Theorem swrdnnn0nd 14674

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 983	. . . 4 ⊢ (¬ (𝐹 ∈ ℕ0 ∧ 𝐿 ∈ ℕ0) ↔ (¬ 𝐹 ∈ ℕ0 ∨ ¬ 𝐿 ∈ ℕ0))
2		ianor 983	. . . . . . 7 ⊢ (¬ (𝐹 ∈ ℤ ∧ 0 ≤ 𝐹) ↔ (¬ 𝐹 ∈ ℤ ∨ ¬ 0 ≤ 𝐹))
3		elnn0z 12601	. . . . . . 7 ⊢ (𝐹 ∈ ℕ0 ↔ (𝐹 ∈ ℤ ∧ 0 ≤ 𝐹))
4	2, 3	xchnxbir 333	. . . . . 6 ⊢ (¬ 𝐹 ∈ ℕ0 ↔ (¬ 𝐹 ∈ ℤ ∨ ¬ 0 ≤ 𝐹))
5		ianor 983	. . . . . . 7 ⊢ (¬ (𝐿 ∈ ℤ ∧ 0 ≤ 𝐿) ↔ (¬ 𝐿 ∈ ℤ ∨ ¬ 0 ≤ 𝐿))
6		elnn0z 12601	. . . . . . 7 ⊢ (𝐿 ∈ ℕ0 ↔ (𝐿 ∈ ℤ ∧ 0 ≤ 𝐿))
7	5, 6	xchnxbir 333	. . . . . 6 ⊢ (¬ 𝐿 ∈ ℕ0 ↔ (¬ 𝐿 ∈ ℤ ∨ ¬ 0 ≤ 𝐿))
8	4, 7	orbi12i 914	. . . . 5 ⊢ ((¬ 𝐹 ∈ ℕ0 ∨ ¬ 𝐿 ∈ ℕ0) ↔ ((¬ 𝐹 ∈ ℤ ∨ ¬ 0 ≤ 𝐹) ∨ (¬ 𝐿 ∈ ℤ ∨ ¬ 0 ≤ 𝐿)))
9		or4 926	. . . . . 6 ⊢ (((¬ 𝐹 ∈ ℤ ∨ ¬ 0 ≤ 𝐹) ∨ (¬ 𝐿 ∈ ℤ ∨ ¬ 0 ≤ 𝐿)) ↔ ((¬ 𝐹 ∈ ℤ ∨ ¬ 𝐿 ∈ ℤ) ∨ (¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿)))
10		ianor 983	. . . . . . . 8 ⊢ (¬ (𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) ↔ (¬ 𝐹 ∈ ℤ ∨ ¬ 𝐿 ∈ ℤ))
11	10	bicomi 224	. . . . . . 7 ⊢ ((¬ 𝐹 ∈ ℤ ∨ ¬ 𝐿 ∈ ℤ) ↔ ¬ (𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ))
12	11	orbi1i 913	. . . . . 6 ⊢ (((¬ 𝐹 ∈ ℤ ∨ ¬ 𝐿 ∈ ℤ) ∨ (¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿)) ↔ (¬ (𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) ∨ (¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿)))
13	9, 12	bitri 275	. . . . 5 ⊢ (((¬ 𝐹 ∈ ℤ ∨ ¬ 0 ≤ 𝐹) ∨ (¬ 𝐿 ∈ ℤ ∨ ¬ 0 ≤ 𝐿)) ↔ (¬ (𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) ∨ (¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿)))
14	8, 13	bitri 275	. . . 4 ⊢ ((¬ 𝐹 ∈ ℕ0 ∨ ¬ 𝐿 ∈ ℕ0) ↔ (¬ (𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) ∨ (¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿)))
15	1, 14	bitri 275	. . 3 ⊢ (¬ (𝐹 ∈ ℕ0 ∧ 𝐿 ∈ ℕ0) ↔ (¬ (𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) ∨ (¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿)))
16		swrdnznd 14660	. . . . 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 315	. . . . . 6 ⊢ ((𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) ↔ ¬ ¬ (𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ))
19		zre 12592	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝐹 ∈ ℤ → 𝐹 ∈ ℝ)
20		0red 11238	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝐹 ∈ ℤ → 0 ∈ ℝ)
21	19, 20	jca 511	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝐹 ∈ ℤ → (𝐹 ∈ ℝ ∧ 0 ∈ ℝ))
22	21	3ad2ant2 1134	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → (𝐹 ∈ ℝ ∧ 0 ∈ ℝ))
23		ltnle 11314	. . . . . . . . . . . . . . . . . 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 867	. . . . . . . . . . . . . . . . 17 ⊢ (𝐹 < 0 → (𝐹 < 0 ∨ 𝐿 ≤ 𝐹))
26	24, 25	biimtrrdi 254	. . . . . . . . . . . . . . . 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 315	. . . . . . . . . . . . . . . . . . 19 ⊢ (0 ≤ 𝐹 ↔ ¬ ¬ 0 ≤ 𝐹)
29	28	a1i 11	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → (0 ≤ 𝐹 ↔ ¬ ¬ 0 ≤ 𝐹))
30		zre 12592	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝐿 ∈ ℤ → 𝐿 ∈ ℝ)
31		0red 11238	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝐿 ∈ ℤ → 0 ∈ ℝ)
32	30, 31	jca 511	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝐿 ∈ ℤ → (𝐿 ∈ ℝ ∧ 0 ∈ ℝ))
33	32	3ad2ant3 1135	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → (𝐿 ∈ ℝ ∧ 0 ∈ ℝ))
34		ltnle 11314	. . . . . . . . . . . . . . . . . . 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 1135	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → 𝐿 ∈ ℝ)
38		0red 11238	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → 0 ∈ ℝ)
39	19	3ad2ant2 1134	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → 𝐹 ∈ ℝ)
40		ltleletr 11328	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝐿 ∈ ℝ ∧ 0 ∈ ℝ ∧ 𝐹 ∈ ℝ) → ((𝐿 < 0 ∧ 0 ≤ 𝐹) → 𝐿 ≤ 𝐹))
41	37, 38, 39, 40	syl3anc 1373	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → ((𝐿 < 0 ∧ 0 ≤ 𝐹) → 𝐿 ≤ 𝐹))
42		olc 868	. . . . . . . . . . . . . . . . . . 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 465	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → ((0 ≤ 𝐹 ∧ 𝐿 < 0) → (𝐹 < 0 ∨ 𝐿 ≤ 𝐹)))
45	36, 44	sylbird 260	. . . . . . . . . . . . . . . 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 1060	. . . . . . . . . . . . . 14 ⊢ ((¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿) → ((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → (𝐹 < 0 ∨ 𝐿 ≤ 𝐹)))
48	47	impcom 407	. . . . . . . . . . . . 13 ⊢ (((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) ∧ (¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿)) → (𝐹 < 0 ∨ 𝐿 ≤ 𝐹))
49	48	orcd 873	. . . . . . . . . . . 12 ⊢ (((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) ∧ (¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿)) → ((𝐹 < 0 ∨ 𝐿 ≤ 𝐹) ∨ (♯‘𝑆) < 𝐿))
50		df-3or 1087	. . . . . . . . . . . 12 ⊢ ((𝐹 < 0 ∨ 𝐿 ≤ 𝐹 ∨ (♯‘𝑆) < 𝐿) ↔ ((𝐹 < 0 ∨ 𝐿 ≤ 𝐹) ∨ (♯‘𝑆) < 𝐿))
51	49, 50	sylibr 234	. . . . . . . . . . 11 ⊢ (((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) ∧ (¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿)) → (𝐹 < 0 ∨ 𝐿 ≤ 𝐹 ∨ (♯‘𝑆) < 𝐿))
52		swrdnd 14672	. . . . . . . . . . . 12 ⊢ ((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → ((𝐹 < 0 ∨ 𝐿 ≤ 𝐹 ∨ (♯‘𝑆) < 𝐿) → (𝑆 substr ⟨𝐹, 𝐿⟩) = ∅))
53	52	imp 406	. . . . . . . . . . 11 ⊢ (((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) ∧ (𝐹 < 0 ∨ 𝐿 ≤ 𝐹 ∨ (♯‘𝑆) < 𝐿)) → (𝑆 substr ⟨𝐹, 𝐿⟩) = ∅)
54	51, 53	syldan 591	. . . . . . . . . 10 ⊢ (((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) ∧ (¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿)) → (𝑆 substr ⟨𝐹, 𝐿⟩) = ∅)
55	54	ex 412	. . . . . . . . 9 ⊢ ((𝑆 ∈ Word 𝑉 ∧ 𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → ((¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿) → (𝑆 substr ⟨𝐹, 𝐿⟩) = ∅))
56	55	3expb 1120	. . . . . . . 8 ⊢ ((𝑆 ∈ Word 𝑉 ∧ (𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ)) → ((¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿) → (𝑆 substr ⟨𝐹, 𝐿⟩) = ∅))
57	56	expcom 413	. . . . . . 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 235	. . . . 5 ⊢ (¬ ¬ (𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) → ((¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿) → (𝑆 ∈ Word 𝑉 → (𝑆 substr ⟨𝐹, 𝐿⟩) = ∅)))
60	59	imp 406	. . . 4 ⊢ ((¬ ¬ (𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) ∧ (¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿)) → (𝑆 ∈ Word 𝑉 → (𝑆 substr ⟨𝐹, 𝐿⟩) = ∅))
61	17, 60	jaoi3 1060	. . 3 ⊢ ((¬ (𝐹 ∈ ℤ ∧ 𝐿 ∈ ℤ) ∨ (¬ 0 ≤ 𝐹 ∨ ¬ 0 ≤ 𝐿)) → (𝑆 ∈ Word 𝑉 → (𝑆 substr ⟨𝐹, 𝐿⟩) = ∅))
62	15, 61	sylbi 217	. 2 ⊢ (¬ (𝐹 ∈ ℕ0 ∧ 𝐿 ∈ ℕ0) → (𝑆 ∈ Word 𝑉 → (𝑆 substr ⟨𝐹, 𝐿⟩) = ∅))
63	62	impcom 407	1 ⊢ ((𝑆 ∈ Word 𝑉 ∧ ¬ (𝐹 ∈ ℕ0 ∧ 𝐿 ∈ ℕ0)) → (𝑆 substr ⟨𝐹, 𝐿⟩) = ∅)

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 206   ∧ wa 395   ∨ wo 847   ∨ w3o 1085   ∧ w3a 1086   = wceq 1540   ∈ wcel 2108  ∅c0 4308  ⟨cop 4607   class class class wbr 5119  ‘cfv 6531  (class class class)co 7405  ℝcr 11128  0cc0 11129   < clt 11269   ≤ cle 11270  ℕ₀cn0 12501  ℤcz 12588  ♯chash 14348  Word cword 14531   substr csubstr 14658

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 2007  ax-8 2110  ax-9 2118  ax-10 2141  ax-11 2157  ax-12 2177  ax-ext 2707  ax-rep 5249  ax-sep 5266  ax-nul 5276  ax-pow 5335  ax-pr 5402  ax-un 7729  ax-cnex 11185  ax-resscn 11186  ax-1cn 11187  ax-icn 11188  ax-addcl 11189  ax-addrcl 11190  ax-mulcl 11191  ax-mulrcl 11192  ax-mulcom 11193  ax-addass 11194  ax-mulass 11195  ax-distr 11196  ax-i2m1 11197  ax-1ne0 11198  ax-1rid 11199  ax-rnegex 11200  ax-rrecex 11201  ax-cnre 11202  ax-pre-lttri 11203  ax-pre-lttrn 11204  ax-pre-ltadd 11205  ax-pre-mulgt0 11206

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 2065  df-mo 2539  df-eu 2568  df-clab 2714  df-cleq 2727  df-clel 2809  df-nfc 2885  df-ne 2933  df-nel 3037  df-ral 3052  df-rex 3061  df-reu 3360  df-rab 3416  df-v 3461  df-sbc 3766  df-csb 3875  df-dif 3929  df-un 3931  df-in 3933  df-ss 3943  df-pss 3946  df-nul 4309  df-if 4501  df-pw 4577  df-sn 4602  df-pr 4604  df-op 4608  df-uni 4884  df-int 4923  df-iun 4969  df-br 5120  df-opab 5182  df-mpt 5202  df-tr 5230  df-id 5548  df-eprel 5553  df-po 5561  df-so 5562  df-fr 5606  df-we 5608  df-xp 5660  df-rel 5661  df-cnv 5662  df-co 5663  df-dm 5664  df-rn 5665  df-res 5666  df-ima 5667  df-pred 6290  df-ord 6355  df-on 6356  df-lim 6357  df-suc 6358  df-iota 6484  df-fun 6533  df-fn 6534  df-f 6535  df-f1 6536  df-fo 6537  df-f1o 6538  df-fv 6539  df-riota 7362  df-ov 7408  df-oprab 7409  df-mpo 7410  df-om 7862  df-1st 7988  df-2nd 7989  df-frecs 8280  df-wrecs 8311  df-recs 8385  df-rdg 8424  df-1o 8480  df-er 8719  df-en 8960  df-dom 8961  df-sdom 8962  df-fin 8963  df-card 9953  df-pnf 11271  df-mnf 11272  df-xr 11273  df-ltxr 11274  df-le 11275  df-sub 11468  df-neg 11469  df-nn 12241  df-n0 12502  df-z 12589  df-uz 12853  df-fz 13525  df-fzo 13672  df-hash 14349  df-word 14532  df-substr 14659

This theorem is referenced by:  swrdnd0  14675  pfxval0  14694