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Theorem ipdirilem 30861

Description: Lemma for ipdiri 30862. (Contributed by NM, 26-Apr-2007.) (New usage is discouraged.)

**Hypotheses**
Ref	Expression
ip1i.1	⊢ 𝑋 = (BaseSet‘𝑈)
ip1i.2	⊢ 𝐺 = ( +_𝑣 ‘𝑈)
ip1i.4	⊢ 𝑆 = ( ·_𝑠OLD ‘𝑈)
ip1i.7	⊢ 𝑃 = (·_𝑖OLD‘𝑈)
ip1i.9	⊢ 𝑈 ∈ CPreHil_OLD
ipdiri.8	⊢ 𝐴 ∈ 𝑋
ipdiri.9	⊢ 𝐵 ∈ 𝑋
ipdiri.10	⊢ 𝐶 ∈ 𝑋

**Assertion**
Ref	Expression
ipdirilem	⊢ ((𝐴𝐺𝐵)𝑃𝐶) = ((𝐴𝑃𝐶) + (𝐵𝑃𝐶))

**Proof of Theorem ipdirilem**
Step	Hyp	Ref	Expression
1		2cn 12368	. . . . . . 7 ⊢ 2 ∈ ℂ
2		2ne0 12397	. . . . . . 7 ⊢ 2 ≠ 0
3	1, 2	recidi 12025	. . . . . 6 ⊢ (2 · (1 / 2)) = 1
4	3	oveq1i 7458	. . . . 5 ⊢ ((2 · (1 / 2))𝑆(𝐴𝐺𝐵)) = (1𝑆(𝐴𝐺𝐵))
5		ip1i.9	. . . . . . 7 ⊢ 𝑈 ∈ CPreHil_OLD
6	5	phnvi 30848	. . . . . 6 ⊢ 𝑈 ∈ NrmCVec
7		halfcn 12508	. . . . . . 7 ⊢ (1 / 2) ∈ ℂ
8		ipdiri.8	. . . . . . . 8 ⊢ 𝐴 ∈ 𝑋
9		ipdiri.9	. . . . . . . 8 ⊢ 𝐵 ∈ 𝑋
10		ip1i.1	. . . . . . . . 9 ⊢ 𝑋 = (BaseSet‘𝑈)
11		ip1i.2	. . . . . . . . 9 ⊢ 𝐺 = ( +_𝑣 ‘𝑈)
12	10, 11	nvgcl 30652	. . . . . . . 8 ⊢ ((𝑈 ∈ NrmCVec ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝐴𝐺𝐵) ∈ 𝑋)
13	6, 8, 9, 12	mp3an 1461	. . . . . . 7 ⊢ (𝐴𝐺𝐵) ∈ 𝑋
14	1, 7, 13	3pm3.2i 1339	. . . . . 6 ⊢ (2 ∈ ℂ ∧ (1 / 2) ∈ ℂ ∧ (𝐴𝐺𝐵) ∈ 𝑋)
15		ip1i.4	. . . . . . 7 ⊢ 𝑆 = ( ·_𝑠OLD ‘𝑈)
16	10, 15	nvsass 30660	. . . . . 6 ⊢ ((𝑈 ∈ NrmCVec ∧ (2 ∈ ℂ ∧ (1 / 2) ∈ ℂ ∧ (𝐴𝐺𝐵) ∈ 𝑋)) → ((2 · (1 / 2))𝑆(𝐴𝐺𝐵)) = (2𝑆((1 / 2)𝑆(𝐴𝐺𝐵))))
17	6, 14, 16	mp2an 691	. . . . 5 ⊢ ((2 · (1 / 2))𝑆(𝐴𝐺𝐵)) = (2𝑆((1 / 2)𝑆(𝐴𝐺𝐵)))
18	10, 15	nvsid 30659	. . . . . 6 ⊢ ((𝑈 ∈ NrmCVec ∧ (𝐴𝐺𝐵) ∈ 𝑋) → (1𝑆(𝐴𝐺𝐵)) = (𝐴𝐺𝐵))
19	6, 13, 18	mp2an 691	. . . . 5 ⊢ (1𝑆(𝐴𝐺𝐵)) = (𝐴𝐺𝐵)
20	4, 17, 19	3eqtr3i 2776	. . . 4 ⊢ (2𝑆((1 / 2)𝑆(𝐴𝐺𝐵))) = (𝐴𝐺𝐵)
21	20	oveq1i 7458	. . 3 ⊢ ((2𝑆((1 / 2)𝑆(𝐴𝐺𝐵)))𝑃𝐶) = ((𝐴𝐺𝐵)𝑃𝐶)
22		ip1i.7	. . . 4 ⊢ 𝑃 = (·_𝑖OLD‘𝑈)
23	10, 15	nvscl 30658	. . . . 5 ⊢ ((𝑈 ∈ NrmCVec ∧ (1 / 2) ∈ ℂ ∧ (𝐴𝐺𝐵) ∈ 𝑋) → ((1 / 2)𝑆(𝐴𝐺𝐵)) ∈ 𝑋)
24	6, 7, 13, 23	mp3an 1461	. . . 4 ⊢ ((1 / 2)𝑆(𝐴𝐺𝐵)) ∈ 𝑋
25		ipdiri.10	. . . 4 ⊢ 𝐶 ∈ 𝑋
26	10, 11, 15, 22, 5, 24, 25	ip2i 30860	. . 3 ⊢ ((2𝑆((1 / 2)𝑆(𝐴𝐺𝐵)))𝑃𝐶) = (2 · (((1 / 2)𝑆(𝐴𝐺𝐵))𝑃𝐶))
27	21, 26	eqtr3i 2770	. 2 ⊢ ((𝐴𝐺𝐵)𝑃𝐶) = (2 · (((1 / 2)𝑆(𝐴𝐺𝐵))𝑃𝐶))
28		neg1cn 12407	. . . . . 6 ⊢ -1 ∈ ℂ
29	10, 15	nvscl 30658	. . . . . 6 ⊢ ((𝑈 ∈ NrmCVec ∧ -1 ∈ ℂ ∧ 𝐵 ∈ 𝑋) → (-1𝑆𝐵) ∈ 𝑋)
30	6, 28, 9, 29	mp3an 1461	. . . . 5 ⊢ (-1𝑆𝐵) ∈ 𝑋
31	10, 11	nvgcl 30652	. . . . 5 ⊢ ((𝑈 ∈ NrmCVec ∧ 𝐴 ∈ 𝑋 ∧ (-1𝑆𝐵) ∈ 𝑋) → (𝐴𝐺(-1𝑆𝐵)) ∈ 𝑋)
32	6, 8, 30, 31	mp3an 1461	. . . 4 ⊢ (𝐴𝐺(-1𝑆𝐵)) ∈ 𝑋
33	10, 15	nvscl 30658	. . . 4 ⊢ ((𝑈 ∈ NrmCVec ∧ (1 / 2) ∈ ℂ ∧ (𝐴𝐺(-1𝑆𝐵)) ∈ 𝑋) → ((1 / 2)𝑆(𝐴𝐺(-1𝑆𝐵))) ∈ 𝑋)
34	6, 7, 32, 33	mp3an 1461	. . 3 ⊢ ((1 / 2)𝑆(𝐴𝐺(-1𝑆𝐵))) ∈ 𝑋
35	10, 11, 15, 22, 5, 24, 34, 25	ip1i 30859	. 2 ⊢ (((((1 / 2)𝑆(𝐴𝐺𝐵))𝐺((1 / 2)𝑆(𝐴𝐺(-1𝑆𝐵))))𝑃𝐶) + ((((1 / 2)𝑆(𝐴𝐺𝐵))𝐺(-1𝑆((1 / 2)𝑆(𝐴𝐺(-1𝑆𝐵)))))𝑃𝐶)) = (2 · (((1 / 2)𝑆(𝐴𝐺𝐵))𝑃𝐶))
36		eqid 2740	. . . . . . . . . . . 12 ⊢ (1^st ‘𝑈) = (1^st ‘𝑈)
37	36	nvvc 30647	. . . . . . . . . . 11 ⊢ (𝑈 ∈ NrmCVec → (1^st ‘𝑈) ∈ CVec_OLD)
38	6, 37	ax-mp 5	. . . . . . . . . 10 ⊢ (1^st ‘𝑈) ∈ CVec_OLD
39	11	vafval 30635	. . . . . . . . . . 11 ⊢ 𝐺 = (1^st ‘(1^st ‘𝑈))
40	39	vcablo 30601	. . . . . . . . . 10 ⊢ ((1^st ‘𝑈) ∈ CVec_OLD → 𝐺 ∈ AbelOp)
41	38, 40	ax-mp 5	. . . . . . . . 9 ⊢ 𝐺 ∈ AbelOp
42	8, 9	pm3.2i 470	. . . . . . . . 9 ⊢ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋)
43	8, 30	pm3.2i 470	. . . . . . . . 9 ⊢ (𝐴 ∈ 𝑋 ∧ (-1𝑆𝐵) ∈ 𝑋)
44	10, 11	bafval 30636	. . . . . . . . . 10 ⊢ 𝑋 = ran 𝐺
45	44	ablo4 30582	. . . . . . . . 9 ⊢ ((𝐺 ∈ AbelOp ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ (𝐴 ∈ 𝑋 ∧ (-1𝑆𝐵) ∈ 𝑋)) → ((𝐴𝐺𝐵)𝐺(𝐴𝐺(-1𝑆𝐵))) = ((𝐴𝐺𝐴)𝐺(𝐵𝐺(-1𝑆𝐵))))
46	41, 42, 43, 45	mp3an 1461	. . . . . . . 8 ⊢ ((𝐴𝐺𝐵)𝐺(𝐴𝐺(-1𝑆𝐵))) = ((𝐴𝐺𝐴)𝐺(𝐵𝐺(-1𝑆𝐵)))
47	15	smfval 30637	. . . . . . . . . . 11 ⊢ 𝑆 = (2^nd ‘(1^st ‘𝑈))
48	39, 47, 44	vc2OLD 30600	. . . . . . . . . 10 ⊢ (((1^st ‘𝑈) ∈ CVec_OLD ∧ 𝐴 ∈ 𝑋) → (𝐴𝐺𝐴) = (2𝑆𝐴))
49	38, 8, 48	mp2an 691	. . . . . . . . 9 ⊢ (𝐴𝐺𝐴) = (2𝑆𝐴)
50		eqid 2740	. . . . . . . . . . 11 ⊢ (0_vec‘𝑈) = (0_vec‘𝑈)
51	10, 11, 15, 50	nvrinv 30683	. . . . . . . . . 10 ⊢ ((𝑈 ∈ NrmCVec ∧ 𝐵 ∈ 𝑋) → (𝐵𝐺(-1𝑆𝐵)) = (0_vec‘𝑈))
52	6, 9, 51	mp2an 691	. . . . . . . . 9 ⊢ (𝐵𝐺(-1𝑆𝐵)) = (0_vec‘𝑈)
53	49, 52	oveq12i 7460	. . . . . . . 8 ⊢ ((𝐴𝐺𝐴)𝐺(𝐵𝐺(-1𝑆𝐵))) = ((2𝑆𝐴)𝐺(0_vec‘𝑈))
54	10, 15	nvscl 30658	. . . . . . . . . 10 ⊢ ((𝑈 ∈ NrmCVec ∧ 2 ∈ ℂ ∧ 𝐴 ∈ 𝑋) → (2𝑆𝐴) ∈ 𝑋)
55	6, 1, 8, 54	mp3an 1461	. . . . . . . . 9 ⊢ (2𝑆𝐴) ∈ 𝑋
56	10, 11, 50	nv0rid 30667	. . . . . . . . 9 ⊢ ((𝑈 ∈ NrmCVec ∧ (2𝑆𝐴) ∈ 𝑋) → ((2𝑆𝐴)𝐺(0_vec‘𝑈)) = (2𝑆𝐴))
57	6, 55, 56	mp2an 691	. . . . . . . 8 ⊢ ((2𝑆𝐴)𝐺(0_vec‘𝑈)) = (2𝑆𝐴)
58	46, 53, 57	3eqtri 2772	. . . . . . 7 ⊢ ((𝐴𝐺𝐵)𝐺(𝐴𝐺(-1𝑆𝐵))) = (2𝑆𝐴)
59	58	oveq2i 7459	. . . . . 6 ⊢ ((1 / 2)𝑆((𝐴𝐺𝐵)𝐺(𝐴𝐺(-1𝑆𝐵)))) = ((1 / 2)𝑆(2𝑆𝐴))
60	7, 1, 8	3pm3.2i 1339	. . . . . . 7 ⊢ ((1 / 2) ∈ ℂ ∧ 2 ∈ ℂ ∧ 𝐴 ∈ 𝑋)
61	10, 15	nvsass 30660	. . . . . . 7 ⊢ ((𝑈 ∈ NrmCVec ∧ ((1 / 2) ∈ ℂ ∧ 2 ∈ ℂ ∧ 𝐴 ∈ 𝑋)) → (((1 / 2) · 2)𝑆𝐴) = ((1 / 2)𝑆(2𝑆𝐴)))
62	6, 60, 61	mp2an 691	. . . . . 6 ⊢ (((1 / 2) · 2)𝑆𝐴) = ((1 / 2)𝑆(2𝑆𝐴))
63	59, 62	eqtr4i 2771	. . . . 5 ⊢ ((1 / 2)𝑆((𝐴𝐺𝐵)𝐺(𝐴𝐺(-1𝑆𝐵)))) = (((1 / 2) · 2)𝑆𝐴)
64	7, 13, 32	3pm3.2i 1339	. . . . . 6 ⊢ ((1 / 2) ∈ ℂ ∧ (𝐴𝐺𝐵) ∈ 𝑋 ∧ (𝐴𝐺(-1𝑆𝐵)) ∈ 𝑋)
65	10, 11, 15	nvdi 30662	. . . . . 6 ⊢ ((𝑈 ∈ NrmCVec ∧ ((1 / 2) ∈ ℂ ∧ (𝐴𝐺𝐵) ∈ 𝑋 ∧ (𝐴𝐺(-1𝑆𝐵)) ∈ 𝑋)) → ((1 / 2)𝑆((𝐴𝐺𝐵)𝐺(𝐴𝐺(-1𝑆𝐵)))) = (((1 / 2)𝑆(𝐴𝐺𝐵))𝐺((1 / 2)𝑆(𝐴𝐺(-1𝑆𝐵)))))
66	6, 64, 65	mp2an 691	. . . . 5 ⊢ ((1 / 2)𝑆((𝐴𝐺𝐵)𝐺(𝐴𝐺(-1𝑆𝐵)))) = (((1 / 2)𝑆(𝐴𝐺𝐵))𝐺((1 / 2)𝑆(𝐴𝐺(-1𝑆𝐵))))
67		ax-1cn 11242	. . . . . . . 8 ⊢ 1 ∈ ℂ
68	67, 1, 2	divcan1i 12038	. . . . . . 7 ⊢ ((1 / 2) · 2) = 1
69	68	oveq1i 7458	. . . . . 6 ⊢ (((1 / 2) · 2)𝑆𝐴) = (1𝑆𝐴)
70	10, 15	nvsid 30659	. . . . . . 7 ⊢ ((𝑈 ∈ NrmCVec ∧ 𝐴 ∈ 𝑋) → (1𝑆𝐴) = 𝐴)
71	6, 8, 70	mp2an 691	. . . . . 6 ⊢ (1𝑆𝐴) = 𝐴
72	69, 71	eqtri 2768	. . . . 5 ⊢ (((1 / 2) · 2)𝑆𝐴) = 𝐴
73	63, 66, 72	3eqtr3i 2776	. . . 4 ⊢ (((1 / 2)𝑆(𝐴𝐺𝐵))𝐺((1 / 2)𝑆(𝐴𝐺(-1𝑆𝐵)))) = 𝐴
74	73	oveq1i 7458	. . 3 ⊢ ((((1 / 2)𝑆(𝐴𝐺𝐵))𝐺((1 / 2)𝑆(𝐴𝐺(-1𝑆𝐵))))𝑃𝐶) = (𝐴𝑃𝐶)
75	28, 7	mulcomi 11298	. . . . . . . . 9 ⊢ (-1 · (1 / 2)) = ((1 / 2) · -1)
76	75	oveq1i 7458	. . . . . . . 8 ⊢ ((-1 · (1 / 2))𝑆(𝐴𝐺(-1𝑆𝐵))) = (((1 / 2) · -1)𝑆(𝐴𝐺(-1𝑆𝐵)))
77	28, 7, 32	3pm3.2i 1339	. . . . . . . . 9 ⊢ (-1 ∈ ℂ ∧ (1 / 2) ∈ ℂ ∧ (𝐴𝐺(-1𝑆𝐵)) ∈ 𝑋)
78	10, 15	nvsass 30660	. . . . . . . . 9 ⊢ ((𝑈 ∈ NrmCVec ∧ (-1 ∈ ℂ ∧ (1 / 2) ∈ ℂ ∧ (𝐴𝐺(-1𝑆𝐵)) ∈ 𝑋)) → ((-1 · (1 / 2))𝑆(𝐴𝐺(-1𝑆𝐵))) = (-1𝑆((1 / 2)𝑆(𝐴𝐺(-1𝑆𝐵)))))
79	6, 77, 78	mp2an 691	. . . . . . . 8 ⊢ ((-1 · (1 / 2))𝑆(𝐴𝐺(-1𝑆𝐵))) = (-1𝑆((1 / 2)𝑆(𝐴𝐺(-1𝑆𝐵))))
80	7, 28, 32	3pm3.2i 1339	. . . . . . . . . 10 ⊢ ((1 / 2) ∈ ℂ ∧ -1 ∈ ℂ ∧ (𝐴𝐺(-1𝑆𝐵)) ∈ 𝑋)
81	10, 15	nvsass 30660	. . . . . . . . . 10 ⊢ ((𝑈 ∈ NrmCVec ∧ ((1 / 2) ∈ ℂ ∧ -1 ∈ ℂ ∧ (𝐴𝐺(-1𝑆𝐵)) ∈ 𝑋)) → (((1 / 2) · -1)𝑆(𝐴𝐺(-1𝑆𝐵))) = ((1 / 2)𝑆(-1𝑆(𝐴𝐺(-1𝑆𝐵)))))
82	6, 80, 81	mp2an 691	. . . . . . . . 9 ⊢ (((1 / 2) · -1)𝑆(𝐴𝐺(-1𝑆𝐵))) = ((1 / 2)𝑆(-1𝑆(𝐴𝐺(-1𝑆𝐵))))
83	28, 8, 30	3pm3.2i 1339	. . . . . . . . . . . 12 ⊢ (-1 ∈ ℂ ∧ 𝐴 ∈ 𝑋 ∧ (-1𝑆𝐵) ∈ 𝑋)
84	10, 11, 15	nvdi 30662	. . . . . . . . . . . 12 ⊢ ((𝑈 ∈ NrmCVec ∧ (-1 ∈ ℂ ∧ 𝐴 ∈ 𝑋 ∧ (-1𝑆𝐵) ∈ 𝑋)) → (-1𝑆(𝐴𝐺(-1𝑆𝐵))) = ((-1𝑆𝐴)𝐺(-1𝑆(-1𝑆𝐵))))
85	6, 83, 84	mp2an 691	. . . . . . . . . . 11 ⊢ (-1𝑆(𝐴𝐺(-1𝑆𝐵))) = ((-1𝑆𝐴)𝐺(-1𝑆(-1𝑆𝐵)))
86		neg1mulneg1e1 12506	. . . . . . . . . . . . . 14 ⊢ (-1 · -1) = 1
87	86	oveq1i 7458	. . . . . . . . . . . . 13 ⊢ ((-1 · -1)𝑆𝐵) = (1𝑆𝐵)
88	28, 28, 9	3pm3.2i 1339	. . . . . . . . . . . . . 14 ⊢ (-1 ∈ ℂ ∧ -1 ∈ ℂ ∧ 𝐵 ∈ 𝑋)
89	10, 15	nvsass 30660	. . . . . . . . . . . . . 14 ⊢ ((𝑈 ∈ NrmCVec ∧ (-1 ∈ ℂ ∧ -1 ∈ ℂ ∧ 𝐵 ∈ 𝑋)) → ((-1 · -1)𝑆𝐵) = (-1𝑆(-1𝑆𝐵)))
90	6, 88, 89	mp2an 691	. . . . . . . . . . . . 13 ⊢ ((-1 · -1)𝑆𝐵) = (-1𝑆(-1𝑆𝐵))
91	10, 15	nvsid 30659	. . . . . . . . . . . . . 14 ⊢ ((𝑈 ∈ NrmCVec ∧ 𝐵 ∈ 𝑋) → (1𝑆𝐵) = 𝐵)
92	6, 9, 91	mp2an 691	. . . . . . . . . . . . 13 ⊢ (1𝑆𝐵) = 𝐵
93	87, 90, 92	3eqtr3i 2776	. . . . . . . . . . . 12 ⊢ (-1𝑆(-1𝑆𝐵)) = 𝐵
94	93	oveq2i 7459	. . . . . . . . . . 11 ⊢ ((-1𝑆𝐴)𝐺(-1𝑆(-1𝑆𝐵))) = ((-1𝑆𝐴)𝐺𝐵)
95	85, 94	eqtri 2768	. . . . . . . . . 10 ⊢ (-1𝑆(𝐴𝐺(-1𝑆𝐵))) = ((-1𝑆𝐴)𝐺𝐵)
96	95	oveq2i 7459	. . . . . . . . 9 ⊢ ((1 / 2)𝑆(-1𝑆(𝐴𝐺(-1𝑆𝐵)))) = ((1 / 2)𝑆((-1𝑆𝐴)𝐺𝐵))
97	82, 96	eqtri 2768	. . . . . . . 8 ⊢ (((1 / 2) · -1)𝑆(𝐴𝐺(-1𝑆𝐵))) = ((1 / 2)𝑆((-1𝑆𝐴)𝐺𝐵))
98	76, 79, 97	3eqtr3i 2776	. . . . . . 7 ⊢ (-1𝑆((1 / 2)𝑆(𝐴𝐺(-1𝑆𝐵)))) = ((1 / 2)𝑆((-1𝑆𝐴)𝐺𝐵))
99	98	oveq2i 7459	. . . . . 6 ⊢ (((1 / 2)𝑆(𝐴𝐺𝐵))𝐺(-1𝑆((1 / 2)𝑆(𝐴𝐺(-1𝑆𝐵))))) = (((1 / 2)𝑆(𝐴𝐺𝐵))𝐺((1 / 2)𝑆((-1𝑆𝐴)𝐺𝐵)))
100	10, 15	nvscl 30658	. . . . . . . . . 10 ⊢ ((𝑈 ∈ NrmCVec ∧ -1 ∈ ℂ ∧ 𝐴 ∈ 𝑋) → (-1𝑆𝐴) ∈ 𝑋)
101	6, 28, 8, 100	mp3an 1461	. . . . . . . . 9 ⊢ (-1𝑆𝐴) ∈ 𝑋
102	10, 11	nvgcl 30652	. . . . . . . . 9 ⊢ ((𝑈 ∈ NrmCVec ∧ (-1𝑆𝐴) ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → ((-1𝑆𝐴)𝐺𝐵) ∈ 𝑋)
103	6, 101, 9, 102	mp3an 1461	. . . . . . . 8 ⊢ ((-1𝑆𝐴)𝐺𝐵) ∈ 𝑋
104	7, 13, 103	3pm3.2i 1339	. . . . . . 7 ⊢ ((1 / 2) ∈ ℂ ∧ (𝐴𝐺𝐵) ∈ 𝑋 ∧ ((-1𝑆𝐴)𝐺𝐵) ∈ 𝑋)
105	10, 11, 15	nvdi 30662	. . . . . . 7 ⊢ ((𝑈 ∈ NrmCVec ∧ ((1 / 2) ∈ ℂ ∧ (𝐴𝐺𝐵) ∈ 𝑋 ∧ ((-1𝑆𝐴)𝐺𝐵) ∈ 𝑋)) → ((1 / 2)𝑆((𝐴𝐺𝐵)𝐺((-1𝑆𝐴)𝐺𝐵))) = (((1 / 2)𝑆(𝐴𝐺𝐵))𝐺((1 / 2)𝑆((-1𝑆𝐴)𝐺𝐵))))
106	6, 104, 105	mp2an 691	. . . . . 6 ⊢ ((1 / 2)𝑆((𝐴𝐺𝐵)𝐺((-1𝑆𝐴)𝐺𝐵))) = (((1 / 2)𝑆(𝐴𝐺𝐵))𝐺((1 / 2)𝑆((-1𝑆𝐴)𝐺𝐵)))
107	99, 106	eqtr4i 2771	. . . . 5 ⊢ (((1 / 2)𝑆(𝐴𝐺𝐵))𝐺(-1𝑆((1 / 2)𝑆(𝐴𝐺(-1𝑆𝐵))))) = ((1 / 2)𝑆((𝐴𝐺𝐵)𝐺((-1𝑆𝐴)𝐺𝐵)))
108	101, 9	pm3.2i 470	. . . . . . . . 9 ⊢ ((-1𝑆𝐴) ∈ 𝑋 ∧ 𝐵 ∈ 𝑋)
109	44	ablo4 30582	. . . . . . . . 9 ⊢ ((𝐺 ∈ AbelOp ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((-1𝑆𝐴) ∈ 𝑋 ∧ 𝐵 ∈ 𝑋)) → ((𝐴𝐺𝐵)𝐺((-1𝑆𝐴)𝐺𝐵)) = ((𝐴𝐺(-1𝑆𝐴))𝐺(𝐵𝐺𝐵)))
110	41, 42, 108, 109	mp3an 1461	. . . . . . . 8 ⊢ ((𝐴𝐺𝐵)𝐺((-1𝑆𝐴)𝐺𝐵)) = ((𝐴𝐺(-1𝑆𝐴))𝐺(𝐵𝐺𝐵))
111	10, 11, 15, 50	nvrinv 30683	. . . . . . . . . . 11 ⊢ ((𝑈 ∈ NrmCVec ∧ 𝐴 ∈ 𝑋) → (𝐴𝐺(-1𝑆𝐴)) = (0_vec‘𝑈))
112	6, 8, 111	mp2an 691	. . . . . . . . . 10 ⊢ (𝐴𝐺(-1𝑆𝐴)) = (0_vec‘𝑈)
113	112	oveq1i 7458	. . . . . . . . 9 ⊢ ((𝐴𝐺(-1𝑆𝐴))𝐺(𝐵𝐺𝐵)) = ((0_vec‘𝑈)𝐺(𝐵𝐺𝐵))
114	10, 11	nvgcl 30652	. . . . . . . . . . 11 ⊢ ((𝑈 ∈ NrmCVec ∧ 𝐵 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝐵𝐺𝐵) ∈ 𝑋)
115	6, 9, 9, 114	mp3an 1461	. . . . . . . . . 10 ⊢ (𝐵𝐺𝐵) ∈ 𝑋
116	10, 11, 50	nv0lid 30668	. . . . . . . . . 10 ⊢ ((𝑈 ∈ NrmCVec ∧ (𝐵𝐺𝐵) ∈ 𝑋) → ((0_vec‘𝑈)𝐺(𝐵𝐺𝐵)) = (𝐵𝐺𝐵))
117	6, 115, 116	mp2an 691	. . . . . . . . 9 ⊢ ((0_vec‘𝑈)𝐺(𝐵𝐺𝐵)) = (𝐵𝐺𝐵)
118	113, 117	eqtri 2768	. . . . . . . 8 ⊢ ((𝐴𝐺(-1𝑆𝐴))𝐺(𝐵𝐺𝐵)) = (𝐵𝐺𝐵)
119	39, 47, 44	vc2OLD 30600	. . . . . . . . 9 ⊢ (((1^st ‘𝑈) ∈ CVec_OLD ∧ 𝐵 ∈ 𝑋) → (𝐵𝐺𝐵) = (2𝑆𝐵))
120	38, 9, 119	mp2an 691	. . . . . . . 8 ⊢ (𝐵𝐺𝐵) = (2𝑆𝐵)
121	110, 118, 120	3eqtri 2772	. . . . . . 7 ⊢ ((𝐴𝐺𝐵)𝐺((-1𝑆𝐴)𝐺𝐵)) = (2𝑆𝐵)
122	121	oveq2i 7459	. . . . . 6 ⊢ ((1 / 2)𝑆((𝐴𝐺𝐵)𝐺((-1𝑆𝐴)𝐺𝐵))) = ((1 / 2)𝑆(2𝑆𝐵))
123	7, 1, 9	3pm3.2i 1339	. . . . . . 7 ⊢ ((1 / 2) ∈ ℂ ∧ 2 ∈ ℂ ∧ 𝐵 ∈ 𝑋)
124	10, 15	nvsass 30660	. . . . . . 7 ⊢ ((𝑈 ∈ NrmCVec ∧ ((1 / 2) ∈ ℂ ∧ 2 ∈ ℂ ∧ 𝐵 ∈ 𝑋)) → (((1 / 2) · 2)𝑆𝐵) = ((1 / 2)𝑆(2𝑆𝐵)))
125	6, 123, 124	mp2an 691	. . . . . 6 ⊢ (((1 / 2) · 2)𝑆𝐵) = ((1 / 2)𝑆(2𝑆𝐵))
126	68	oveq1i 7458	. . . . . 6 ⊢ (((1 / 2) · 2)𝑆𝐵) = (1𝑆𝐵)
127	122, 125, 126	3eqtr2i 2774	. . . . 5 ⊢ ((1 / 2)𝑆((𝐴𝐺𝐵)𝐺((-1𝑆𝐴)𝐺𝐵))) = (1𝑆𝐵)
128	107, 127, 92	3eqtri 2772	. . . 4 ⊢ (((1 / 2)𝑆(𝐴𝐺𝐵))𝐺(-1𝑆((1 / 2)𝑆(𝐴𝐺(-1𝑆𝐵))))) = 𝐵
129	128	oveq1i 7458	. . 3 ⊢ ((((1 / 2)𝑆(𝐴𝐺𝐵))𝐺(-1𝑆((1 / 2)𝑆(𝐴𝐺(-1𝑆𝐵)))))𝑃𝐶) = (𝐵𝑃𝐶)
130	74, 129	oveq12i 7460	. 2 ⊢ (((((1 / 2)𝑆(𝐴𝐺𝐵))𝐺((1 / 2)𝑆(𝐴𝐺(-1𝑆𝐵))))𝑃𝐶) + ((((1 / 2)𝑆(𝐴𝐺𝐵))𝐺(-1𝑆((1 / 2)𝑆(𝐴𝐺(-1𝑆𝐵)))))𝑃𝐶)) = ((𝐴𝑃𝐶) + (𝐵𝑃𝐶))
131	27, 35, 130	3eqtr2i 2774	1 ⊢ ((𝐴𝐺𝐵)𝑃𝐶) = ((𝐴𝑃𝐶) + (𝐵𝑃𝐶))

Colors of variables: wff setvar class

Syntax hints: ∧ wa 395 ∧ w3a 1087 = wceq 1537 ∈ wcel 2108 ‘cfv 6573 (class class class)co 7448 1^st c1st 8028 ℂcc 11182 1c1 11185 + caddc 11187 · cmul 11189 -cneg 11521 / cdiv 11947 2c2 12348 AbelOpcablo 30576 CVec_OLDcvc 30590 NrmCVeccnv 30616 +_𝑣 cpv 30617 BaseSetcba 30618 ·_𝑠OLD cns 30619 0_veccn0v 30620 ·_𝑖OLDcdip 30732 CPreHil_OLDccphlo 30844

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1793 ax-4 1807 ax-5 1909 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2158 ax-12 2178 ax-ext 2711 ax-rep 5303 ax-sep 5317 ax-nul 5324 ax-pow 5383 ax-pr 5447 ax-un 7770 ax-inf2 9710 ax-cnex 11240 ax-resscn 11241 ax-1cn 11242 ax-icn 11243 ax-addcl 11244 ax-addrcl 11245 ax-mulcl 11246 ax-mulrcl 11247 ax-mulcom 11248 ax-addass 11249 ax-mulass 11250 ax-distr 11251 ax-i2m1 11252 ax-1ne0 11253 ax-1rid 11254 ax-rnegex 11255 ax-rrecex 11256 ax-cnre 11257 ax-pre-lttri 11258 ax-pre-lttrn 11259 ax-pre-ltadd 11260 ax-pre-mulgt0 11261 ax-pre-sup 11262

This theorem depends on definitions: df-bi 207 df-an 396 df-or 847 df-3or 1088 df-3an 1089 df-tru 1540 df-fal 1550 df-ex 1778 df-nf 1782 df-sb 2065 df-mo 2543 df-eu 2572 df-clab 2718 df-cleq 2732 df-clel 2819 df-nfc 2895 df-ne 2947 df-nel 3053 df-ral 3068 df-rex 3077 df-rmo 3388 df-reu 3389 df-rab 3444 df-v 3490 df-sbc 3805 df-csb 3922 df-dif 3979 df-un 3981 df-in 3983 df-ss 3993 df-pss 3996 df-nul 4353 df-if 4549 df-pw 4624 df-sn 4649 df-pr 4651 df-op 4655 df-uni 4932 df-int 4971 df-iun 5017 df-br 5167 df-opab 5229 df-mpt 5250 df-tr 5284 df-id 5593 df-eprel 5599 df-po 5607 df-so 5608 df-fr 5652 df-se 5653 df-we 5654 df-xp 5706 df-rel 5707 df-cnv 5708 df-co 5709 df-dm 5710 df-rn 5711 df-res 5712 df-ima 5713 df-pred 6332 df-ord 6398 df-on 6399 df-lim 6400 df-suc 6401 df-iota 6525 df-fun 6575 df-fn 6576 df-f 6577 df-f1 6578 df-fo 6579 df-f1o 6580 df-fv 6581 df-isom 6582 df-riota 7404 df-ov 7451 df-oprab 7452 df-mpo 7453 df-om 7904 df-1st 8030 df-2nd 8031 df-frecs 8322 df-wrecs 8353 df-recs 8427 df-rdg 8466 df-1o 8522 df-er 8763 df-en 9004 df-dom 9005 df-sdom 9006 df-fin 9007 df-sup 9511 df-oi 9579 df-card 10008 df-pnf 11326 df-mnf 11327 df-xr 11328 df-ltxr 11329 df-le 11330 df-sub 11522 df-neg 11523 df-div 11948 df-nn 12294 df-2 12356 df-3 12357 df-4 12358 df-n0 12554 df-z 12640 df-uz 12904 df-rp 13058 df-fz 13568 df-fzo 13712 df-seq 14053 df-exp 14113 df-hash 14380 df-cj 15148 df-re 15149 df-im 15150 df-sqrt 15284 df-abs 15285 df-clim 15534 df-sum 15735 df-grpo 30525 df-gid 30526 df-ginv 30527 df-ablo 30577 df-vc 30591 df-nv 30624 df-va 30627 df-ba 30628 df-sm 30629 df-0v 30630 df-nmcv 30632 df-dip 30733 df-ph 30845

This theorem is referenced by: ipdiri 30862

W3C validator