Theorem smumullem 15214

Description: Lemma for smumul 15215. (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 6658	. . . . . . . . . 10 ⊢ (𝑥 = 0 → (0..^𝑥) = (0..^0))
3		fzo0 12492	. . . . . . . . . 10 ⊢ (0..^0) = ∅
4	2, 3	syl6eq 2672	. . . . . . . . 9 ⊢ (𝑥 = 0 → (0..^𝑥) = ∅)
5	4	ineq2d 3814	. . . . . . . 8 ⊢ (𝑥 = 0 → ((bits‘𝐴) ∩ (0..^𝑥)) = ((bits‘𝐴) ∩ ∅))
6		in0 3968	. . . . . . . 8 ⊢ ((bits‘𝐴) ∩ ∅) = ∅
7	5, 6	syl6eq 2672	. . . . . . 7 ⊢ (𝑥 = 0 → ((bits‘𝐴) ∩ (0..^𝑥)) = ∅)
8	7	oveq1d 6665	. . . . . 6 ⊢ (𝑥 = 0 → (((bits‘𝐴) ∩ (0..^𝑥)) smul (bits‘𝐵)) = (∅ smul (bits‘𝐵)))
9		bitsss 15148	. . . . . . 7 ⊢ (bits‘𝐵) ⊆ ℕ0
10		smu02 15209	. . . . . . 7 ⊢ ((bits‘𝐵) ⊆ ℕ0 → (∅ smul (bits‘𝐵)) = ∅)
11	9, 10	ax-mp 5	. . . . . 6 ⊢ (∅ smul (bits‘𝐵)) = ∅
12	8, 11	syl6eq 2672	. . . . 5 ⊢ (𝑥 = 0 → (((bits‘𝐴) ∩ (0..^𝑥)) smul (bits‘𝐵)) = ∅)
13		oveq2 6658	. . . . . . . . 9 ⊢ (𝑥 = 0 → (2↑𝑥) = (2↑0))
14		2cn 11091	. . . . . . . . . 10 ⊢ 2 ∈ ℂ
15		exp0 12864	. . . . . . . . . 10 ⊢ (2 ∈ ℂ → (2↑0) = 1)
16	14, 15	ax-mp 5	. . . . . . . . 9 ⊢ (2↑0) = 1
17	13, 16	syl6eq 2672	. . . . . . . 8 ⊢ (𝑥 = 0 → (2↑𝑥) = 1)
18	17	oveq2d 6666	. . . . . . 7 ⊢ (𝑥 = 0 → (𝐴 mod (2↑𝑥)) = (𝐴 mod 1))
19	18	oveq1d 6665	. . . . . 6 ⊢ (𝑥 = 0 → ((𝐴 mod (2↑𝑥)) · 𝐵) = ((𝐴 mod 1) · 𝐵))
20	19	fveq2d 6195	. . . . 5 ⊢ (𝑥 = 0 → (bits‘((𝐴 mod (2↑𝑥)) · 𝐵)) = (bits‘((𝐴 mod 1) · 𝐵)))
21	12, 20	eqeq12d 2637	. . . 4 ⊢ (𝑥 = 0 → ((((bits‘𝐴) ∩ (0..^𝑥)) smul (bits‘𝐵)) = (bits‘((𝐴 mod (2↑𝑥)) · 𝐵)) ↔ ∅ = (bits‘((𝐴 mod 1) · 𝐵))))
22	21	imbi2d 330	. . 3 ⊢ (𝑥 = 0 → ((𝜑 → (((bits‘𝐴) ∩ (0..^𝑥)) smul (bits‘𝐵)) = (bits‘((𝐴 mod (2↑𝑥)) · 𝐵))) ↔ (𝜑 → ∅ = (bits‘((𝐴 mod 1) · 𝐵)))))
23		oveq2 6658	. . . . . . 7 ⊢ (𝑥 = 𝑘 → (0..^𝑥) = (0..^𝑘))
24	23	ineq2d 3814	. . . . . 6 ⊢ (𝑥 = 𝑘 → ((bits‘𝐴) ∩ (0..^𝑥)) = ((bits‘𝐴) ∩ (0..^𝑘)))
25	24	oveq1d 6665	. . . . 5 ⊢ (𝑥 = 𝑘 → (((bits‘𝐴) ∩ (0..^𝑥)) smul (bits‘𝐵)) = (((bits‘𝐴) ∩ (0..^𝑘)) smul (bits‘𝐵)))
26		oveq2 6658	. . . . . . . 8 ⊢ (𝑥 = 𝑘 → (2↑𝑥) = (2↑𝑘))
27	26	oveq2d 6666	. . . . . . 7 ⊢ (𝑥 = 𝑘 → (𝐴 mod (2↑𝑥)) = (𝐴 mod (2↑𝑘)))
28	27	oveq1d 6665	. . . . . 6 ⊢ (𝑥 = 𝑘 → ((𝐴 mod (2↑𝑥)) · 𝐵) = ((𝐴 mod (2↑𝑘)) · 𝐵))
29	28	fveq2d 6195	. . . . 5 ⊢ (𝑥 = 𝑘 → (bits‘((𝐴 mod (2↑𝑥)) · 𝐵)) = (bits‘((𝐴 mod (2↑𝑘)) · 𝐵)))
30	25, 29	eqeq12d 2637	. . . 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))))
31	30	imbi2d 330	. . 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)))))
32		oveq2 6658	. . . . . . 7 ⊢ (𝑥 = (𝑘 + 1) → (0..^𝑥) = (0..^(𝑘 + 1)))
33	32	ineq2d 3814	. . . . . 6 ⊢ (𝑥 = (𝑘 + 1) → ((bits‘𝐴) ∩ (0..^𝑥)) = ((bits‘𝐴) ∩ (0..^(𝑘 + 1))))
34	33	oveq1d 6665	. . . . 5 ⊢ (𝑥 = (𝑘 + 1) → (((bits‘𝐴) ∩ (0..^𝑥)) smul (bits‘𝐵)) = (((bits‘𝐴) ∩ (0..^(𝑘 + 1))) smul (bits‘𝐵)))
35		oveq2 6658	. . . . . . . 8 ⊢ (𝑥 = (𝑘 + 1) → (2↑𝑥) = (2↑(𝑘 + 1)))
36	35	oveq2d 6666	. . . . . . 7 ⊢ (𝑥 = (𝑘 + 1) → (𝐴 mod (2↑𝑥)) = (𝐴 mod (2↑(𝑘 + 1))))
37	36	oveq1d 6665	. . . . . 6 ⊢ (𝑥 = (𝑘 + 1) → ((𝐴 mod (2↑𝑥)) · 𝐵) = ((𝐴 mod (2↑(𝑘 + 1))) · 𝐵))
38	37	fveq2d 6195	. . . . 5 ⊢ (𝑥 = (𝑘 + 1) → (bits‘((𝐴 mod (2↑𝑥)) · 𝐵)) = (bits‘((𝐴 mod (2↑(𝑘 + 1))) · 𝐵)))
39	34, 38	eqeq12d 2637	. . . 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))))
40	39	imbi2d 330	. . 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)))))
41		oveq2 6658	. . . . . . 7 ⊢ (𝑥 = 𝑁 → (0..^𝑥) = (0..^𝑁))
42	41	ineq2d 3814	. . . . . 6 ⊢ (𝑥 = 𝑁 → ((bits‘𝐴) ∩ (0..^𝑥)) = ((bits‘𝐴) ∩ (0..^𝑁)))
43	42	oveq1d 6665	. . . . 5 ⊢ (𝑥 = 𝑁 → (((bits‘𝐴) ∩ (0..^𝑥)) smul (bits‘𝐵)) = (((bits‘𝐴) ∩ (0..^𝑁)) smul (bits‘𝐵)))
44		oveq2 6658	. . . . . . . 8 ⊢ (𝑥 = 𝑁 → (2↑𝑥) = (2↑𝑁))
45	44	oveq2d 6666	. . . . . . 7 ⊢ (𝑥 = 𝑁 → (𝐴 mod (2↑𝑥)) = (𝐴 mod (2↑𝑁)))
46	45	oveq1d 6665	. . . . . 6 ⊢ (𝑥 = 𝑁 → ((𝐴 mod (2↑𝑥)) · 𝐵) = ((𝐴 mod (2↑𝑁)) · 𝐵))
47	46	fveq2d 6195	. . . . 5 ⊢ (𝑥 = 𝑁 → (bits‘((𝐴 mod (2↑𝑥)) · 𝐵)) = (bits‘((𝐴 mod (2↑𝑁)) · 𝐵)))
48	43, 47	eqeq12d 2637	. . . 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))))
49	48	imbi2d 330	. . 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)))))
50		smumullem.a	. . . . . . . 8 ⊢ (𝜑 → 𝐴 ∈ ℤ)
51		zmod10 12686	. . . . . . . 8 ⊢ (𝐴 ∈ ℤ → (𝐴 mod 1) = 0)
52	50, 51	syl 17	. . . . . . 7 ⊢ (𝜑 → (𝐴 mod 1) = 0)
53	52	oveq1d 6665	. . . . . 6 ⊢ (𝜑 → ((𝐴 mod 1) · 𝐵) = (0 · 𝐵))
54		smumullem.b	. . . . . . . 8 ⊢ (𝜑 → 𝐵 ∈ ℤ)
55	54	zcnd 11483	. . . . . . 7 ⊢ (𝜑 → 𝐵 ∈ ℂ)
56	55	mul02d 10234	. . . . . 6 ⊢ (𝜑 → (0 · 𝐵) = 0)
57	53, 56	eqtrd 2656	. . . . 5 ⊢ (𝜑 → ((𝐴 mod 1) · 𝐵) = 0)
58	57	fveq2d 6195	. . . 4 ⊢ (𝜑 → (bits‘((𝐴 mod 1) · 𝐵)) = (bits‘0))
59		0bits 15161	. . . 4 ⊢ (bits‘0) = ∅
60	58, 59	syl6req 2673	. . 3 ⊢ (𝜑 → ∅ = (bits‘((𝐴 mod 1) · 𝐵)))
61		oveq1 6657	. . . . . 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))}))
62		bitsss 15148	. . . . . . . . 9 ⊢ (bits‘𝐴) ⊆ ℕ0
63	62	a1i 11	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (bits‘𝐴) ⊆ ℕ0)
64	9	a1i 11	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (bits‘𝐵) ⊆ ℕ0)
65		simpr 477	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → 𝑘 ∈ ℕ0)
66	63, 64, 65	smup1 15211	. . . . . . 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))}))
67		bitsinv1lem 15163	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℤ ∧ 𝑘 ∈ ℕ0) → (𝐴 mod (2↑(𝑘 + 1))) = ((𝐴 mod (2↑𝑘)) + if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0)))
68	50, 67	sylan 488	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (𝐴 mod (2↑(𝑘 + 1))) = ((𝐴 mod (2↑𝑘)) + if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0)))
69	68	oveq1d 6665	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → ((𝐴 mod (2↑(𝑘 + 1))) · 𝐵) = (((𝐴 mod (2↑𝑘)) + if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0)) · 𝐵))
70	50	adantr 481	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → 𝐴 ∈ ℤ)
71		2nn 11185	. . . . . . . . . . . . . . 15 ⊢ 2 ∈ ℕ
72	71	a1i 11	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → 2 ∈ ℕ)
73	72, 65	nnexpcld 13030	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (2↑𝑘) ∈ ℕ)
74	70, 73	zmodcld 12691	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (𝐴 mod (2↑𝑘)) ∈ ℕ0)
75	74	nn0cnd 11353	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (𝐴 mod (2↑𝑘)) ∈ ℂ)
76	73	nnnn0d 11351	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (2↑𝑘) ∈ ℕ0)
77		0nn0 11307	. . . . . . . . . . . . 13 ⊢ 0 ∈ ℕ0
78		ifcl 4130	. . . . . . . . . . . . 13 ⊢ (((2↑𝑘) ∈ ℕ0 ∧ 0 ∈ ℕ0) → if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0) ∈ ℕ0)
79	76, 77, 78	sylancl 694	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0) ∈ ℕ0)
80	79	nn0cnd 11353	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0) ∈ ℂ)
81	55	adantr 481	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → 𝐵 ∈ ℂ)
82	75, 80, 81	adddird 10065	. . . . . . . . . 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)))
83	80, 81	mulcomd 10061	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0) · 𝐵) = (𝐵 · if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0)))
84	83	oveq2d 6666	. . . . . . . . . 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))))
85	69, 82, 84	3eqtrd 2660	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → ((𝐴 mod (2↑(𝑘 + 1))) · 𝐵) = (((𝐴 mod (2↑𝑘)) · 𝐵) + (𝐵 · if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0))))
86	85	fveq2d 6195	. . . . . . . 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)))))
87	74	nn0zd 11480	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (𝐴 mod (2↑𝑘)) ∈ ℤ)
88	54	adantr 481	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → 𝐵 ∈ ℤ)
89	87, 88	zmulcld 11488	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → ((𝐴 mod (2↑𝑘)) · 𝐵) ∈ ℤ)
90	79	nn0zd 11480	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0) ∈ ℤ)
91	88, 90	zmulcld 11488	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (𝐵 · if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0)) ∈ ℤ)
92		sadadd 15189	. . . . . . . . 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)))))
93	89, 91, 92	syl2anc 693	. . . . . . . 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)))))
94		oveq2 6658	. . . . . . . . . . . 12 ⊢ ((2↑𝑘) = if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0) → (𝐵 · (2↑𝑘)) = (𝐵 · if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0)))
95	94	fveq2d 6195	. . . . . . . . . . 11 ⊢ ((2↑𝑘) = if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0) → (bits‘(𝐵 · (2↑𝑘))) = (bits‘(𝐵 · if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0))))
96	95	eqeq1d 2624	. . . . . . . . . 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))}))
97		oveq2 6658	. . . . . . . . . . . 12 ⊢ (0 = if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0) → (𝐵 · 0) = (𝐵 · if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0)))
98	97	fveq2d 6195	. . . . . . . . . . 11 ⊢ (0 = if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0) → (bits‘(𝐵 · 0)) = (bits‘(𝐵 · if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0))))
99	98	eqeq1d 2624	. . . . . . . . . 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))}))
100		bitsshft 15197	. . . . . . . . . . . 12 ⊢ ((𝐵 ∈ ℤ ∧ 𝑘 ∈ ℕ0) → {𝑛 ∈ ℕ0 ∣ (𝑛 − 𝑘) ∈ (bits‘𝐵)} = (bits‘(𝐵 · (2↑𝑘))))
101	54, 100	sylan 488	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → {𝑛 ∈ ℕ0 ∣ (𝑛 − 𝑘) ∈ (bits‘𝐵)} = (bits‘(𝐵 · (2↑𝑘))))
102		ibar 525	. . . . . . . . . . . 12 ⊢ (𝑘 ∈ (bits‘𝐴) → ((𝑛 − 𝑘) ∈ (bits‘𝐵) ↔ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵))))
103	102	rabbidv 3189	. . . . . . . . . . 11 ⊢ (𝑘 ∈ (bits‘𝐴) → {𝑛 ∈ ℕ0 ∣ (𝑛 − 𝑘) ∈ (bits‘𝐵)} = {𝑛 ∈ ℕ0 ∣ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵))})
104	101, 103	sylan9req 2677	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑘 ∈ ℕ0) ∧ 𝑘 ∈ (bits‘𝐴)) → (bits‘(𝐵 · (2↑𝑘))) = {𝑛 ∈ ℕ0 ∣ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵))})
105	81	adantr 481	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑘 ∈ ℕ0) ∧ ¬ 𝑘 ∈ (bits‘𝐴)) → 𝐵 ∈ ℂ)
106	105	mul01d 10235	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑘 ∈ ℕ0) ∧ ¬ 𝑘 ∈ (bits‘𝐴)) → (𝐵 · 0) = 0)
107	106	fveq2d 6195	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑘 ∈ ℕ0) ∧ ¬ 𝑘 ∈ (bits‘𝐴)) → (bits‘(𝐵 · 0)) = (bits‘0))
108		simpr 477	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝑘 ∈ ℕ0) ∧ ¬ 𝑘 ∈ (bits‘𝐴)) → ¬ 𝑘 ∈ (bits‘𝐴))
109	108	intnanrd 963	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑘 ∈ ℕ0) ∧ ¬ 𝑘 ∈ (bits‘𝐴)) → ¬ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵)))
110	109	ralrimivw 2967	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑘 ∈ ℕ0) ∧ ¬ 𝑘 ∈ (bits‘𝐴)) → ∀𝑛 ∈ ℕ0 ¬ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵)))
111		rabeq0 3957	. . . . . . . . . . . 12 ⊢ ({𝑛 ∈ ℕ0 ∣ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵))} = ∅ ↔ ∀𝑛 ∈ ℕ0 ¬ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵)))
112	110, 111	sylibr 224	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑘 ∈ ℕ0) ∧ ¬ 𝑘 ∈ (bits‘𝐴)) → {𝑛 ∈ ℕ0 ∣ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵))} = ∅)
113	59, 107, 112	3eqtr4a 2682	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑘 ∈ ℕ0) ∧ ¬ 𝑘 ∈ (bits‘𝐴)) → (bits‘(𝐵 · 0)) = {𝑛 ∈ ℕ0 ∣ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵))})
114	96, 99, 104, 113	ifbothda 4123	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ ℕ0) → (bits‘(𝐵 · if(𝑘 ∈ (bits‘𝐴), (2↑𝑘), 0))) = {𝑛 ∈ ℕ0 ∣ (𝑘 ∈ (bits‘𝐴) ∧ (𝑛 − 𝑘) ∈ (bits‘𝐵))})
115	114	oveq2d 6666	. . . . . . . 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))}))
116	86, 93, 115	3eqtr2d 2662	. . . . . . 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))}))
117	66, 116	eqeq12d 2637	. . . . . 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))})))
118	61, 117	syl5ibr 236	. . . . 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))))
119	118	expcom 451	. . . 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)))))
120	119	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)))))
121	22, 31, 40, 49, 60, 120	nn0ind 11472	. 2 ⊢ (𝑁 ∈ ℕ0 → (𝜑 → (((bits‘𝐴) ∩ (0..^𝑁)) smul (bits‘𝐵)) = (bits‘((𝐴 mod (2↑𝑁)) · 𝐵))))
122	1, 121	mpcom 38	1 ⊢ (𝜑 → (((bits‘𝐴) ∩ (0..^𝑁)) smul (bits‘𝐵)) = (bits‘((𝐴 mod (2↑𝑁)) · 𝐵)))

Syntax hints:  ¬ wn 3   → wi 4   ∧ wa 384   = wceq 1483   ∈ wcel 1990  ∀wral 2912  {crab 2916   ∩ cin 3573   ⊆ wss 3574  ∅c0 3915  ifcif 4086  ‘cfv 5888  (class class class)co 6650  ℂcc 9934  0cc0 9936  1c1 9937   + caddc 9939   · cmul 9941   − cmin 10266  ℕcn 11020  2c2 11070  ℕ₀cn0 11292  ℤcz 11377  ..^cfzo 12465   mod cmo 12668  ↑cexp 12860  bitscbits 15141   sadd csad 15142   smul csmu 15143

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-rep 4771  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949  ax-inf2 8538  ax-cnex 9992  ax-resscn 9993  ax-1cn 9994  ax-icn 9995  ax-addcl 9996  ax-addrcl 9997  ax-mulcl 9998  ax-mulrcl 9999  ax-mulcom 10000  ax-addass 10001  ax-mulass 10002  ax-distr 10003  ax-i2m1 10004  ax-1ne0 10005  ax-1rid 10006  ax-rnegex 10007  ax-rrecex 10008  ax-cnre 10009  ax-pre-lttri 10010  ax-pre-lttrn 10011  ax-pre-ltadd 10012  ax-pre-mulgt0 10013  ax-pre-sup 10014

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1038  df-3an 1039  df-xor 1465  df-tru 1486  df-fal 1489  df-had 1533  df-cad 1546  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-nel 2898  df-ral 2917  df-rex 2918  df-reu 2919  df-rmo 2920  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-pss 3590  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-tp 4182  df-op 4184  df-uni 4437  df-int 4476  df-iun 4522  df-disj 4621  df-br 4654  df-opab 4713  df-mpt 4730  df-tr 4753  df-id 5024  df-eprel 5029  df-po 5035  df-so 5036  df-fr 5073  df-se 5074  df-we 5075  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-pred 5680  df-ord 5726  df-on 5727  df-lim 5728  df-suc 5729  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-isom 5897  df-riota 6611  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-om 7066  df-1st 7168  df-2nd 7169  df-wrecs 7407  df-recs 7468  df-rdg 7506  df-1o 7560  df-2o 7561  df-oadd 7564  df-er 7742  df-map 7859  df-pm 7860  df-en 7956  df-dom 7957  df-sdom 7958  df-fin 7959  df-sup 8348  df-inf 8349  df-oi 8415  df-card 8765  df-cda 8990  df-pnf 10076  df-mnf 10077  df-xr 10078  df-ltxr 10079  df-le 10080  df-sub 10268  df-neg 10269  df-div 10685  df-nn 11021  df-2 11079  df-3 11080  df-n0 11293  df-xnn0 11364  df-z 11378  df-uz 11688  df-rp 11833  df-fz 12327  df-fzo 12466  df-fl 12593  df-mod 12669  df-seq 12802  df-exp 12861  df-hash 13118  df-cj 13839  df-re 13840  df-im 13841  df-sqrt 13975  df-abs 13976  df-clim 14219  df-sum 14417  df-dvds 14984  df-bits 15144  df-sad 15173  df-smu 15198

This theorem is referenced by:  smumul  15215