Theorem subgdisj1 17927

Description: Vectors belonging to disjoint commuting subgroups are uniquely determined by their sum. (Contributed by NM, 2-Apr-2014.) (Revised by Mario Carneiro, 19-Apr-2016.)

Hypotheses

Ref	Expression
subgdisj.p	⊢ + = (+g‘𝐺)
subgdisj.o	⊢ 0 = (0g‘𝐺)
subgdisj.z	⊢ 𝑍 = (Cntz‘𝐺)
subgdisj.t	⊢ (𝜑 → 𝑇 ∈ (SubGrp‘𝐺))
subgdisj.u	⊢ (𝜑 → 𝑈 ∈ (SubGrp‘𝐺))
subgdisj.i	⊢ (𝜑 → (𝑇 ∩ 𝑈) = { 0 })
subgdisj.s	⊢ (𝜑 → 𝑇 ⊆ (𝑍‘𝑈))
subgdisj.a	⊢ (𝜑 → 𝐴 ∈ 𝑇)
subgdisj.c	⊢ (𝜑 → 𝐶 ∈ 𝑇)
subgdisj.b	⊢ (𝜑 → 𝐵 ∈ 𝑈)
subgdisj.d	⊢ (𝜑 → 𝐷 ∈ 𝑈)
subgdisj.j	⊢ (𝜑 → (𝐴 + 𝐵) = (𝐶 + 𝐷))

Assertion

Ref	Expression
subgdisj1	⊢ (𝜑 → 𝐴 = 𝐶)

Proof of Theorem subgdisj1

Step	Hyp	Ref	Expression
1		subgdisj.t	. . . . . 6 ⊢ (𝜑 → 𝑇 ∈ (SubGrp‘𝐺))
2		subgdisj.a	. . . . . 6 ⊢ (𝜑 → 𝐴 ∈ 𝑇)
3		subgdisj.c	. . . . . 6 ⊢ (𝜑 → 𝐶 ∈ 𝑇)
4		eqid 2610	. . . . . . 7 ⊢ (-g‘𝐺) = (-g‘𝐺)
5	4	subgsubcl 17428	. . . . . 6 ⊢ ((𝑇 ∈ (SubGrp‘𝐺) ∧ 𝐴 ∈ 𝑇 ∧ 𝐶 ∈ 𝑇) → (𝐴(-g‘𝐺)𝐶) ∈ 𝑇)
6	1, 2, 3, 5	syl3anc 1318	. . . . 5 ⊢ (𝜑 → (𝐴(-g‘𝐺)𝐶) ∈ 𝑇)
7		subgdisj.j	. . . . . . . . 9 ⊢ (𝜑 → (𝐴 + 𝐵) = (𝐶 + 𝐷))
8		subgdisj.s	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑇 ⊆ (𝑍‘𝑈))
9	8, 3	sseldd 3569	. . . . . . . . . 10 ⊢ (𝜑 → 𝐶 ∈ (𝑍‘𝑈))
10		subgdisj.b	. . . . . . . . . 10 ⊢ (𝜑 → 𝐵 ∈ 𝑈)
11		subgdisj.p	. . . . . . . . . . 11 ⊢ + = (+g‘𝐺)
12		subgdisj.z	. . . . . . . . . . 11 ⊢ 𝑍 = (Cntz‘𝐺)
13	11, 12	cntzi 17585	. . . . . . . . . 10 ⊢ ((𝐶 ∈ (𝑍‘𝑈) ∧ 𝐵 ∈ 𝑈) → (𝐶 + 𝐵) = (𝐵 + 𝐶))
14	9, 10, 13	syl2anc 691	. . . . . . . . 9 ⊢ (𝜑 → (𝐶 + 𝐵) = (𝐵 + 𝐶))
15	7, 14	oveq12d 6567	. . . . . . . 8 ⊢ (𝜑 → ((𝐴 + 𝐵)(-g‘𝐺)(𝐶 + 𝐵)) = ((𝐶 + 𝐷)(-g‘𝐺)(𝐵 + 𝐶)))
16		subgrcl 17422	. . . . . . . . . 10 ⊢ (𝑇 ∈ (SubGrp‘𝐺) → 𝐺 ∈ Grp)
17	1, 16	syl 17	. . . . . . . . 9 ⊢ (𝜑 → 𝐺 ∈ Grp)
18		eqid 2610	. . . . . . . . . . . . 13 ⊢ (Base‘𝐺) = (Base‘𝐺)
19	18	subgss 17418	. . . . . . . . . . . 12 ⊢ (𝑇 ∈ (SubGrp‘𝐺) → 𝑇 ⊆ (Base‘𝐺))
20	1, 19	syl 17	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑇 ⊆ (Base‘𝐺))
21	20, 2	sseldd 3569	. . . . . . . . . 10 ⊢ (𝜑 → 𝐴 ∈ (Base‘𝐺))
22		subgdisj.u	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝑈 ∈ (SubGrp‘𝐺))
23	18	subgss 17418	. . . . . . . . . . . 12 ⊢ (𝑈 ∈ (SubGrp‘𝐺) → 𝑈 ⊆ (Base‘𝐺))
24	22, 23	syl 17	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑈 ⊆ (Base‘𝐺))
25	24, 10	sseldd 3569	. . . . . . . . . 10 ⊢ (𝜑 → 𝐵 ∈ (Base‘𝐺))
26	18, 11	grpcl 17253	. . . . . . . . . 10 ⊢ ((𝐺 ∈ Grp ∧ 𝐴 ∈ (Base‘𝐺) ∧ 𝐵 ∈ (Base‘𝐺)) → (𝐴 + 𝐵) ∈ (Base‘𝐺))
27	17, 21, 25, 26	syl3anc 1318	. . . . . . . . 9 ⊢ (𝜑 → (𝐴 + 𝐵) ∈ (Base‘𝐺))
28	20, 3	sseldd 3569	. . . . . . . . 9 ⊢ (𝜑 → 𝐶 ∈ (Base‘𝐺))
29	18, 11, 4	grpsubsub4 17331	. . . . . . . . 9 ⊢ ((𝐺 ∈ Grp ∧ ((𝐴 + 𝐵) ∈ (Base‘𝐺) ∧ 𝐵 ∈ (Base‘𝐺) ∧ 𝐶 ∈ (Base‘𝐺))) → (((𝐴 + 𝐵)(-g‘𝐺)𝐵)(-g‘𝐺)𝐶) = ((𝐴 + 𝐵)(-g‘𝐺)(𝐶 + 𝐵)))
30	17, 27, 25, 28, 29	syl13anc 1320	. . . . . . . 8 ⊢ (𝜑 → (((𝐴 + 𝐵)(-g‘𝐺)𝐵)(-g‘𝐺)𝐶) = ((𝐴 + 𝐵)(-g‘𝐺)(𝐶 + 𝐵)))
31	7, 27	eqeltrrd 2689	. . . . . . . . 9 ⊢ (𝜑 → (𝐶 + 𝐷) ∈ (Base‘𝐺))
32	18, 11, 4	grpsubsub4 17331	. . . . . . . . 9 ⊢ ((𝐺 ∈ Grp ∧ ((𝐶 + 𝐷) ∈ (Base‘𝐺) ∧ 𝐶 ∈ (Base‘𝐺) ∧ 𝐵 ∈ (Base‘𝐺))) → (((𝐶 + 𝐷)(-g‘𝐺)𝐶)(-g‘𝐺)𝐵) = ((𝐶 + 𝐷)(-g‘𝐺)(𝐵 + 𝐶)))
33	17, 31, 28, 25, 32	syl13anc 1320	. . . . . . . 8 ⊢ (𝜑 → (((𝐶 + 𝐷)(-g‘𝐺)𝐶)(-g‘𝐺)𝐵) = ((𝐶 + 𝐷)(-g‘𝐺)(𝐵 + 𝐶)))
34	15, 30, 33	3eqtr4d 2654	. . . . . . 7 ⊢ (𝜑 → (((𝐴 + 𝐵)(-g‘𝐺)𝐵)(-g‘𝐺)𝐶) = (((𝐶 + 𝐷)(-g‘𝐺)𝐶)(-g‘𝐺)𝐵))
35	18, 11, 4	grppncan 17329	. . . . . . . . 9 ⊢ ((𝐺 ∈ Grp ∧ 𝐴 ∈ (Base‘𝐺) ∧ 𝐵 ∈ (Base‘𝐺)) → ((𝐴 + 𝐵)(-g‘𝐺)𝐵) = 𝐴)
36	17, 21, 25, 35	syl3anc 1318	. . . . . . . 8 ⊢ (𝜑 → ((𝐴 + 𝐵)(-g‘𝐺)𝐵) = 𝐴)
37	36	oveq1d 6564	. . . . . . 7 ⊢ (𝜑 → (((𝐴 + 𝐵)(-g‘𝐺)𝐵)(-g‘𝐺)𝐶) = (𝐴(-g‘𝐺)𝐶))
38		subgdisj.d	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐷 ∈ 𝑈)
39	11, 12	cntzi 17585	. . . . . . . . . . 11 ⊢ ((𝐶 ∈ (𝑍‘𝑈) ∧ 𝐷 ∈ 𝑈) → (𝐶 + 𝐷) = (𝐷 + 𝐶))
40	9, 38, 39	syl2anc 691	. . . . . . . . . 10 ⊢ (𝜑 → (𝐶 + 𝐷) = (𝐷 + 𝐶))
41	40	oveq1d 6564	. . . . . . . . 9 ⊢ (𝜑 → ((𝐶 + 𝐷)(-g‘𝐺)𝐶) = ((𝐷 + 𝐶)(-g‘𝐺)𝐶))
42	24, 38	sseldd 3569	. . . . . . . . . 10 ⊢ (𝜑 → 𝐷 ∈ (Base‘𝐺))
43	18, 11, 4	grppncan 17329	. . . . . . . . . 10 ⊢ ((𝐺 ∈ Grp ∧ 𝐷 ∈ (Base‘𝐺) ∧ 𝐶 ∈ (Base‘𝐺)) → ((𝐷 + 𝐶)(-g‘𝐺)𝐶) = 𝐷)
44	17, 42, 28, 43	syl3anc 1318	. . . . . . . . 9 ⊢ (𝜑 → ((𝐷 + 𝐶)(-g‘𝐺)𝐶) = 𝐷)
45	41, 44	eqtrd 2644	. . . . . . . 8 ⊢ (𝜑 → ((𝐶 + 𝐷)(-g‘𝐺)𝐶) = 𝐷)
46	45	oveq1d 6564	. . . . . . 7 ⊢ (𝜑 → (((𝐶 + 𝐷)(-g‘𝐺)𝐶)(-g‘𝐺)𝐵) = (𝐷(-g‘𝐺)𝐵))
47	34, 37, 46	3eqtr3d 2652	. . . . . 6 ⊢ (𝜑 → (𝐴(-g‘𝐺)𝐶) = (𝐷(-g‘𝐺)𝐵))
48	4	subgsubcl 17428	. . . . . . 7 ⊢ ((𝑈 ∈ (SubGrp‘𝐺) ∧ 𝐷 ∈ 𝑈 ∧ 𝐵 ∈ 𝑈) → (𝐷(-g‘𝐺)𝐵) ∈ 𝑈)
49	22, 38, 10, 48	syl3anc 1318	. . . . . 6 ⊢ (𝜑 → (𝐷(-g‘𝐺)𝐵) ∈ 𝑈)
50	47, 49	eqeltrd 2688	. . . . 5 ⊢ (𝜑 → (𝐴(-g‘𝐺)𝐶) ∈ 𝑈)
51	6, 50	elind 3760	. . . 4 ⊢ (𝜑 → (𝐴(-g‘𝐺)𝐶) ∈ (𝑇 ∩ 𝑈))
52		subgdisj.i	. . . 4 ⊢ (𝜑 → (𝑇 ∩ 𝑈) = { 0 })
53	51, 52	eleqtrd 2690	. . 3 ⊢ (𝜑 → (𝐴(-g‘𝐺)𝐶) ∈ { 0 })
54		elsni 4142	. . 3 ⊢ ((𝐴(-g‘𝐺)𝐶) ∈ { 0 } → (𝐴(-g‘𝐺)𝐶) = 0 )
55	53, 54	syl 17	. 2 ⊢ (𝜑 → (𝐴(-g‘𝐺)𝐶) = 0 )
56		subgdisj.o	. . . 4 ⊢ 0 = (0g‘𝐺)
57	18, 56, 4	grpsubeq0 17324	. . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝐴 ∈ (Base‘𝐺) ∧ 𝐶 ∈ (Base‘𝐺)) → ((𝐴(-g‘𝐺)𝐶) = 0 ↔ 𝐴 = 𝐶))
58	17, 21, 28, 57	syl3anc 1318	. 2 ⊢ (𝜑 → ((𝐴(-g‘𝐺)𝐶) = 0 ↔ 𝐴 = 𝐶))
59	55, 58	mpbid 221	1 ⊢ (𝜑 → 𝐴 = 𝐶)

Syntax hints:   → wi 4   ↔ wb 195   = wceq 1475   ∈ wcel 1977   ∩ cin 3539   ⊆ wss 3540  {csn 4125  ‘cfv 5804  (class class class)co 6549  Basecbs 15695  +_gcplusg 15768  0_gc0g 15923  Grpcgrp 17245  -_gcsg 17247  SubGrpcsubg 17411  Cntzccntz 17571

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-rep 4699  ax-sep 4709  ax-nul 4717  ax-pow 4769  ax-pr 4833  ax-un 6847  ax-cnex 9871  ax-resscn 9872  ax-1cn 9873  ax-icn 9874  ax-addcl 9875  ax-addrcl 9876  ax-mulcl 9877  ax-mulrcl 9878  ax-mulcom 9879  ax-addass 9880  ax-mulass 9881  ax-distr 9882  ax-i2m1 9883  ax-1ne0 9884  ax-1rid 9885  ax-rnegex 9886  ax-rrecex 9887  ax-cnre 9888  ax-pre-lttri 9889  ax-pre-lttrn 9890  ax-pre-ltadd 9891  ax-pre-mulgt0 9892

This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3or 1032  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-nel 2783  df-ral 2901  df-rex 2902  df-reu 2903  df-rmo 2904  df-rab 2905  df-v 3175  df-sbc 3403  df-csb 3500  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-pss 3556  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-tp 4130  df-op 4132  df-uni 4373  df-iun 4457  df-br 4584  df-opab 4644  df-mpt 4645  df-tr 4681  df-eprel 4949  df-id 4953  df-po 4959  df-so 4960  df-fr 4997  df-we 4999  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-rn 5049  df-res 5050  df-ima 5051  df-pred 5597  df-ord 5643  df-on 5644  df-lim 5645  df-suc 5646  df-iota 5768  df-fun 5806  df-fn 5807  df-f 5808  df-f1 5809  df-fo 5810  df-f1o 5811  df-fv 5812  df-riota 6511  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-om 6958  df-1st 7059  df-2nd 7060  df-wrecs 7294  df-recs 7355  df-rdg 7393  df-er 7629  df-en 7842  df-dom 7843  df-sdom 7844  df-pnf 9955  df-mnf 9956  df-xr 9957  df-ltxr 9958  df-le 9959  df-sub 10147  df-neg 10148  df-nn 10898  df-2 10956  df-ndx 15698  df-slot 15699  df-base 15700  df-sets 15701  df-ress 15702  df-plusg 15781  df-0g 15925  df-mgm 17065  df-sgrp 17107  df-mnd 17118  df-grp 17248  df-minusg 17249  df-sbg 17250  df-subg 17414  df-cntz 17573

This theorem is referenced by:  subgdisj2  17928  subgdisjb  17929  lvecindp  18959