smumullem - Metamath Proof Explorer

	Metamath Proof Explorer		< Previous Next > Nearby theorems
Mirrors > Home > MPE Home > Th. List > smumullem		Structured version Visualization version GIF version

Theorem smumullem 16430

Description: Lemma for smumul 16431. (Contributed by Mario Carneiro, 22-Sep-2016.)

**Hypotheses**
Ref	Expression
smumullem.a	⊢ (𝜑 → 𝐴 ∈ ℤ)
smumullem.b	⊢ (𝜑 → 𝐵 ∈ ℤ)
smumullem.n	⊢ (𝜑 → 𝑁 ∈ ℕ₀)

**Assertion**
Ref	Expression
smumullem	⊢ (𝜑 → (((bits‘𝐴) ∩ (0..^𝑁)) smul (bits‘𝐵)) = (bits‘((𝐴 mod (2↑𝑁)) · 𝐵)))

Proof of Theorem smumullem Dummy variables 𝑘 𝑛 𝑥 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		smumullem.n	. 2 ⊢ (𝜑 → 𝑁 ∈ ℕ₀)
2		oveq2 7414	. . . . . . . . . 10 ⊢ (𝑥 = 0 → (0..^𝑥) = (0..^0))
3		fzo0 13653	. . . . . . . . . 10 ⊢ (0..^0) = ∅
4	2, 3	eqtrdi 2789	. . . . . . . . 9 ⊢ (𝑥 = 0 → (0..^𝑥) = ∅)
5	4	ineq2d 4212	. . . . . . . 8 ⊢ (𝑥 = 0 → ((bits‘𝐴) ∩ (0..^𝑥)) = ((bits‘𝐴) ∩ ∅))
6		in0 4391	. . . . . . . 8 ⊢ ((bits‘𝐴) ∩ ∅) = ∅
7	5, 6	eqtrdi 2789	. . . . . . 7 ⊢ (𝑥 = 0 → ((bits‘𝐴) ∩ (0..^𝑥)) = ∅)
8	7	oveq1d 7421	. . . . . 6 ⊢ (𝑥 = 0 → (((bits‘𝐴) ∩ (0..^𝑥)) smul (bits‘𝐵)) = (∅ smul (bits‘𝐵)))
9		bitsss 16364	. . . . . . 7 ⊢ (bits‘𝐵) ⊆ ℕ₀
10		smu02 16425	. . . . . . 7 ⊢ ((bits‘𝐵) ⊆ ℕ₀ → (∅ smul (bits‘𝐵)) = ∅)
11	9, 10	ax-mp 5	. . . . . 6 ⊢ (∅ smul (bits‘𝐵)) = ∅
12	8, 11	eqtrdi 2789	. . . . 5 ⊢ (𝑥 = 0 → (((bits‘𝐴) ∩ (0..^𝑥)) smul (bits‘𝐵)) = ∅)
13		oveq2 7414	. . . . . . . 8 ⊢ (𝑥 = 0 → (2↑𝑥) = (2↑0))
14		2cn 12284	. . . . . . . . 9 ⊢ 2 ∈ ℂ
15		exp0 14028	. . . . . . . . 9 ⊢ (2 ∈ ℂ → (2↑0) = 1)
16	14, 15	ax-mp 5	. . . . . . . 8 ⊢ (2↑0) = 1
17	13, 16	eqtrdi 2789	. . . . . . 7 ⊢ (𝑥 = 0 → (2↑𝑥) = 1)
18	17	oveq2d 7422	. . . . . 6 ⊢ (𝑥 = 0 → (𝐴 mod (2↑𝑥)) = (𝐴 mod 1))
19	18	fvoveq1d 7428	. . . . 5 ⊢ (𝑥 = 0 → (bits‘((𝐴 mod (2↑𝑥)) · 𝐵)) = (bits‘((𝐴 mod 1) · 𝐵)))
20	12, 19	eqeq12d 2749	. . . 4 ⊢ (𝑥 = 0 → ((((bits‘𝐴) ∩ (0..^𝑥)) smul (bits‘𝐵)) = (bits‘((𝐴 mod (2↑𝑥)) · 𝐵)) ↔ ∅ = (bits‘((𝐴 mod 1) · 𝐵))))
21	20	imbi2d 341	. . 3 ⊢ (𝑥 = 0 → ((𝜑 → (((bits‘𝐴) ∩ (0..^𝑥)) smul (bits‘𝐵)) = (bits‘((𝐴 mod (2↑𝑥)) · 𝐵))) ↔ (𝜑 → ∅ = (bits‘((𝐴 mod 1) · 𝐵)))))
22		oveq2 7414	. . . . . . 7 ⊢ (𝑥 = 𝑘 → (0..^𝑥) = (0..^𝑘))
23	22	ineq2d 4212	. . . . . 6 ⊢ (𝑥 = 𝑘 → ((bits‘𝐴) ∩ (0..^𝑥)) = ((bits‘𝐴) ∩ (0..^𝑘)))
24	23	oveq1d 7421	. . . . 5 ⊢ (𝑥 = 𝑘 → (((bits‘𝐴) ∩ (0..^𝑥)) smul (bits‘𝐵)) = (((bits‘𝐴) ∩ (0..^𝑘)) smul (bits‘𝐵)))
25		oveq2 7414	. . . . . . 7 ⊢ (𝑥 = 𝑘 → (2↑𝑥) = (2↑𝑘))
26	25	oveq2d 7422	. . . . . 6 ⊢ (𝑥 = 𝑘 → (𝐴 mod (2↑𝑥)) = (𝐴 mod (2↑𝑘)))
27	26	fvoveq1d 7428	. . . . 5 ⊢ (𝑥 = 𝑘 → (bits‘((𝐴 mod (2↑𝑥)) · 𝐵)) = (bits‘((𝐴 mod (2↑𝑘)) · 𝐵)))
28	24, 27	eqeq12d 2749	. . . 4 ⊢ (𝑥 = 𝑘 → ((((bits‘𝐴) ∩ (0..^𝑥)) smul (bits‘𝐵)) = (bits‘((𝐴 mod (2↑𝑥)) · 𝐵)) ↔ (((bits‘𝐴) ∩ (0..^𝑘)) smul (bits‘𝐵)) = (bits‘((𝐴 mod (2↑𝑘)) · 𝐵))))
29	28	imbi2d 341	. . 3 ⊢ (𝑥 = 𝑘 → ((𝜑 → (((bits‘𝐴) ∩ (0..^𝑥)) smul (bits‘𝐵)) = (bits‘((𝐴 mod (2↑𝑥)) · 𝐵))) ↔ (𝜑 → (((bits‘𝐴) ∩ (0..^𝑘)) smul (bits‘𝐵)) = (bits‘((𝐴 mod (2↑𝑘)) · 𝐵)))))
30		oveq2 7414	. . . . . . 7 ⊢ (𝑥 = (𝑘 + 1) → (0..^𝑥) = (0..^(𝑘 + 1)))
31	30	ineq2d 4212	. . . . . 6 ⊢ (𝑥 = (𝑘 + 1) → ((bits‘𝐴) ∩ (0..^𝑥)) = ((bits‘𝐴) ∩ (0..^(𝑘 + 1))))
32	31	oveq1d 7421	. . . . 5 ⊢ (𝑥 = (𝑘 + 1) → (((bits‘𝐴) ∩ (0..^𝑥)) smul (bits‘𝐵)) = (((bits‘𝐴) ∩ (0..^(𝑘 + 1))) smul (bits‘𝐵)))
33		oveq2 7414	. . . . . . 7 ⊢ (𝑥 = (𝑘 + 1) → (2↑𝑥) = (2↑(𝑘 + 1)))
34	33	oveq2d 7422	. . . . . 6 ⊢ (𝑥 = (𝑘 + 1) → (𝐴 mod (2↑𝑥)) = (𝐴 mod (2↑(𝑘 + 1))))
35	34	fvoveq1d 7428	. . . . 5 ⊢ (𝑥 = (𝑘 + 1) → (bits‘((𝐴 mod (2↑𝑥)) · 𝐵)) = (bits‘((𝐴 mod (2↑(𝑘 + 1))) · 𝐵)))
36	32, 35	eqeq12d 2749	. . . 4 ⊢ (𝑥 = (𝑘 + 1) → ((((bits‘𝐴) ∩ (0..^𝑥)) smul (bits‘𝐵)) = (bits‘((𝐴 mod (2↑𝑥)) · 𝐵)) ↔ (((bits‘𝐴) ∩ (0..^(𝑘 + 1))) smul (bits‘𝐵)) = (bits‘((𝐴 mod (2↑(𝑘 + 1))) · 𝐵))))
37	36	imbi2d 341	. . 3 ⊢ (𝑥 = (𝑘 + 1) → ((𝜑 → (((bits‘𝐴) ∩ (0..^𝑥)) smul (bits‘𝐵)) = (bits‘((𝐴 mod (2↑𝑥)) · 𝐵))) ↔ (𝜑 → (((bits‘𝐴) ∩ (0..^(𝑘 + 1))) smul (bits‘𝐵)) = (bits‘((𝐴 mod (2↑(𝑘 + 1))) · 𝐵)))))
38		oveq2 7414	. . . . . . 7 ⊢ (𝑥 = 𝑁 → (0..^𝑥) = (0..^𝑁))
39	38	ineq2d 4212	. . . . . 6 ⊢ (𝑥 = 𝑁 → ((bits‘𝐴) ∩ (0..^𝑥)) = ((bits‘𝐴) ∩ (0..^𝑁)))
40	39	oveq1d 7421	. . . . 5 ⊢ (𝑥 = 𝑁 → (((bits‘𝐴) ∩ (0..^𝑥)) smul (bits‘𝐵)) = (((bits‘𝐴) ∩ (0..^𝑁)) smul (bits‘𝐵)))
41		oveq2 7414	. . . . . . 7 ⊢ (𝑥 = 𝑁 → (2↑𝑥) = (2↑𝑁))
42	41	oveq2d 7422	. . . . . 6 ⊢ (𝑥 = 𝑁 → (𝐴 mod (2↑𝑥)) = (𝐴 mod (2↑𝑁)))
43	42	fvoveq1d 7428	. . . . 5 ⊢ (𝑥 = 𝑁 → (bits‘((𝐴 mod (2↑𝑥)) · 𝐵)) = (bits‘((𝐴 mod (2↑𝑁)) · 𝐵)))
44	40, 43	eqeq12d 2749	. . . 4 ⊢ (𝑥 = 𝑁 → ((((bits‘𝐴) ∩ (0..^𝑥)) smul (bits‘𝐵)) = (bits‘((𝐴 mod (2↑𝑥)) · 𝐵)) ↔ (((bits‘𝐴) ∩ (0..^𝑁)) smul (bits‘𝐵)) = (bits‘((𝐴 mod (2↑𝑁)) · 𝐵))))
45	44	imbi2d 341	. . 3 ⊢ (𝑥 = 𝑁 → ((𝜑 → (((bits‘𝐴) ∩ (0..^𝑥)) smul (bits‘𝐵)) = (bits‘((𝐴 mod (2↑𝑥)) · 𝐵))) ↔ (𝜑 → (((bits‘𝐴) ∩ (0..^𝑁)) smul (bits‘𝐵)) = (bits‘((𝐴 mod (2↑𝑁)) · 𝐵)))))
46		smumullem.a	. . . . . . . 8 ⊢ (𝜑 → 𝐴 ∈ ℤ)
47		zmod10 13849	. . . . . . . 8 ⊢ (𝐴 ∈ ℤ → (𝐴 mod 1) = 0)
48	46, 47	syl 17	. . . . . . 7 ⊢ (𝜑 → (𝐴 mod 1) = 0)
49	48	oveq1d 7421	. . . . . 6 ⊢ (𝜑 → ((𝐴 mod 1) · 𝐵) = (0 · 𝐵))
50		smumullem.b	. . . . . . . 8 ⊢ (𝜑 → 𝐵 ∈ ℤ)
51	50	zcnd 12664	. . . . . . 7 ⊢ (𝜑 → 𝐵 ∈ ℂ)
52	51	mul02d 11409	. . . . . 6 ⊢ (𝜑 → (0 · 𝐵) = 0)
53	49, 52	eqtrd 2773	. . . . 5 ⊢ (𝜑 → ((𝐴 mod 1) · 𝐵) = 0)
54	53	fveq2d 6893	. . . 4 ⊢ (𝜑 → (bits‘((𝐴 mod 1) · 𝐵)) = (bits‘0))
55		0bits 16377	. . . 4 ⊢ (bits‘0) = ∅
56	54, 55	eqtr2di 2790	. . 3 ⊢ (𝜑 → ∅ = (bits‘((𝐴 mod 1) · 𝐵)))
57		oveq1 7413	. . . . . 6 ⊢ ((((bits‘𝐴) ∩ (0..^𝑘)) smul (bits‘𝐵)) = (bits‘((𝐴 mod (2↑𝑘)) · 𝐵)) → ((((bits‘𝐴) ∩ (0..^𝑘)) smul (bits‘𝐵)) sadd {𝑛 ∈ ℕ₀ ∣ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵))}) = ((bits‘((𝐴 mod (2↑𝑘)) · 𝐵)) sadd {𝑛 ∈ ℕ₀ ∣ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵))}))
58		bitsss 16364	. . . . . . . . 9 ⊢ (bits‘𝐴) ⊆ ℕ₀
59	58	a1i 11	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → (bits‘𝐴) ⊆ ℕ₀)
60	9	a1i 11	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → (bits‘𝐵) ⊆ ℕ₀)
61		simpr 486	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → 𝑘 ∈ ℕ₀)
62	59, 60, 61	smup1 16427	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → (((bits‘𝐴) ∩ (0..^(𝑘 + 1))) smul (bits‘𝐵)) = ((((bits‘𝐴) ∩ (0..^𝑘)) smul (bits‘𝐵)) sadd {𝑛 ∈ ℕ₀ ∣ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵))}))
63		bitsinv1lem 16379	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℤ ∧ 𝑘 ∈ ℕ₀) → (𝐴 mod (2↑(𝑘 + 1))) = ((𝐴 mod (2↑𝑘)) + if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0)))
64	46, 63	sylan 581	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → (𝐴 mod (2↑(𝑘 + 1))) = ((𝐴 mod (2↑𝑘)) + if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0)))
65	64	oveq1d 7421	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → ((𝐴 mod (2↑(𝑘 + 1))) · 𝐵) = (((𝐴 mod (2↑𝑘)) + if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0)) · 𝐵))
66	46	adantr 482	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → 𝐴 ∈ ℤ)
67		2nn 12282	. . . . . . . . . . . . . . 15 ⊢ 2 ∈ ℕ
68	67	a1i 11	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → 2 ∈ ℕ)
69	68, 61	nnexpcld 14205	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → (2↑𝑘) ∈ ℕ)
70	66, 69	zmodcld 13854	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → (𝐴 mod (2↑𝑘)) ∈ ℕ₀)
71	70	nn0cnd 12531	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → (𝐴 mod (2↑𝑘)) ∈ ℂ)
72	69	nnnn0d 12529	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → (2↑𝑘) ∈ ℕ₀)
73		0nn0 12484	. . . . . . . . . . . . 13 ⊢ 0 ∈ ℕ₀
74		ifcl 4573	. . . . . . . . . . . . 13 ⊢ (((2↑𝑘) ∈ ℕ₀ ∧ 0 ∈ ℕ₀) → if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0) ∈ ℕ₀)
75	72, 73, 74	sylancl 587	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0) ∈ ℕ₀)
76	75	nn0cnd 12531	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0) ∈ ℂ)
77	51	adantr 482	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → 𝐵 ∈ ℂ)
78	71, 76, 77	adddird 11236	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → (((𝐴 mod (2↑𝑘)) + if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0)) · 𝐵) = (((𝐴 mod (2↑𝑘)) · 𝐵) + (if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0) · 𝐵)))
79	76, 77	mulcomd 11232	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → (if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0) · 𝐵) = (𝐵 · if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0)))
80	79	oveq2d 7422	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → (((𝐴 mod (2↑𝑘)) · 𝐵) + (if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0) · 𝐵)) = (((𝐴 mod (2↑𝑘)) · 𝐵) + (𝐵 · if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0))))
81	65, 78, 80	3eqtrd 2777	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → ((𝐴 mod (2↑(𝑘 + 1))) · 𝐵) = (((𝐴 mod (2↑𝑘)) · 𝐵) + (𝐵 · if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0))))
82	81	fveq2d 6893	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → (bits‘((𝐴 mod (2↑(𝑘 + 1))) · 𝐵)) = (bits‘(((𝐴 mod (2↑𝑘)) · 𝐵) + (𝐵 · if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0)))))
83	70	nn0zd 12581	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → (𝐴 mod (2↑𝑘)) ∈ ℤ)
84	50	adantr 482	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → 𝐵 ∈ ℤ)
85	83, 84	zmulcld 12669	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → ((𝐴 mod (2↑𝑘)) · 𝐵) ∈ ℤ)
86	75	nn0zd 12581	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0) ∈ ℤ)
87	84, 86	zmulcld 12669	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → (𝐵 · if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0)) ∈ ℤ)
88		sadadd 16405	. . . . . . . . 9 ⊢ ((((𝐴 mod (2↑𝑘)) · 𝐵) ∈ ℤ ∧ (𝐵 · if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0)) ∈ ℤ) → ((bits‘((𝐴 mod (2↑𝑘)) · 𝐵)) sadd (bits‘(𝐵 · if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0)))) = (bits‘(((𝐴 mod (2↑𝑘)) · 𝐵) + (𝐵 · if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0)))))
89	85, 87, 88	syl2anc 585	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → ((bits‘((𝐴 mod (2↑𝑘)) · 𝐵)) sadd (bits‘(𝐵 · if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0)))) = (bits‘(((𝐴 mod (2↑𝑘)) · 𝐵) + (𝐵 · if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0)))))
90		oveq2 7414	. . . . . . . . . . 11 ⊢ ((2↑𝑘) = if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0) → (𝐵 · (2↑𝑘)) = (𝐵 · if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0)))
91	90	fveqeq2d 6897	. . . . . . . . . 10 ⊢ ((2↑𝑘) = if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0) → ((bits‘(𝐵 · (2↑𝑘))) = {𝑛 ∈ ℕ₀ ∣ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵))} ↔ (bits‘(𝐵 · if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0))) = {𝑛 ∈ ℕ₀ ∣ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵))}))
92		oveq2 7414	. . . . . . . . . . 11 ⊢ (0 = if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0) → (𝐵 · 0) = (𝐵 · if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0)))
93	92	fveqeq2d 6897	. . . . . . . . . 10 ⊢ (0 = if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0) → ((bits‘(𝐵 · 0)) = {𝑛 ∈ ℕ₀ ∣ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵))} ↔ (bits‘(𝐵 · if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0))) = {𝑛 ∈ ℕ₀ ∣ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵))}))
94		bitsshft 16413	. . . . . . . . . . . 12 ⊢ ((𝐵 ∈ ℤ ∧ 𝑘 ∈ ℕ₀) → {𝑛 ∈ ℕ₀ ∣ (𝑛 − 𝑘) ∈ (bits‘𝐵)} = (bits‘(𝐵 · (2↑𝑘))))
95	50, 94	sylan 581	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → {𝑛 ∈ ℕ₀ ∣ (𝑛 − 𝑘) ∈ (bits‘𝐵)} = (bits‘(𝐵 · (2↑𝑘))))
96		ibar 530	. . . . . . . . . . . 12 ⊢ (𝑘 ∈ (bits‘𝐴) → ((𝑛 − 𝑘) ∈ (bits‘𝐵) ↔ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵))))
97	96	rabbidv 3441	. . . . . . . . . . 11 ⊢ (𝑘 ∈ (bits‘𝐴) → {𝑛 ∈ ℕ₀ ∣ (𝑛 − 𝑘) ∈ (bits‘𝐵)} = {𝑛 ∈ ℕ₀ ∣ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵))})
98	95, 97	sylan9req 2794	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑘 ∈ ℕ₀) ∧ 𝑘 ∈ (bits‘𝐴)) → (bits‘(𝐵 · (2↑𝑘))) = {𝑛 ∈ ℕ₀ ∣ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵))})
99	77	adantr 482	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑘 ∈ ℕ₀) ∧ ¬ 𝑘 ∈ (bits‘𝐴)) → 𝐵 ∈ ℂ)
100	99	mul01d 11410	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑘 ∈ ℕ₀) ∧ ¬ 𝑘 ∈ (bits‘𝐴)) → (𝐵 · 0) = 0)
101	100	fveq2d 6893	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑘 ∈ ℕ₀) ∧ ¬ 𝑘 ∈ (bits‘𝐴)) → (bits‘(𝐵 · 0)) = (bits‘0))
102		simpr 486	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝑘 ∈ ℕ₀) ∧ ¬ 𝑘 ∈ (bits‘𝐴)) → ¬ 𝑘 ∈ (bits‘𝐴))
103	102	intnanrd 491	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑘 ∈ ℕ₀) ∧ ¬ 𝑘 ∈ (bits‘𝐴)) → ¬ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵)))
104	103	ralrimivw 3151	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑘 ∈ ℕ₀) ∧ ¬ 𝑘 ∈ (bits‘𝐴)) → ∀𝑛 ∈ ℕ₀ ¬ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵)))
105		rabeq0 4384	. . . . . . . . . . . 12 ⊢ ({𝑛 ∈ ℕ₀ ∣ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵))} = ∅ ↔ ∀𝑛 ∈ ℕ₀ ¬ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵)))
106	104, 105	sylibr 233	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑘 ∈ ℕ₀) ∧ ¬ 𝑘 ∈ (bits‘𝐴)) → {𝑛 ∈ ℕ₀ ∣ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵))} = ∅)
107	55, 101, 106	3eqtr4a 2799	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑘 ∈ ℕ₀) ∧ ¬ 𝑘 ∈ (bits‘𝐴)) → (bits‘(𝐵 · 0)) = {𝑛 ∈ ℕ₀ ∣ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵))})
108	91, 93, 98, 107	ifbothda 4566	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → (bits‘(𝐵 · if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0))) = {𝑛 ∈ ℕ₀ ∣ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵))})
109	108	oveq2d 7422	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → ((bits‘((𝐴 mod (2↑𝑘)) · 𝐵)) sadd (bits‘(𝐵 · if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0)))) = ((bits‘((𝐴 mod (2↑𝑘)) · 𝐵)) sadd {𝑛 ∈ ℕ₀ ∣ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵))}))
110	82, 89, 109	3eqtr2d 2779	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → (bits‘((𝐴 mod (2↑(𝑘 + 1))) · 𝐵)) = ((bits‘((𝐴 mod (2↑𝑘)) · 𝐵)) sadd {𝑛 ∈ ℕ₀ ∣ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵))}))
111	62, 110	eqeq12d 2749	. . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → ((((bits‘𝐴) ∩ (0..^(𝑘 + 1))) smul (bits‘𝐵)) = (bits‘((𝐴 mod (2↑(𝑘 + 1))) · 𝐵)) ↔ ((((bits‘𝐴) ∩ (0..^𝑘)) smul (bits‘𝐵)) sadd {𝑛 ∈ ℕ₀ ∣ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵))}) = ((bits‘((𝐴 mod (2↑𝑘)) · 𝐵)) sadd {𝑛 ∈ ℕ₀ ∣ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵))})))
112	57, 111	imbitrrid 245	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ₀) → ((((bits‘𝐴) ∩ (0..^𝑘)) smul (bits‘𝐵)) = (bits‘((𝐴 mod (2↑𝑘)) · 𝐵)) → (((bits‘𝐴) ∩ (0..^(𝑘 + 1))) smul (bits‘𝐵)) = (bits‘((𝐴 mod (2↑(𝑘 + 1))) · 𝐵))))
113	112	expcom 415	. . . 4 ⊢ (𝑘 ∈ ℕ₀ → (𝜑 → ((((bits‘𝐴) ∩ (0..^𝑘)) smul (bits‘𝐵)) = (bits‘((𝐴 mod (2↑𝑘)) · 𝐵)) → (((bits‘𝐴) ∩ (0..^(𝑘 + 1))) smul (bits‘𝐵)) = (bits‘((𝐴 mod (2↑(𝑘 + 1))) · 𝐵)))))
114	113	a2d 29	. . 3 ⊢ (𝑘 ∈ ℕ₀ → ((𝜑 → (((bits‘𝐴) ∩ (0..^𝑘)) smul (bits‘𝐵)) = (bits‘((𝐴 mod (2↑𝑘)) · 𝐵))) → (𝜑 → (((bits‘𝐴) ∩ (0..^(𝑘 + 1))) smul (bits‘𝐵)) = (bits‘((𝐴 mod (2↑(𝑘 + 1))) · 𝐵)))))
115	21, 29, 37, 45, 56, 114	nn0ind 12654	. 2 ⊢ (𝑁 ∈ ℕ₀ → (𝜑 → (((bits‘𝐴) ∩ (0..^𝑁)) smul (bits‘𝐵)) = (bits‘((𝐴 mod (2↑𝑁)) · 𝐵))))
116	1, 115	mpcom 38	1 ⊢ (𝜑 → (((bits‘𝐴) ∩ (0..^𝑁)) smul (bits‘𝐵)) = (bits‘((𝐴 mod (2↑𝑁)) · 𝐵)))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ∧ wa 397 = wceq 1542 ∈ wcel 2107 ∀wral 3062 {crab 3433 ∩ cin 3947 ⊆ wss 3948 ∅c0 4322 ifcif 4528 ‘cfv 6541 (class class class)co 7406 ℂcc 11105 0cc0 11107 1c1 11108 + caddc 11110 · cmul 11112 − cmin 11441 ℕcn 12209 2c2 12264 ℕ₀cn0 12469 ℤcz 12555 ..^cfzo 13624 mod cmo 13831 ↑cexp 14024 bitscbits 16357 sadd csad 16358 smul csmu 16359

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 5285 ax-sep 5299 ax-nul 5306 ax-pow 5363 ax-pr 5427 ax-un 7722 ax-inf2 9633 ax-cnex 11163 ax-resscn 11164 ax-1cn 11165 ax-icn 11166 ax-addcl 11167 ax-addrcl 11168 ax-mulcl 11169 ax-mulrcl 11170 ax-mulcom 11171 ax-addass 11172 ax-mulass 11173 ax-distr 11174 ax-i2m1 11175 ax-1ne0 11176 ax-1rid 11177 ax-rnegex 11178 ax-rrecex 11179 ax-cnre 11180 ax-pre-lttri 11181 ax-pre-lttrn 11182 ax-pre-ltadd 11183 ax-pre-mulgt0 11184 ax-pre-sup 11185

This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-xor 1511 df-tru 1545 df-fal 1555 df-had 1596 df-cad 1609 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-rmo 3377 df-reu 3378 df-rab 3434 df-v 3477 df-sbc 3778 df-csb 3894 df-dif 3951 df-un 3953 df-in 3955 df-ss 3965 df-pss 3967 df-nul 4323 df-if 4529 df-pw 4604 df-sn 4629 df-pr 4631 df-op 4635 df-uni 4909 df-int 4951 df-iun 4999 df-disj 5114 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5574 df-eprel 5580 df-po 5588 df-so 5589 df-fr 5631 df-se 5632 df-we 5633 df-xp 5682 df-rel 5683 df-cnv 5684 df-co 5685 df-dm 5686 df-rn 5687 df-res 5688 df-ima 5689 df-pred 6298 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6493 df-fun 6543 df-fn 6544 df-f 6545 df-f1 6546 df-fo 6547 df-f1o 6548 df-fv 6549 df-isom 6550 df-riota 7362 df-ov 7409 df-oprab 7410 df-mpo 7411 df-om 7853 df-1st 7972 df-2nd 7973 df-frecs 8263 df-wrecs 8294 df-recs 8368 df-rdg 8407 df-1o 8463 df-2o 8464 df-oadd 8467 df-er 8700 df-map 8819 df-pm 8820 df-en 8937 df-dom 8938 df-sdom 8939 df-fin 8940 df-sup 9434 df-inf 9435 df-oi 9502 df-dju 9893 df-card 9931 df-pnf 11247 df-mnf 11248 df-xr 11249 df-ltxr 11250 df-le 11251 df-sub 11443 df-neg 11444 df-div 11869 df-nn 12210 df-2 12272 df-3 12273 df-n0 12470 df-xnn0 12542 df-z 12556 df-uz 12820 df-rp 12972 df-fz 13482 df-fzo 13625 df-fl 13754 df-mod 13832 df-seq 13964 df-exp 14025 df-hash 14288 df-cj 15043 df-re 15044 df-im 15045 df-sqrt 15179 df-abs 15180 df-clim 15429 df-sum 15630 df-dvds 16195 df-bits 16360 df-sad 16389 df-smu 16414

This theorem is referenced by: smumul 16431

W3C validator