Theorem tsmssplit 22762

Description: Split a topological group sum into two parts. (Contributed by Mario Carneiro, 19-Sep-2015.) (Proof shortened by AV, 24-Jul-2019.)

Hypotheses

Ref	Expression
tsmssplit.b	⊢ 𝐵 = (Base‘𝐺)
tsmssplit.p	⊢ + = (+g‘𝐺)
tsmssplit.1	⊢ (𝜑 → 𝐺 ∈ CMnd)
tsmssplit.2	⊢ (𝜑 → 𝐺 ∈ TopMnd)
tsmssplit.a	⊢ (𝜑 → 𝐴 ∈ 𝑉)
tsmssplit.f	⊢ (𝜑 → 𝐹:𝐴⟶𝐵)
tsmssplit.x	⊢ (𝜑 → 𝑋 ∈ (𝐺 tsums (𝐹 ↾ 𝐶)))
tsmssplit.y	⊢ (𝜑 → 𝑌 ∈ (𝐺 tsums (𝐹 ↾ 𝐷)))
tsmssplit.i	⊢ (𝜑 → (𝐶 ∩ 𝐷) = ∅)
tsmssplit.u	⊢ (𝜑 → 𝐴 = (𝐶 ∪ 𝐷))

Assertion

Ref	Expression
tsmssplit	⊢ (𝜑 → (𝑋 + 𝑌) ∈ (𝐺 tsums 𝐹))

Proof of Theorem tsmssplit

Dummy variable 𝑘 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		tsmssplit.b	. . 3 ⊢ 𝐵 = (Base‘𝐺)
2		tsmssplit.p	. . 3 ⊢ + = (+g‘𝐺)
3		tsmssplit.1	. . 3 ⊢ (𝜑 → 𝐺 ∈ CMnd)
4		tsmssplit.2	. . 3 ⊢ (𝜑 → 𝐺 ∈ TopMnd)
5		tsmssplit.a	. . 3 ⊢ (𝜑 → 𝐴 ∈ 𝑉)
6		tsmssplit.f	. . . . . 6 ⊢ (𝜑 → 𝐹:𝐴⟶𝐵)
7	6	ffvelrnda 6853	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → (𝐹‘𝑘) ∈ 𝐵)
8		cmnmnd 18924	. . . . . . . 8 ⊢ (𝐺 ∈ CMnd → 𝐺 ∈ Mnd)
9	3, 8	syl 17	. . . . . . 7 ⊢ (𝜑 → 𝐺 ∈ Mnd)
10		eqid 2823	. . . . . . . 8 ⊢ (0g‘𝐺) = (0g‘𝐺)
11	1, 10	mndidcl 17928	. . . . . . 7 ⊢ (𝐺 ∈ Mnd → (0g‘𝐺) ∈ 𝐵)
12	9, 11	syl 17	. . . . . 6 ⊢ (𝜑 → (0g‘𝐺) ∈ 𝐵)
13	12	adantr 483	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → (0g‘𝐺) ∈ 𝐵)
14	7, 13	ifcld 4514	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺)) ∈ 𝐵)
15	14	fmpttd 6881	. . 3 ⊢ (𝜑 → (𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺))):𝐴⟶𝐵)
16	7, 13	ifcld 4514	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺)) ∈ 𝐵)
17	16	fmpttd 6881	. . 3 ⊢ (𝜑 → (𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺))):𝐴⟶𝐵)
18		tsmssplit.x	. . . 4 ⊢ (𝜑 → 𝑋 ∈ (𝐺 tsums (𝐹 ↾ 𝐶)))
19	6	feqmptd 6735	. . . . . . . 8 ⊢ (𝜑 → 𝐹 = (𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘)))
20	19	reseq1d 5854	. . . . . . 7 ⊢ (𝜑 → (𝐹 ↾ 𝐶) = ((𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘)) ↾ 𝐶))
21		ssun1 4150	. . . . . . . . 9 ⊢ 𝐶 ⊆ (𝐶 ∪ 𝐷)
22		tsmssplit.u	. . . . . . . . 9 ⊢ (𝜑 → 𝐴 = (𝐶 ∪ 𝐷))
23	21, 22	sseqtrrid 4022	. . . . . . . 8 ⊢ (𝜑 → 𝐶 ⊆ 𝐴)
24		iftrue 4475	. . . . . . . . . 10 ⊢ (𝑘 ∈ 𝐶 → if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺)) = (𝐹‘𝑘))
25	24	mpteq2ia 5159	. . . . . . . . 9 ⊢ (𝑘 ∈ 𝐶 ↦ if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺))) = (𝑘 ∈ 𝐶 ↦ (𝐹‘𝑘))
26		resmpt 5907	. . . . . . . . 9 ⊢ (𝐶 ⊆ 𝐴 → ((𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺))) ↾ 𝐶) = (𝑘 ∈ 𝐶 ↦ if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺))))
27		resmpt 5907	. . . . . . . . 9 ⊢ (𝐶 ⊆ 𝐴 → ((𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘)) ↾ 𝐶) = (𝑘 ∈ 𝐶 ↦ (𝐹‘𝑘)))
28	25, 26, 27	3eqtr4a 2884	. . . . . . . 8 ⊢ (𝐶 ⊆ 𝐴 → ((𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺))) ↾ 𝐶) = ((𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘)) ↾ 𝐶))
29	23, 28	syl 17	. . . . . . 7 ⊢ (𝜑 → ((𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺))) ↾ 𝐶) = ((𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘)) ↾ 𝐶))
30	20, 29	eqtr4d 2861	. . . . . 6 ⊢ (𝜑 → (𝐹 ↾ 𝐶) = ((𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺))) ↾ 𝐶))
31	30	oveq2d 7174	. . . . 5 ⊢ (𝜑 → (𝐺 tsums (𝐹 ↾ 𝐶)) = (𝐺 tsums ((𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺))) ↾ 𝐶)))
32		tmdtps 22686	. . . . . . 7 ⊢ (𝐺 ∈ TopMnd → 𝐺 ∈ TopSp)
33	4, 32	syl 17	. . . . . 6 ⊢ (𝜑 → 𝐺 ∈ TopSp)
34		eldifn 4106	. . . . . . . . 9 ⊢ (𝑘 ∈ (𝐴 ∖ 𝐶) → ¬ 𝑘 ∈ 𝐶)
35	34	adantl 484	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝐴 ∖ 𝐶)) → ¬ 𝑘 ∈ 𝐶)
36	35	iffalsed 4480	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝐴 ∖ 𝐶)) → if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺)) = (0g‘𝐺))
37	36, 5	suppss2 7866	. . . . . 6 ⊢ (𝜑 → ((𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺))) supp (0g‘𝐺)) ⊆ 𝐶)
38	1, 10, 3, 33, 5, 15, 37	tsmsres 22754	. . . . 5 ⊢ (𝜑 → (𝐺 tsums ((𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺))) ↾ 𝐶)) = (𝐺 tsums (𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺)))))
39	31, 38	eqtrd 2858	. . . 4 ⊢ (𝜑 → (𝐺 tsums (𝐹 ↾ 𝐶)) = (𝐺 tsums (𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺)))))
40	18, 39	eleqtrd 2917	. . 3 ⊢ (𝜑 → 𝑋 ∈ (𝐺 tsums (𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺)))))
41		tsmssplit.y	. . . 4 ⊢ (𝜑 → 𝑌 ∈ (𝐺 tsums (𝐹 ↾ 𝐷)))
42	19	reseq1d 5854	. . . . . . 7 ⊢ (𝜑 → (𝐹 ↾ 𝐷) = ((𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘)) ↾ 𝐷))
43		ssun2 4151	. . . . . . . . 9 ⊢ 𝐷 ⊆ (𝐶 ∪ 𝐷)
44	43, 22	sseqtrrid 4022	. . . . . . . 8 ⊢ (𝜑 → 𝐷 ⊆ 𝐴)
45		iftrue 4475	. . . . . . . . . 10 ⊢ (𝑘 ∈ 𝐷 → if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺)) = (𝐹‘𝑘))
46	45	mpteq2ia 5159	. . . . . . . . 9 ⊢ (𝑘 ∈ 𝐷 ↦ if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺))) = (𝑘 ∈ 𝐷 ↦ (𝐹‘𝑘))
47		resmpt 5907	. . . . . . . . 9 ⊢ (𝐷 ⊆ 𝐴 → ((𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺))) ↾ 𝐷) = (𝑘 ∈ 𝐷 ↦ if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺))))
48		resmpt 5907	. . . . . . . . 9 ⊢ (𝐷 ⊆ 𝐴 → ((𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘)) ↾ 𝐷) = (𝑘 ∈ 𝐷 ↦ (𝐹‘𝑘)))
49	46, 47, 48	3eqtr4a 2884	. . . . . . . 8 ⊢ (𝐷 ⊆ 𝐴 → ((𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺))) ↾ 𝐷) = ((𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘)) ↾ 𝐷))
50	44, 49	syl 17	. . . . . . 7 ⊢ (𝜑 → ((𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺))) ↾ 𝐷) = ((𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘)) ↾ 𝐷))
51	42, 50	eqtr4d 2861	. . . . . 6 ⊢ (𝜑 → (𝐹 ↾ 𝐷) = ((𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺))) ↾ 𝐷))
52	51	oveq2d 7174	. . . . 5 ⊢ (𝜑 → (𝐺 tsums (𝐹 ↾ 𝐷)) = (𝐺 tsums ((𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺))) ↾ 𝐷)))
53		eldifn 4106	. . . . . . . . 9 ⊢ (𝑘 ∈ (𝐴 ∖ 𝐷) → ¬ 𝑘 ∈ 𝐷)
54	53	adantl 484	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝐴 ∖ 𝐷)) → ¬ 𝑘 ∈ 𝐷)
55	54	iffalsed 4480	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝐴 ∖ 𝐷)) → if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺)) = (0g‘𝐺))
56	55, 5	suppss2 7866	. . . . . 6 ⊢ (𝜑 → ((𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺))) supp (0g‘𝐺)) ⊆ 𝐷)
57	1, 10, 3, 33, 5, 17, 56	tsmsres 22754	. . . . 5 ⊢ (𝜑 → (𝐺 tsums ((𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺))) ↾ 𝐷)) = (𝐺 tsums (𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺)))))
58	52, 57	eqtrd 2858	. . . 4 ⊢ (𝜑 → (𝐺 tsums (𝐹 ↾ 𝐷)) = (𝐺 tsums (𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺)))))
59	41, 58	eleqtrd 2917	. . 3 ⊢ (𝜑 → 𝑌 ∈ (𝐺 tsums (𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺)))))
60	1, 2, 3, 4, 5, 15, 17, 40, 59	tsmsadd 22757	. 2 ⊢ (𝜑 → (𝑋 + 𝑌) ∈ (𝐺 tsums ((𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺))) ∘f + (𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺))))))
61	24	adantl 484	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝐴) ∧ 𝑘 ∈ 𝐶) → if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺)) = (𝐹‘𝑘))
62		tsmssplit.i	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (𝐶 ∩ 𝐷) = ∅)
63		noel 4298	. . . . . . . . . . . . . . . 16 ⊢ ¬ 𝑘 ∈ ∅
64		eleq2 2903	. . . . . . . . . . . . . . . 16 ⊢ ((𝐶 ∩ 𝐷) = ∅ → (𝑘 ∈ (𝐶 ∩ 𝐷) ↔ 𝑘 ∈ ∅))
65	63, 64	mtbiri 329	. . . . . . . . . . . . . . 15 ⊢ ((𝐶 ∩ 𝐷) = ∅ → ¬ 𝑘 ∈ (𝐶 ∩ 𝐷))
66	62, 65	syl 17	. . . . . . . . . . . . . 14 ⊢ (𝜑 → ¬ 𝑘 ∈ (𝐶 ∩ 𝐷))
67	66	adantr 483	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → ¬ 𝑘 ∈ (𝐶 ∩ 𝐷))
68		elin 4171	. . . . . . . . . . . . 13 ⊢ (𝑘 ∈ (𝐶 ∩ 𝐷) ↔ (𝑘 ∈ 𝐶 ∧ 𝑘 ∈ 𝐷))
69	67, 68	sylnib 330	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → ¬ (𝑘 ∈ 𝐶 ∧ 𝑘 ∈ 𝐷))
70		imnan 402	. . . . . . . . . . . 12 ⊢ ((𝑘 ∈ 𝐶 → ¬ 𝑘 ∈ 𝐷) ↔ ¬ (𝑘 ∈ 𝐶 ∧ 𝑘 ∈ 𝐷))
71	69, 70	sylibr 236	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → (𝑘 ∈ 𝐶 → ¬ 𝑘 ∈ 𝐷))
72	71	imp 409	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝐴) ∧ 𝑘 ∈ 𝐶) → ¬ 𝑘 ∈ 𝐷)
73	72	iffalsed 4480	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝐴) ∧ 𝑘 ∈ 𝐶) → if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺)) = (0g‘𝐺))
74	61, 73	oveq12d 7176	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝐴) ∧ 𝑘 ∈ 𝐶) → (if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺)) + if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺))) = ((𝐹‘𝑘) + (0g‘𝐺)))
75	1, 2, 10	mndrid 17934	. . . . . . . . . 10 ⊢ ((𝐺 ∈ Mnd ∧ (𝐹‘𝑘) ∈ 𝐵) → ((𝐹‘𝑘) + (0g‘𝐺)) = (𝐹‘𝑘))
76	9, 7, 75	syl2an2r 683	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → ((𝐹‘𝑘) + (0g‘𝐺)) = (𝐹‘𝑘))
77	76	adantr 483	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝐴) ∧ 𝑘 ∈ 𝐶) → ((𝐹‘𝑘) + (0g‘𝐺)) = (𝐹‘𝑘))
78	74, 77	eqtrd 2858	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝐴) ∧ 𝑘 ∈ 𝐶) → (if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺)) + if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺))) = (𝐹‘𝑘))
79	71	con2d 136	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → (𝑘 ∈ 𝐷 → ¬ 𝑘 ∈ 𝐶))
80	79	imp 409	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝐴) ∧ 𝑘 ∈ 𝐷) → ¬ 𝑘 ∈ 𝐶)
81	80	iffalsed 4480	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝐴) ∧ 𝑘 ∈ 𝐷) → if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺)) = (0g‘𝐺))
82	45	adantl 484	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝐴) ∧ 𝑘 ∈ 𝐷) → if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺)) = (𝐹‘𝑘))
83	81, 82	oveq12d 7176	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝐴) ∧ 𝑘 ∈ 𝐷) → (if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺)) + if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺))) = ((0g‘𝐺) + (𝐹‘𝑘)))
84	1, 2, 10	mndlid 17933	. . . . . . . . . 10 ⊢ ((𝐺 ∈ Mnd ∧ (𝐹‘𝑘) ∈ 𝐵) → ((0g‘𝐺) + (𝐹‘𝑘)) = (𝐹‘𝑘))
85	9, 7, 84	syl2an2r 683	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → ((0g‘𝐺) + (𝐹‘𝑘)) = (𝐹‘𝑘))
86	85	adantr 483	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝐴) ∧ 𝑘 ∈ 𝐷) → ((0g‘𝐺) + (𝐹‘𝑘)) = (𝐹‘𝑘))
87	83, 86	eqtrd 2858	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝐴) ∧ 𝑘 ∈ 𝐷) → (if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺)) + if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺))) = (𝐹‘𝑘))
88	22	eleq2d 2900	. . . . . . . . 9 ⊢ (𝜑 → (𝑘 ∈ 𝐴 ↔ 𝑘 ∈ (𝐶 ∪ 𝐷)))
89		elun 4127	. . . . . . . . 9 ⊢ (𝑘 ∈ (𝐶 ∪ 𝐷) ↔ (𝑘 ∈ 𝐶 ∨ 𝑘 ∈ 𝐷))
90	88, 89	syl6bb 289	. . . . . . . 8 ⊢ (𝜑 → (𝑘 ∈ 𝐴 ↔ (𝑘 ∈ 𝐶 ∨ 𝑘 ∈ 𝐷)))
91	90	biimpa 479	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → (𝑘 ∈ 𝐶 ∨ 𝑘 ∈ 𝐷))
92	78, 87, 91	mpjaodan 955	. . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → (if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺)) + if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺))) = (𝐹‘𝑘))
93	92	mpteq2dva 5163	. . . . 5 ⊢ (𝜑 → (𝑘 ∈ 𝐴 ↦ (if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺)) + if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺)))) = (𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘)))
94	19, 93	eqtr4d 2861	. . . 4 ⊢ (𝜑 → 𝐹 = (𝑘 ∈ 𝐴 ↦ (if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺)) + if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺)))))
95		eqidd 2824	. . . . 5 ⊢ (𝜑 → (𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺))) = (𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺))))
96		eqidd 2824	. . . . 5 ⊢ (𝜑 → (𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺))) = (𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺))))
97	5, 14, 16, 95, 96	offval2 7428	. . . 4 ⊢ (𝜑 → ((𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺))) ∘f + (𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺)))) = (𝑘 ∈ 𝐴 ↦ (if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺)) + if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺)))))
98	94, 97	eqtr4d 2861	. . 3 ⊢ (𝜑 → 𝐹 = ((𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺))) ∘f + (𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺)))))
99	98	oveq2d 7174	. 2 ⊢ (𝜑 → (𝐺 tsums 𝐹) = (𝐺 tsums ((𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐶, (𝐹‘𝑘), (0g‘𝐺))) ∘f + (𝑘 ∈ 𝐴 ↦ if(𝑘 ∈ 𝐷, (𝐹‘𝑘), (0g‘𝐺))))))
100	60, 99	eleqtrrd 2918	1 ⊢ (𝜑 → (𝑋 + 𝑌) ∈ (𝐺 tsums 𝐹))

Syntax hints:  ¬ wn 3   → wi 4   ∧ wa 398   ∨ wo 843   = wceq 1537   ∈ wcel 2114   ∖ cdif 3935   ∪ cun 3936   ∩ cin 3937   ⊆ wss 3938  ∅c0 4293  ifcif 4469   ↦ cmpt 5148   ↾ cres 5559  ⟶wf 6353  ‘cfv 6357  (class class class)co 7158   ∘_f cof 7409  Basecbs 16485  +_gcplusg 16567  0_gc0g 16715  Mndcmnd 17913  CMndccmn 18908  TopSpctps 21542  TopMndctmd 22680   tsums ctsu 22736

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2795  ax-rep 5192  ax-sep 5205  ax-nul 5212  ax-pow 5268  ax-pr 5332  ax-un 7463  ax-cnex 10595  ax-resscn 10596  ax-1cn 10597  ax-icn 10598  ax-addcl 10599  ax-addrcl 10600  ax-mulcl 10601  ax-mulrcl 10602  ax-mulcom 10603  ax-addass 10604  ax-mulass 10605  ax-distr 10606  ax-i2m1 10607  ax-1ne0 10608  ax-1rid 10609  ax-rnegex 10610  ax-rrecex 10611  ax-cnre 10612  ax-pre-lttri 10613  ax-pre-lttrn 10614  ax-pre-ltadd 10615  ax-pre-mulgt0 10616

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3or 1084  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2802  df-cleq 2816  df-clel 2895  df-nfc 2965  df-ne 3019  df-nel 3126  df-ral 3145  df-rex 3146  df-reu 3147  df-rmo 3148  df-rab 3149  df-v 3498  df-sbc 3775  df-csb 3886  df-dif 3941  df-un 3943  df-in 3945  df-ss 3954  df-pss 3956  df-nul 4294  df-if 4470  df-pw 4543  df-sn 4570  df-pr 4572  df-tp 4574  df-op 4576  df-uni 4841  df-int 4879  df-iun 4923  df-br 5069  df-opab 5131  df-mpt 5149  df-tr 5175  df-id 5462  df-eprel 5467  df-po 5476  df-so 5477  df-fr 5516  df-se 5517  df-we 5518  df-xp 5563  df-rel 5564  df-cnv 5565  df-co 5566  df-dm 5567  df-rn 5568  df-res 5569  df-ima 5570  df-pred 6150  df-ord 6196  df-on 6197  df-lim 6198  df-suc 6199  df-iota 6316  df-fun 6359  df-fn 6360  df-f 6361  df-f1 6362  df-fo 6363  df-f1o 6364  df-fv 6365  df-isom 6366  df-riota 7116  df-ov 7161  df-oprab 7162  df-mpo 7163  df-of 7411  df-om 7583  df-1st 7691  df-2nd 7692  df-supp 7833  df-wrecs 7949  df-recs 8010  df-rdg 8048  df-1o 8104  df-oadd 8108  df-er 8291  df-map 8410  df-en 8512  df-dom 8513  df-sdom 8514  df-fin 8515  df-fsupp 8836  df-oi 8976  df-card 9370  df-pnf 10679  df-mnf 10680  df-xr 10681  df-ltxr 10682  df-le 10683  df-sub 10874  df-neg 10875  df-nn 11641  df-2 11703  df-n0 11901  df-z 11985  df-uz 12247  df-fz 12896  df-fzo 13037  df-seq 13373  df-hash 13694  df-ndx 16488  df-slot 16489  df-base 16491  df-sets 16492  df-ress 16493  df-plusg 16580  df-0g 16717  df-gsum 16718  df-topgen 16719  df-plusf 17853  df-mgm 17854  df-sgrp 17903  df-mnd 17914  df-submnd 17959  df-cntz 18449  df-cmn 18910  df-fbas 20544  df-fg 20545  df-top 21504  df-topon 21521  df-topsp 21543  df-bases 21556  df-ntr 21630  df-nei 21708  df-cn 21837  df-cnp 21838  df-tx 22172  df-fil 22456  df-fm 22548  df-flim 22549  df-flf 22550  df-tmd 22682  df-tsms 22737

This theorem is referenced by:  esumsplit  31314