 0 ≤ 𝐿) ↔ (¬ 𝐿 ∈ ℤ ∨ ¬ 0 ≤ 𝐿))
6		elnn0z 11992	. . . . . . 7 ⊢ (𝐿 ∈ ℕ0 ↔ (𝐿 ∈ ℤ ∧ 0 ≤ 𝐿))
7	5, 6	xchnxbir 335	. . . . . 6 ⊢ (¬ 𝐿 ∈ ℕ0 ↔ (¬ 𝐿 ∈ ℤ ∨ ¬ 0 ≤ 𝐿))
8	4, 7	orbi12i 911	. . . . 5 ⊢ ((¬ 𝐹 ∈ ℕ0 ∨ ¬ 𝐿 ∈ ℕ0) ↔ ((¬ 𝐹 ∈ ℤ ∨ ¬ 0 ≤ 𝐹) ∨ (¬ 𝐿 ∈ ℤ ∨ ¬ 0 ≤ 𝐿)))
9		or4 923	. . . . . 6 ⊢ (((¬ 𝐹 ∈ ℤ ∨ ¬ 0 ≤ 𝐹) ∨ (¬ 𝐿 ∈ ℤ ∨ ¬ 0 ≤ 𝐿)) ↔ ((¬ 𝐹 ∈ ℤ ∨ ¬ 𝐿 ∈ ℤ) ∨ (¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿)))
10		ianor 978	. . . . . . . 8 ⊢ (¬ (𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) ↔ (¬ 𝐹 ∈ ℤ ∨ ¬ 𝐿 ∈ ℤ))
11	10	bicomi 226	. . . . . . 7 ⊢ ((¬ 𝐹 ∈ ℤ ∨ ¬ 𝐿 ∈ ℤ) ↔ ¬ (𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ))
12	11	orbi1i 910	. . . . . 6 ⊢ (((¬ 𝐹 ∈ ℤ ∨ ¬ 𝐿 ∈ ℤ) ∨ (¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿)) ↔ (¬ (𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) ∨ (¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿)))
13	9, 12	bitri 277	. . . . 5 ⊢ (((¬ 𝐹 ∈ ℤ ∨ ¬ 0 ≤ 𝐹) ∨ (¬ 𝐿 ∈ ℤ ∨ ¬ 0 ≤ 𝐿)) ↔ (¬ (𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) ∨ (¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿)))
14	8, 13	bitri 277	. . . 4 ⊢ ((¬ 𝐹 ∈ ℕ0 ∨ ¬ 𝐿 ∈ ℕ0) ↔ (¬ (𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) ∨ (¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿)))
15	1, 14	bitri 277	. . 3 ⊢ (¬ (𝐹 ∈ ℕ0 ∧ 𝐿 ∈ ℕ0) ↔ (¬ (𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) ∨ (¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿)))
16		swrdnznd 14000	. . . . 5 ⊢ (¬ (𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → (𝑆 substr ⟨𝐹, 𝐿⟩) = ∅)
17	16	a1d 25	. . . 4 ⊢ (¬ (𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → (𝑆 ∈ Word 𝑉 → (𝑆 substr ⟨𝐹, 𝐿⟩) = ∅))
18		notnotb 317	. . . . . 6 ⊢ ((𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) ↔ ¬ ¬ (𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ))
19		zre 11983	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝐹 ∈ ℤ → 𝐹 ∈ ℝ)
20		0red 10641	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝐹 ∈ ℤ → 0 ∈ ℝ)
21	19, 20	jca 514	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝐹 ∈ ℤ → (𝐹 ∈ ℝ ∧ 0 ∈ ℝ))
22	21	3ad2ant2 1129	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → (𝐹 ∈ ℝ ∧ 0 ∈ ℝ))
23		ltnle 10717	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐹 ∈ ℝ ∧ 0 ∈ ℝ) → (𝐹 < 0 ↔ ¬ 0 ≤ 𝐹))
24	22, 23	syl 17	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → (𝐹 < 0 ↔ ¬ 0 ≤ 𝐹))
25		orc 863	. . . . . . . . . . . . . . . . 17 ⊢ (𝐹 < 0 → (𝐹 < 0 ∨ 𝐿 ≤ 𝐹))
26	24, 25	syl6bir 256	. . . . . . . . . . . . . . . 16 ⊢ ((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → (¬ 0 ≤ 𝐹 → (𝐹 < 0 ∨ 𝐿 ≤ 𝐹)))
27	26	com12 32	. . . . . . . . . . . . . . 15 ⊢ (¬ 0 ≤ 𝐹 → ((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → (𝐹 < 0 ∨ 𝐿 ≤ 𝐹)))
28		notnotb 317	. . . . . . . . . . . . . . . . . . 19 ⊢ (0 ≤ 𝐹 ↔ ¬ ¬ 0 ≤ 𝐹)
29	28	a1i 11	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → (0 ≤ 𝐹 ↔ ¬ ¬ 0 ≤ 𝐹))
30		zre 11983	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝐿 ∈ ℤ → 𝐿 ∈ ℝ)
31		0red 10641	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝐿 ∈ ℤ → 0 ∈ ℝ)
32	30, 31	jca 514	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝐿 ∈ ℤ → (𝐿 ∈ ℝ ∧ 0 ∈ ℝ))
33	32	3ad2ant3 1130	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → (𝐿 ∈ ℝ ∧ 0 ∈ ℝ))
34		ltnle 10717	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝐿 ∈ ℝ ∧ 0 ∈ ℝ) → (𝐿 < 0 ↔ ¬ 0 ≤ 𝐿))
35	33, 34	syl 17	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → (𝐿 < 0 ↔ ¬ 0 ≤ 𝐿))
36	29, 35	anbi12d 632	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → ((0 ≤ 𝐹 ∧ 𝐿 < 0) ↔ (¬ ¬ 0 ≤ 𝐹 ∧ ¬ 0 ≤ 𝐿)))
37	30	3ad2ant3 1130	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → 𝐿 ∈ ℝ)
38		0red 10641	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → 0 ∈ ℝ)
39	19	3ad2ant2 1129	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → 𝐹 ∈ ℝ)
40		ltleletr 10730	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝐿 ∈ ℝ ∧ 0 ∈ ℝ ∧ 𝐹 ∈ ℝ) → ((𝐿 < 0 ∧ 0 ≤ 𝐹) → 𝐿 ≤ 𝐹))
41	37, 38, 39, 40	syl3anc 1366	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → ((𝐿 < 0 ∧ 0 ≤ 𝐹) → 𝐿 ≤ 𝐹))
42		olc 864	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝐿 ≤ 𝐹 → (𝐹 < 0 ∨ 𝐿 ≤ 𝐹))
43	41, 42	syl6 35	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → ((𝐿 < 0 ∧ 0 ≤ 𝐹) → (𝐹 < 0 ∨ 𝐿 ≤ 𝐹)))
44	43	ancomsd 468	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → ((0 ≤ 𝐹 ∧ 𝐿 < 0) → (𝐹 < 0 ∨ 𝐿 ≤ 𝐹)))
45	36, 44	sylbird 262	. . . . . . . . . . . . . . . 16 ⊢ ((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → ((¬ ¬ 0 ≤ 𝐹 ∧ ¬ 0 ≤ 𝐿) → (𝐹 < 0 ∨ 𝐿 ≤ 𝐹)))
46	45	com12 32	. . . . . . . . . . . . . . 15 ⊢ ((¬ ¬ 0 ≤ 𝐹 ∧ ¬ 0 ≤ 𝐿) → ((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → (𝐹 < 0 ∨ 𝐿 ≤ 𝐹)))
47	27, 46	jaoi3 1055	. . . . . . . . . . . . . 14 ⊢ ((¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿) → ((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → (𝐹 < 0 ∨ 𝐿 ≤ 𝐹)))
48	47	impcom 410	. . . . . . . . . . . . 13 ⊢ (((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) ∧ (¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿)) → (𝐹 < 0 ∨ 𝐿 ≤ 𝐹))
49	48	orcd 869	. . . . . . . . . . . 12 ⊢ (((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) ∧ (¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿)) → ((𝐹 < 0 ∨ 𝐿 ≤ 𝐹) ∨ (♯‘𝑆) < 𝐿))
50		df-3or 1083	. . . . . . . . . . . 12 ⊢ ((𝐹 < 0 ∨ 𝐿 ≤ 𝐹 ∨ (♯‘𝑆) < 𝐿) ↔ ((𝐹 < 0 ∨ 𝐿 ≤ 𝐹) ∨ (♯‘𝑆) < 𝐿))
51	49, 50	sylibr 236	. . . . . . . . . . 11 ⊢ (((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) ∧ (¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿)) → (𝐹 < 0 ∨ 𝐿 ≤ 𝐹 ∨ (♯‘𝑆) < 𝐿))
52		swrdnd 14012	. . . . . . . . . . . 12 ⊢ ((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → ((𝐹 < 0 ∨ 𝐿 ≤ 𝐹 ∨ (♯‘𝑆) < 𝐿) → (𝑆 substr ⟨𝐹, 𝐿⟩) = ∅))
53	52	imp 409	. . . . . . . . . . 11 ⊢ (((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) ∧ (𝐹 < 0 ∨ 𝐿 ≤ 𝐹 ∨ (♯‘𝑆) < 𝐿)) → (𝑆 substr ⟨𝐹, 𝐿⟩) = ∅)
54	51, 53	syldan 593	. . . . . . . . . 10 ⊢ (((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) ∧ (¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿)) → (𝑆 substr ⟨𝐹, 𝐿⟩) = ∅)
55	54	ex 415	. . . . . . . . 9 ⊢ ((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → ((¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿) → (𝑆 substr ⟨𝐹, 𝐿⟩) = ∅))
56	55	3expb 1115	. . . . . . . 8 ⊢ ((𝑆 ∈ Word 𝑉 ∧ (𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ)) → ((¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿) → (𝑆 substr ⟨𝐹, 𝐿⟩) = ∅))
57	56	expcom 416	. . . . . . 7 ⊢ ((𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → (𝑆 ∈ Word 𝑉 → ((¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿) → (𝑆 substr ⟨𝐹, 𝐿⟩) = ∅)))
58	57	com23 86	. . . . . 6 ⊢ ((𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → ((¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿) → (𝑆 ∈ Word 𝑉 → (𝑆 substr ⟨𝐹, 𝐿⟩) = ∅)))
59	18, 58	sylbir 237	. . . . 5 ⊢ (¬ ¬ (𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → ((¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿) → (𝑆 ∈ Word 𝑉 → (𝑆 substr ⟨𝐹, 𝐿⟩) = ∅)))
60	59	imp 409	. . . 4 ⊢ ((¬ ¬ (𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) ∧ (¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿)) → (𝑆 ∈ Word 𝑉 → (𝑆 substr ⟨𝐹, 𝐿⟩) = ∅))
61	17, 60	jaoi3 1055	. . 3 ⊢ ((¬ (𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) ∨ (¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿)) → (𝑆 ∈ Word 𝑉 → (𝑆 substr ⟨𝐹, 𝐿⟩) = ∅))
62	15, 61	sylbi 219	. 2 ⊢ (¬ (𝐹 ∈ ℕ0 ∧ 𝐿 ∈ ℕ0) → (𝑆 ∈ Word 𝑉 → (𝑆 substr ⟨𝐹, 𝐿⟩) = ∅))
63	62	impcom 410	1 ⊢ ((𝑆 ∈ Word 𝑉 ∧ ¬ (𝐹 ∈ ℕ0 ∧ 𝐿 ∈ ℕ0)) → (𝑆 substr ⟨𝐹, 𝐿⟩) = ∅)

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 208   ∧ wa 398   ∨ wo 843   ∨ w3o 1081   ∧ w3a 1082   = wceq 1536   ∈ wcel 2113  ∅c0 4288  ⟨cop 4570   class class class wbr 5063  ‘cfv 6352  (class class class)co 7153  ℝcr 10533  0cc0 10534   < clt 10672   ≤ cle 10673  ℕ₀cn0 11895  ℤcz 11979  ♯chash 13688  Word cword 13859   substr csubstr 13998

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 1969  ax-7 2014  ax-8 2115  ax-9 2123  ax-10 2144  ax-11 2160  ax-12 2176  ax-ext 2792  ax-rep 5187  ax-sep 5200  ax-nul 5207  ax-pow 5263  ax-pr 5327  ax-un 7458  ax-cnex 10590  ax-resscn 10591  ax-1cn 10592  ax-icn 10593  ax-addcl 10594  ax-addrcl 10595  ax-mulcl 10596  ax-mulrcl 10597  ax-mulcom 10598  ax-addass 10599  ax-mulass 10600  ax-distr 10601  ax-i2m1 10602  ax-1ne0 10603  ax-1rid 10604  ax-rnegex 10605  ax-rrecex 10606  ax-cnre 10607  ax-pre-lttri 10608  ax-pre-lttrn 10609  ax-pre-ltadd 10610  ax-pre-mulgt0 10611

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3or 1083  df-3an 1084  df-tru 1539  df-ex 1780  df-nf 1784  df-sb 2069  df-mo 2621  df-eu 2653  df-clab 2799  df-cleq 2813  df-clel 2892  df-nfc 2962  df-ne 3016  df-nel 3123  df-ral 3142  df-rex 3143  df-reu 3144  df-rab 3146  df-v 3495  df-sbc 3771  df-csb 3881  df-dif 3936  df-un 3938  df-in 3940  df-ss 3949  df-pss 3951  df-nul 4289  df-if 4465  df-pw 4538  df-sn 4565  df-pr 4567  df-tp 4569  df-op 4571  df-uni 4836  df-int 4874  df-iun 4918  df-br 5064  df-opab 5126  df-mpt 5144  df-tr 5170  df-id 5457  df-eprel 5462  df-po 5471  df-so 5472  df-fr 5511  df-we 5513  df-xp 5558  df-rel 5559  df-cnv 5560  df-co 5561  df-dm 5562  df-rn 5563  df-res 5564  df-ima 5565  df-pred 6145  df-ord 6191  df-on 6192  df-lim 6193  df-suc 6194  df-iota 6311  df-fun 6354  df-fn 6355  df-f 6356  df-f1 6357  df-fo 6358  df-f1o 6359  df-fv 6360  df-riota 7111  df-ov 7156  df-oprab 7157  df-mpo 7158  df-om 7578  df-1st 7686  df-2nd 7687  df-wrecs 7944  df-recs 8005  df-rdg 8043  df-1o 8099  df-oadd 8103  df-er 8286  df-en 8507  df-dom 8508  df-sdom 8509  df-fin 8510  df-card 9365  df-pnf 10674  df-mnf 10675  df-xr 10676  df-ltxr 10677  df-le 10678  df-sub 10869  df-neg 10870  df-nn 11636  df-n0 11896  df-z 11980  df-uz 12242  df-fz 12891  df-fzo 13032  df-hash 13689  df-word 13860  df-substr 13999

This theorem is referenced by:  swrdnd0  14015  pfxval0  14034