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Theorem gsumzadd 18708

Description: The sum of two group sums. (Contributed by Mario Carneiro, 25-Apr-2016.) (Revised by AV, 5-Jun-2019.)

**Hypotheses**
Ref	Expression
gsumzadd.b	⊢ 𝐵 = (Base‘𝐺)
gsumzadd.0	⊢ 0 = (0_g‘𝐺)
gsumzadd.p	⊢ + = (+_g‘𝐺)
gsumzadd.z	⊢ 𝑍 = (Cntz‘𝐺)
gsumzadd.g	⊢ (𝜑 → 𝐺 ∈ Mnd)
gsumzadd.a	⊢ (𝜑 → 𝐴 ∈ 𝑉)
gsumzadd.fn	⊢ (𝜑 → 𝐹 finSupp 0 )
gsumzadd.hn	⊢ (𝜑 → 𝐻 finSupp 0 )
gsumzadd.s	⊢ (𝜑 → 𝑆 ∈ (SubMnd‘𝐺))
gsumzadd.c	⊢ (𝜑 → 𝑆 ⊆ (𝑍‘𝑆))
gsumzadd.f	⊢ (𝜑 → 𝐹:𝐴⟶𝑆)
gsumzadd.h	⊢ (𝜑 → 𝐻:𝐴⟶𝑆)

**Assertion**
Ref	Expression
gsumzadd	⊢ (𝜑 → (𝐺 Σ_g (𝐹 ∘_𝑓 + 𝐻)) = ((𝐺 Σ_g 𝐹) + (𝐺 Σ_g 𝐻)))

Proof of Theorem gsumzadd Dummy variables 𝑘 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		gsumzadd.b	. 2 ⊢ 𝐵 = (Base‘𝐺)
2		gsumzadd.0	. 2 ⊢ 0 = (0_g‘𝐺)
3		gsumzadd.p	. 2 ⊢ + = (+_g‘𝐺)
4		gsumzadd.z	. 2 ⊢ 𝑍 = (Cntz‘𝐺)
5		gsumzadd.g	. 2 ⊢ (𝜑 → 𝐺 ∈ Mnd)
6		gsumzadd.a	. 2 ⊢ (𝜑 → 𝐴 ∈ 𝑉)
7		gsumzadd.fn	. 2 ⊢ (𝜑 → 𝐹 finSupp 0 )
8		gsumzadd.hn	. 2 ⊢ (𝜑 → 𝐻 finSupp 0 )
9		eqid 2777	. 2 ⊢ ((𝐹 ∪ 𝐻) supp 0 ) = ((𝐹 ∪ 𝐻) supp 0 )
10		gsumzadd.f	. . 3 ⊢ (𝜑 → 𝐹:𝐴⟶𝑆)
11		gsumzadd.s	. . . 4 ⊢ (𝜑 → 𝑆 ∈ (SubMnd‘𝐺))
12	1	submss 17736	. . . 4 ⊢ (𝑆 ∈ (SubMnd‘𝐺) → 𝑆 ⊆ 𝐵)
13	11, 12	syl 17	. . 3 ⊢ (𝜑 → 𝑆 ⊆ 𝐵)
14	10, 13	fssd 6305	. 2 ⊢ (𝜑 → 𝐹:𝐴⟶𝐵)
15		gsumzadd.h	. . 3 ⊢ (𝜑 → 𝐻:𝐴⟶𝑆)
16	15, 13	fssd 6305	. 2 ⊢ (𝜑 → 𝐻:𝐴⟶𝐵)
17		gsumzadd.c	. . 3 ⊢ (𝜑 → 𝑆 ⊆ (𝑍‘𝑆))
18	10	frnd 6298	. . 3 ⊢ (𝜑 → ran 𝐹 ⊆ 𝑆)
19	4	cntzidss 18153	. . 3 ⊢ ((𝑆 ⊆ (𝑍‘𝑆) ∧ ran 𝐹 ⊆ 𝑆) → ran 𝐹 ⊆ (𝑍‘ran 𝐹))
20	17, 18, 19	syl2anc 579	. 2 ⊢ (𝜑 → ran 𝐹 ⊆ (𝑍‘ran 𝐹))
21	15	frnd 6298	. . 3 ⊢ (𝜑 → ran 𝐻 ⊆ 𝑆)
22	4	cntzidss 18153	. . 3 ⊢ ((𝑆 ⊆ (𝑍‘𝑆) ∧ ran 𝐻 ⊆ 𝑆) → ran 𝐻 ⊆ (𝑍‘ran 𝐻))
23	17, 21, 22	syl2anc 579	. 2 ⊢ (𝜑 → ran 𝐻 ⊆ (𝑍‘ran 𝐻))
24	3	submcl 17739	. . . . . . 7 ⊢ ((𝑆 ∈ (SubMnd‘𝐺) ∧ 𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆) → (𝑥 + 𝑦) ∈ 𝑆)
25	24	3expb 1110	. . . . . 6 ⊢ ((𝑆 ∈ (SubMnd‘𝐺) ∧ (𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆)) → (𝑥 + 𝑦) ∈ 𝑆)
26	11, 25	sylan 575	. . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆)) → (𝑥 + 𝑦) ∈ 𝑆)
27		inidm 4042	. . . . 5 ⊢ (𝐴 ∩ 𝐴) = 𝐴
28	26, 10, 15, 6, 6, 27	off 7189	. . . 4 ⊢ (𝜑 → (𝐹 ∘_𝑓 + 𝐻):𝐴⟶𝑆)
29	28	frnd 6298	. . 3 ⊢ (𝜑 → ran (𝐹 ∘_𝑓 + 𝐻) ⊆ 𝑆)
30	4	cntzidss 18153	. . 3 ⊢ ((𝑆 ⊆ (𝑍‘𝑆) ∧ ran (𝐹 ∘_𝑓 + 𝐻) ⊆ 𝑆) → ran (𝐹 ∘_𝑓 + 𝐻) ⊆ (𝑍‘ran (𝐹 ∘_𝑓 + 𝐻)))
31	17, 29, 30	syl2anc 579	. 2 ⊢ (𝜑 → ran (𝐹 ∘_𝑓 + 𝐻) ⊆ (𝑍‘ran (𝐹 ∘_𝑓 + 𝐻)))
32	17	adantr 474	. . . 4 ⊢ ((𝜑 ∧ (𝑥 ⊆ 𝐴 ∧ 𝑘 ∈ (𝐴 ∖ 𝑥))) → 𝑆 ⊆ (𝑍‘𝑆))
33	13	adantr 474	. . . . 5 ⊢ ((𝜑 ∧ (𝑥 ⊆ 𝐴 ∧ 𝑘 ∈ (𝐴 ∖ 𝑥))) → 𝑆 ⊆ 𝐵)
34	5	adantr 474	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑥 ⊆ 𝐴 ∧ 𝑘 ∈ (𝐴 ∖ 𝑥))) → 𝐺 ∈ Mnd)
35		vex 3400	. . . . . . . 8 ⊢ 𝑥 ∈ V
36	35	a1i 11	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑥 ⊆ 𝐴 ∧ 𝑘 ∈ (𝐴 ∖ 𝑥))) → 𝑥 ∈ V)
37	11	adantr 474	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑥 ⊆ 𝐴 ∧ 𝑘 ∈ (𝐴 ∖ 𝑥))) → 𝑆 ∈ (SubMnd‘𝐺))
38		simpl 476	. . . . . . . 8 ⊢ ((𝑥 ⊆ 𝐴 ∧ 𝑘 ∈ (𝐴 ∖ 𝑥)) → 𝑥 ⊆ 𝐴)
39		fssres 6320	. . . . . . . 8 ⊢ ((𝐻:𝐴⟶𝑆 ∧ 𝑥 ⊆ 𝐴) → (𝐻 ↾ 𝑥):𝑥⟶𝑆)
40	15, 38, 39	syl2an 589	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑥 ⊆ 𝐴 ∧ 𝑘 ∈ (𝐴 ∖ 𝑥))) → (𝐻 ↾ 𝑥):𝑥⟶𝑆)
41	23	adantr 474	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑥 ⊆ 𝐴 ∧ 𝑘 ∈ (𝐴 ∖ 𝑥))) → ran 𝐻 ⊆ (𝑍‘ran 𝐻))
42		resss 5671	. . . . . . . . 9 ⊢ (𝐻 ↾ 𝑥) ⊆ 𝐻
43		rnss 5599	. . . . . . . . 9 ⊢ ((𝐻 ↾ 𝑥) ⊆ 𝐻 → ran (𝐻 ↾ 𝑥) ⊆ ran 𝐻)
44	42, 43	ax-mp 5	. . . . . . . 8 ⊢ ran (𝐻 ↾ 𝑥) ⊆ ran 𝐻
45	4	cntzidss 18153	. . . . . . . 8 ⊢ ((ran 𝐻 ⊆ (𝑍‘ran 𝐻) ∧ ran (𝐻 ↾ 𝑥) ⊆ ran 𝐻) → ran (𝐻 ↾ 𝑥) ⊆ (𝑍‘ran (𝐻 ↾ 𝑥)))
46	41, 44, 45	sylancl 580	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑥 ⊆ 𝐴 ∧ 𝑘 ∈ (𝐴 ∖ 𝑥))) → ran (𝐻 ↾ 𝑥) ⊆ (𝑍‘ran (𝐻 ↾ 𝑥)))
47	15	ffund 6295	. . . . . . . . . 10 ⊢ (𝜑 → Fun 𝐻)
48		funres 6177	. . . . . . . . . 10 ⊢ (Fun 𝐻 → Fun (𝐻 ↾ 𝑥))
49	47, 48	syl 17	. . . . . . . . 9 ⊢ (𝜑 → Fun (𝐻 ↾ 𝑥))
50	49	adantr 474	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑥 ⊆ 𝐴 ∧ 𝑘 ∈ (𝐴 ∖ 𝑥))) → Fun (𝐻 ↾ 𝑥))
51	8	fsuppimpd 8570	. . . . . . . . . 10 ⊢ (𝜑 → (𝐻 supp 0 ) ∈ Fin)
52	51	adantr 474	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑥 ⊆ 𝐴 ∧ 𝑘 ∈ (𝐴 ∖ 𝑥))) → (𝐻 supp 0 ) ∈ Fin)
53		fex 6761	. . . . . . . . . . . 12 ⊢ ((𝐻:𝐴⟶𝑆 ∧ 𝐴 ∈ 𝑉) → 𝐻 ∈ V)
54	15, 6, 53	syl2anc 579	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐻 ∈ V)
55	2	fvexi 6460	. . . . . . . . . . 11 ⊢ 0 ∈ V
56		ressuppss 7595	. . . . . . . . . . 11 ⊢ ((𝐻 ∈ V ∧ 0 ∈ V) → ((𝐻 ↾ 𝑥) supp 0 ) ⊆ (𝐻 supp 0 ))
57	54, 55, 56	sylancl 580	. . . . . . . . . 10 ⊢ (𝜑 → ((𝐻 ↾ 𝑥) supp 0 ) ⊆ (𝐻 supp 0 ))
58	57	adantr 474	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑥 ⊆ 𝐴 ∧ 𝑘 ∈ (𝐴 ∖ 𝑥))) → ((𝐻 ↾ 𝑥) supp 0 ) ⊆ (𝐻 supp 0 ))
59		ssfi 8468	. . . . . . . . 9 ⊢ (((𝐻 supp 0 ) ∈ Fin ∧ ((𝐻 ↾ 𝑥) supp 0 ) ⊆ (𝐻 supp 0 )) → ((𝐻 ↾ 𝑥) supp 0 ) ∈ Fin)
60	52, 58, 59	syl2anc 579	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑥 ⊆ 𝐴 ∧ 𝑘 ∈ (𝐴 ∖ 𝑥))) → ((𝐻 ↾ 𝑥) supp 0 ) ∈ Fin)
61		resfunexg 6751	. . . . . . . . . . 11 ⊢ ((Fun 𝐻 ∧ 𝑥 ∈ V) → (𝐻 ↾ 𝑥) ∈ V)
62	47, 35, 61	sylancl 580	. . . . . . . . . 10 ⊢ (𝜑 → (𝐻 ↾ 𝑥) ∈ V)
63		isfsupp 8567	. . . . . . . . . 10 ⊢ (((𝐻 ↾ 𝑥) ∈ V ∧ 0 ∈ V) → ((𝐻 ↾ 𝑥) finSupp 0 ↔ (Fun (𝐻 ↾ 𝑥) ∧ ((𝐻 ↾ 𝑥) supp 0 ) ∈ Fin)))
64	62, 55, 63	sylancl 580	. . . . . . . . 9 ⊢ (𝜑 → ((𝐻 ↾ 𝑥) finSupp 0 ↔ (Fun (𝐻 ↾ 𝑥) ∧ ((𝐻 ↾ 𝑥) supp 0 ) ∈ Fin)))
65	64	adantr 474	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑥 ⊆ 𝐴 ∧ 𝑘 ∈ (𝐴 ∖ 𝑥))) → ((𝐻 ↾ 𝑥) finSupp 0 ↔ (Fun (𝐻 ↾ 𝑥) ∧ ((𝐻 ↾ 𝑥) supp 0 ) ∈ Fin)))
66	50, 60, 65	mpbir2and 703	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑥 ⊆ 𝐴 ∧ 𝑘 ∈ (𝐴 ∖ 𝑥))) → (𝐻 ↾ 𝑥) finSupp 0 )
67	2, 4, 34, 36, 37, 40, 46, 66	gsumzsubmcl 18704	. . . . . 6 ⊢ ((𝜑 ∧ (𝑥 ⊆ 𝐴 ∧ 𝑘 ∈ (𝐴 ∖ 𝑥))) → (𝐺 Σ_g (𝐻 ↾ 𝑥)) ∈ 𝑆)
68	67	snssd 4571	. . . . 5 ⊢ ((𝜑 ∧ (𝑥 ⊆ 𝐴 ∧ 𝑘 ∈ (𝐴 ∖ 𝑥))) → {(𝐺 Σ_g (𝐻 ↾ 𝑥))} ⊆ 𝑆)
69	1, 4	cntz2ss 18148	. . . . 5 ⊢ ((𝑆 ⊆ 𝐵 ∧ {(𝐺 Σ_g (𝐻 ↾ 𝑥))} ⊆ 𝑆) → (𝑍‘𝑆) ⊆ (𝑍‘{(𝐺 Σ_g (𝐻 ↾ 𝑥))}))
70	33, 68, 69	syl2anc 579	. . . 4 ⊢ ((𝜑 ∧ (𝑥 ⊆ 𝐴 ∧ 𝑘 ∈ (𝐴 ∖ 𝑥))) → (𝑍‘𝑆) ⊆ (𝑍‘{(𝐺 Σ_g (𝐻 ↾ 𝑥))}))
71	32, 70	sstrd 3830	. . 3 ⊢ ((𝜑 ∧ (𝑥 ⊆ 𝐴 ∧ 𝑘 ∈ (𝐴 ∖ 𝑥))) → 𝑆 ⊆ (𝑍‘{(𝐺 Σ_g (𝐻 ↾ 𝑥))}))
72		eldifi 3954	. . . . 5 ⊢ (𝑘 ∈ (𝐴 ∖ 𝑥) → 𝑘 ∈ 𝐴)
73	72	adantl 475	. . . 4 ⊢ ((𝑥 ⊆ 𝐴 ∧ 𝑘 ∈ (𝐴 ∖ 𝑥)) → 𝑘 ∈ 𝐴)
74		ffvelrn 6621	. . . 4 ⊢ ((𝐹:𝐴⟶𝑆 ∧ 𝑘 ∈ 𝐴) → (𝐹‘𝑘) ∈ 𝑆)
75	10, 73, 74	syl2an 589	. . 3 ⊢ ((𝜑 ∧ (𝑥 ⊆ 𝐴 ∧ 𝑘 ∈ (𝐴 ∖ 𝑥))) → (𝐹‘𝑘) ∈ 𝑆)
76	71, 75	sseldd 3821	. 2 ⊢ ((𝜑 ∧ (𝑥 ⊆ 𝐴 ∧ 𝑘 ∈ (𝐴 ∖ 𝑥))) → (𝐹‘𝑘) ∈ (𝑍‘{(𝐺 Σ_g (𝐻 ↾ 𝑥))}))
77	1, 2, 3, 4, 5, 6, 7, 8, 9, 14, 16, 20, 23, 31, 76	gsumzaddlem 18707	1 ⊢ (𝜑 → (𝐺 Σ_g (𝐹 ∘_𝑓 + 𝐻)) = ((𝐺 Σ_g 𝐹) + (𝐺 Σ_g 𝐻)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 198 ∧ wa 386 = wceq 1601 ∈ wcel 2106 Vcvv 3397 ∖ cdif 3788 ∪ cun 3789 ⊆ wss 3791 {csn 4397 class class class wbr 4886 ran crn 5356 ↾ cres 5357 Fun wfun 6129 ⟶wf 6131 ‘cfv 6135 (class class class)co 6922 ∘_𝑓 cof 7172 supp csupp 7576 Fincfn 8241 finSupp cfsupp 8563 Basecbs 16255 +_gcplusg 16338 0_gc0g 16486 Σ_g cgsu 16487 Mndcmnd 17680 SubMndcsubmnd 17720 Cntzccntz 18131

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1839 ax-4 1853 ax-5 1953 ax-6 2021 ax-7 2054 ax-8 2108 ax-9 2115 ax-10 2134 ax-11 2149 ax-12 2162 ax-13 2333 ax-ext 2753 ax-rep 5006 ax-sep 5017 ax-nul 5025 ax-pow 5077 ax-pr 5138 ax-un 7226 ax-cnex 10328 ax-resscn 10329 ax-1cn 10330 ax-icn 10331 ax-addcl 10332 ax-addrcl 10333 ax-mulcl 10334 ax-mulrcl 10335 ax-mulcom 10336 ax-addass 10337 ax-mulass 10338 ax-distr 10339 ax-i2m1 10340 ax-1ne0 10341 ax-1rid 10342 ax-rnegex 10343 ax-rrecex 10344 ax-cnre 10345 ax-pre-lttri 10346 ax-pre-lttrn 10347 ax-pre-ltadd 10348 ax-pre-mulgt0 10349

This theorem depends on definitions: df-bi 199 df-an 387 df-or 837 df-3or 1072 df-3an 1073 df-tru 1605 df-ex 1824 df-nf 1828 df-sb 2012 df-mo 2550 df-eu 2586 df-clab 2763 df-cleq 2769 df-clel 2773 df-nfc 2920 df-ne 2969 df-nel 3075 df-ral 3094 df-rex 3095 df-reu 3096 df-rmo 3097 df-rab 3098 df-v 3399 df-sbc 3652 df-csb 3751 df-dif 3794 df-un 3796 df-in 3798 df-ss 3805 df-pss 3807 df-nul 4141 df-if 4307 df-pw 4380 df-sn 4398 df-pr 4400 df-tp 4402 df-op 4404 df-uni 4672 df-int 4711 df-iun 4755 df-br 4887 df-opab 4949 df-mpt 4966 df-tr 4988 df-id 5261 df-eprel 5266 df-po 5274 df-so 5275 df-fr 5314 df-se 5315 df-we 5316 df-xp 5361 df-rel 5362 df-cnv 5363 df-co 5364 df-dm 5365 df-rn 5366 df-res 5367 df-ima 5368 df-pred 5933 df-ord 5979 df-on 5980 df-lim 5981 df-suc 5982 df-iota 6099 df-fun 6137 df-fn 6138 df-f 6139 df-f1 6140 df-fo 6141 df-f1o 6142 df-fv 6143 df-isom 6144 df-riota 6883 df-ov 6925 df-oprab 6926 df-mpt2 6927 df-of 7174 df-om 7344 df-1st 7445 df-2nd 7446 df-supp 7577 df-wrecs 7689 df-recs 7751 df-rdg 7789 df-1o 7843 df-oadd 7847 df-er 8026 df-en 8242 df-dom 8243 df-sdom 8244 df-fin 8245 df-fsupp 8564 df-oi 8704 df-card 9098 df-pnf 10413 df-mnf 10414 df-xr 10415 df-ltxr 10416 df-le 10417 df-sub 10608 df-neg 10609 df-nn 11375 df-2 11438 df-n0 11643 df-z 11729 df-uz 11993 df-fz 12644 df-fzo 12785 df-seq 13120 df-hash 13436 df-ndx 16258 df-slot 16259 df-base 16261 df-sets 16262 df-ress 16263 df-plusg 16351 df-0g 16488 df-gsum 16489 df-mgm 17628 df-sgrp 17670 df-mnd 17681 df-submnd 17722 df-cntz 18133

This theorem is referenced by: gsumadd 18709 gsumzsplit 18713

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