Theorem lsmspsn 19084

Description: Member of subspace sum of spans of singletons. (Contributed by NM, 8-Apr-2015.)

Hypotheses

Ref	Expression
lsmspsn.v	⊢ 𝑉 = (Base‘𝑊)
lsmspsn.a	⊢ + = (+g‘𝑊)
lsmspsn.f	⊢ 𝐹 = (Scalar‘𝑊)
lsmspsn.k	⊢ 𝐾 = (Base‘𝐹)
lsmspsn.t	⊢ · = ( ·𝑠 ‘𝑊)
lsmspsn.p	⊢ ⊕ = (LSSum‘𝑊)
lsmspsn.n	⊢ 𝑁 = (LSpan‘𝑊)
lsmspsn.w	⊢ (𝜑 → 𝑊 ∈ LMod)
lsmspsn.x	⊢ (𝜑 → 𝑋 ∈ 𝑉)
lsmspsn.y	⊢ (𝜑 → 𝑌 ∈ 𝑉)

Assertion

Ref	Expression
lsmspsn	⊢ (𝜑 → (𝑈 ∈ ((𝑁‘{𝑋}) ⊕ (𝑁‘{𝑌})) ↔ ∃𝑗 ∈ 𝐾 ∃𝑘 ∈ 𝐾 𝑈 = ((𝑗 · 𝑋) + (𝑘 · 𝑌))))

Distinct variable groups:   𝑗,𝑘, +   𝑗,𝐹,𝑘   𝑗,𝐾,𝑘   𝑗,𝑁,𝑘   · ,𝑗,𝑘   𝑈,𝑗,𝑘   𝑗,𝑉,𝑘   𝑗,𝑊,𝑘   𝑗,𝑋,𝑘   𝑗,𝑌,𝑘   𝜑,𝑗,𝑘

Allowed substitution hints:   ⊕ (𝑗,𝑘)

Proof of Theorem lsmspsn

Dummy variables 𝑣 𝑤 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		lsmspsn.w	. . . 4 ⊢ (𝜑 → 𝑊 ∈ LMod)
2		lsmspsn.x	. . . 4 ⊢ (𝜑 → 𝑋 ∈ 𝑉)
3		lsmspsn.v	. . . . 5 ⊢ 𝑉 = (Base‘𝑊)
4		lsmspsn.n	. . . . 5 ⊢ 𝑁 = (LSpan‘𝑊)
5	3, 4	lspsnsubg 18980	. . . 4 ⊢ ((𝑊 ∈ LMod ∧ 𝑋 ∈ 𝑉) → (𝑁‘{𝑋}) ∈ (SubGrp‘𝑊))
6	1, 2, 5	syl2anc 693	. . 3 ⊢ (𝜑 → (𝑁‘{𝑋}) ∈ (SubGrp‘𝑊))
7		lsmspsn.y	. . . 4 ⊢ (𝜑 → 𝑌 ∈ 𝑉)
8	3, 4	lspsnsubg 18980	. . . 4 ⊢ ((𝑊 ∈ LMod ∧ 𝑌 ∈ 𝑉) → (𝑁‘{𝑌}) ∈ (SubGrp‘𝑊))
9	1, 7, 8	syl2anc 693	. . 3 ⊢ (𝜑 → (𝑁‘{𝑌}) ∈ (SubGrp‘𝑊))
10		lsmspsn.a	. . . 4 ⊢ + = (+g‘𝑊)
11		lsmspsn.p	. . . 4 ⊢ ⊕ = (LSSum‘𝑊)
12	10, 11	lsmelval 18064	. . 3 ⊢ (((𝑁‘{𝑋}) ∈ (SubGrp‘𝑊) ∧ (𝑁‘{𝑌}) ∈ (SubGrp‘𝑊)) → (𝑈 ∈ ((𝑁‘{𝑋}) ⊕ (𝑁‘{𝑌})) ↔ ∃𝑣 ∈ (𝑁‘{𝑋})∃𝑤 ∈ (𝑁‘{𝑌})𝑈 = (𝑣 + 𝑤)))
13	6, 9, 12	syl2anc 693	. 2 ⊢ (𝜑 → (𝑈 ∈ ((𝑁‘{𝑋}) ⊕ (𝑁‘{𝑌})) ↔ ∃𝑣 ∈ (𝑁‘{𝑋})∃𝑤 ∈ (𝑁‘{𝑌})𝑈 = (𝑣 + 𝑤)))
14		lsmspsn.f	. . . . . . . . . 10 ⊢ 𝐹 = (Scalar‘𝑊)
15		lsmspsn.k	. . . . . . . . . 10 ⊢ 𝐾 = (Base‘𝐹)
16		lsmspsn.t	. . . . . . . . . 10 ⊢ · = ( ·𝑠 ‘𝑊)
17	14, 15, 3, 16, 4	lspsnel 19003	. . . . . . . . 9 ⊢ ((𝑊 ∈ LMod ∧ 𝑋 ∈ 𝑉) → (𝑣 ∈ (𝑁‘{𝑋}) ↔ ∃𝑗 ∈ 𝐾 𝑣 = (𝑗 · 𝑋)))
18	1, 2, 17	syl2anc 693	. . . . . . . 8 ⊢ (𝜑 → (𝑣 ∈ (𝑁‘{𝑋}) ↔ ∃𝑗 ∈ 𝐾 𝑣 = (𝑗 · 𝑋)))
19	14, 15, 3, 16, 4	lspsnel 19003	. . . . . . . . 9 ⊢ ((𝑊 ∈ LMod ∧ 𝑌 ∈ 𝑉) → (𝑤 ∈ (𝑁‘{𝑌}) ↔ ∃𝑘 ∈ 𝐾 𝑤 = (𝑘 · 𝑌)))
20	1, 7, 19	syl2anc 693	. . . . . . . 8 ⊢ (𝜑 → (𝑤 ∈ (𝑁‘{𝑌}) ↔ ∃𝑘 ∈ 𝐾 𝑤 = (𝑘 · 𝑌)))
21	18, 20	anbi12d 747	. . . . . . 7 ⊢ (𝜑 → ((𝑣 ∈ (𝑁‘{𝑋}) ∧ 𝑤 ∈ (𝑁‘{𝑌})) ↔ (∃𝑗 ∈ 𝐾 𝑣 = (𝑗 · 𝑋) ∧ ∃𝑘 ∈ 𝐾 𝑤 = (𝑘 · 𝑌))))
22	21	biimpa 501	. . . . . 6 ⊢ ((𝜑 ∧ (𝑣 ∈ (𝑁‘{𝑋}) ∧ 𝑤 ∈ (𝑁‘{𝑌}))) → (∃𝑗 ∈ 𝐾 𝑣 = (𝑗 · 𝑋) ∧ ∃𝑘 ∈ 𝐾 𝑤 = (𝑘 · 𝑌)))
23	22	biantrurd 529	. . . . 5 ⊢ ((𝜑 ∧ (𝑣 ∈ (𝑁‘{𝑋}) ∧ 𝑤 ∈ (𝑁‘{𝑌}))) → (𝑈 = (𝑣 + 𝑤) ↔ ((∃𝑗 ∈ 𝐾 𝑣 = (𝑗 · 𝑋) ∧ ∃𝑘 ∈ 𝐾 𝑤 = (𝑘 · 𝑌)) ∧ 𝑈 = (𝑣 + 𝑤))))
24		r19.41v 3089	. . . . . . 7 ⊢ (∃𝑘 ∈ 𝐾 ((𝑣 = (𝑗 · 𝑋) ∧ 𝑤 = (𝑘 · 𝑌)) ∧ 𝑈 = (𝑣 + 𝑤)) ↔ (∃𝑘 ∈ 𝐾 (𝑣 = (𝑗 · 𝑋) ∧ 𝑤 = (𝑘 · 𝑌)) ∧ 𝑈 = (𝑣 + 𝑤)))
25	24	rexbii 3041	. . . . . 6 ⊢ (∃𝑗 ∈ 𝐾 ∃𝑘 ∈ 𝐾 ((𝑣 = (𝑗 · 𝑋) ∧ 𝑤 = (𝑘 · 𝑌)) ∧ 𝑈 = (𝑣 + 𝑤)) ↔ ∃𝑗 ∈ 𝐾 (∃𝑘 ∈ 𝐾 (𝑣 = (𝑗 · 𝑋) ∧ 𝑤 = (𝑘 · 𝑌)) ∧ 𝑈 = (𝑣 + 𝑤)))
26		r19.41v 3089	. . . . . 6 ⊢ (∃𝑗 ∈ 𝐾 (∃𝑘 ∈ 𝐾 (𝑣 = (𝑗 · 𝑋) ∧ 𝑤 = (𝑘 · 𝑌)) ∧ 𝑈 = (𝑣 + 𝑤)) ↔ (∃𝑗 ∈ 𝐾 ∃𝑘 ∈ 𝐾 (𝑣 = (𝑗 · 𝑋) ∧ 𝑤 = (𝑘 · 𝑌)) ∧ 𝑈 = (𝑣 + 𝑤)))
27		reeanv 3107	. . . . . . 7 ⊢ (∃𝑗 ∈ 𝐾 ∃𝑘 ∈ 𝐾 (𝑣 = (𝑗 · 𝑋) ∧ 𝑤 = (𝑘 · 𝑌)) ↔ (∃𝑗 ∈ 𝐾 𝑣 = (𝑗 · 𝑋) ∧ ∃𝑘 ∈ 𝐾 𝑤 = (𝑘 · 𝑌)))
28	27	anbi1i 731	. . . . . 6 ⊢ ((∃𝑗 ∈ 𝐾 ∃𝑘 ∈ 𝐾 (𝑣 = (𝑗 · 𝑋) ∧ 𝑤 = (𝑘 · 𝑌)) ∧ 𝑈 = (𝑣 + 𝑤)) ↔ ((∃𝑗 ∈ 𝐾 𝑣 = (𝑗 · 𝑋) ∧ ∃𝑘 ∈ 𝐾 𝑤 = (𝑘 · 𝑌)) ∧ 𝑈 = (𝑣 + 𝑤)))
29	25, 26, 28	3bitrri 287	. . . . 5 ⊢ (((∃𝑗 ∈ 𝐾 𝑣 = (𝑗 · 𝑋) ∧ ∃𝑘 ∈ 𝐾 𝑤 = (𝑘 · 𝑌)) ∧ 𝑈 = (𝑣 + 𝑤)) ↔ ∃𝑗 ∈ 𝐾 ∃𝑘 ∈ 𝐾 ((𝑣 = (𝑗 · 𝑋) ∧ 𝑤 = (𝑘 · 𝑌)) ∧ 𝑈 = (𝑣 + 𝑤)))
30	23, 29	syl6bb 276	. . . 4 ⊢ ((𝜑 ∧ (𝑣 ∈ (𝑁‘{𝑋}) ∧ 𝑤 ∈ (𝑁‘{𝑌}))) → (𝑈 = (𝑣 + 𝑤) ↔ ∃𝑗 ∈ 𝐾 ∃𝑘 ∈ 𝐾 ((𝑣 = (𝑗 · 𝑋) ∧ 𝑤 = (𝑘 · 𝑌)) ∧ 𝑈 = (𝑣 + 𝑤))))
31	30	2rexbidva 3056	. . 3 ⊢ (𝜑 → (∃𝑣 ∈ (𝑁‘{𝑋})∃𝑤 ∈ (𝑁‘{𝑌})𝑈 = (𝑣 + 𝑤) ↔ ∃𝑣 ∈ (𝑁‘{𝑋})∃𝑤 ∈ (𝑁‘{𝑌})∃𝑗 ∈ 𝐾 ∃𝑘 ∈ 𝐾 ((𝑣 = (𝑗 · 𝑋) ∧ 𝑤 = (𝑘 · 𝑌)) ∧ 𝑈 = (𝑣 + 𝑤))))
32		rexrot4 3103	. . 3 ⊢ (∃𝑣 ∈ (𝑁‘{𝑋})∃𝑤 ∈ (𝑁‘{𝑌})∃𝑗 ∈ 𝐾 ∃𝑘 ∈ 𝐾 ((𝑣 = (𝑗 · 𝑋) ∧ 𝑤 = (𝑘 · 𝑌)) ∧ 𝑈 = (𝑣 + 𝑤)) ↔ ∃𝑗 ∈ 𝐾 ∃𝑘 ∈ 𝐾 ∃𝑣 ∈ (𝑁‘{𝑋})∃𝑤 ∈ (𝑁‘{𝑌})((𝑣 = (𝑗 · 𝑋) ∧ 𝑤 = (𝑘 · 𝑌)) ∧ 𝑈 = (𝑣 + 𝑤)))
33	31, 32	syl6bb 276	. 2 ⊢ (𝜑 → (∃𝑣 ∈ (𝑁‘{𝑋})∃𝑤 ∈ (𝑁‘{𝑌})𝑈 = (𝑣 + 𝑤) ↔ ∃𝑗 ∈ 𝐾 ∃𝑘 ∈ 𝐾 ∃𝑣 ∈ (𝑁‘{𝑋})∃𝑤 ∈ (𝑁‘{𝑌})((𝑣 = (𝑗 · 𝑋) ∧ 𝑤 = (𝑘 · 𝑌)) ∧ 𝑈 = (𝑣 + 𝑤))))
34	1	adantr 481	. . . . 5 ⊢ ((𝜑 ∧ (𝑗 ∈ 𝐾 ∧ 𝑘 ∈ 𝐾)) → 𝑊 ∈ LMod)
35		simprl 794	. . . . 5 ⊢ ((𝜑 ∧ (𝑗 ∈ 𝐾 ∧ 𝑘 ∈ 𝐾)) → 𝑗 ∈ 𝐾)
36	2	adantr 481	. . . . 5 ⊢ ((𝜑 ∧ (𝑗 ∈ 𝐾 ∧ 𝑘 ∈ 𝐾)) → 𝑋 ∈ 𝑉)
37	3, 16, 14, 15, 4, 34, 35, 36	lspsneli 19001	. . . 4 ⊢ ((𝜑 ∧ (𝑗 ∈ 𝐾 ∧ 𝑘 ∈ 𝐾)) → (𝑗 · 𝑋) ∈ (𝑁‘{𝑋}))
38		simprr 796	. . . . 5 ⊢ ((𝜑 ∧ (𝑗 ∈ 𝐾 ∧ 𝑘 ∈ 𝐾)) → 𝑘 ∈ 𝐾)
39	7	adantr 481	. . . . 5 ⊢ ((𝜑 ∧ (𝑗 ∈ 𝐾 ∧ 𝑘 ∈ 𝐾)) → 𝑌 ∈ 𝑉)
40	3, 16, 14, 15, 4, 34, 38, 39	lspsneli 19001	. . . 4 ⊢ ((𝜑 ∧ (𝑗 ∈ 𝐾 ∧ 𝑘 ∈ 𝐾)) → (𝑘 · 𝑌) ∈ (𝑁‘{𝑌}))
41		oveq1 6657	. . . . . 6 ⊢ (𝑣 = (𝑗 · 𝑋) → (𝑣 + 𝑤) = ((𝑗 · 𝑋) + 𝑤))
42	41	eqeq2d 2632	. . . . 5 ⊢ (𝑣 = (𝑗 · 𝑋) → (𝑈 = (𝑣 + 𝑤) ↔ 𝑈 = ((𝑗 · 𝑋) + 𝑤)))
43		oveq2 6658	. . . . . 6 ⊢ (𝑤 = (𝑘 · 𝑌) → ((𝑗 · 𝑋) + 𝑤) = ((𝑗 · 𝑋) + (𝑘 · 𝑌)))
44	43	eqeq2d 2632	. . . . 5 ⊢ (𝑤 = (𝑘 · 𝑌) → (𝑈 = ((𝑗 · 𝑋) + 𝑤) ↔ 𝑈 = ((𝑗 · 𝑋) + (𝑘 · 𝑌))))
45	42, 44	ceqsrex2v 3338	. . . 4 ⊢ (((𝑗 · 𝑋) ∈ (𝑁‘{𝑋}) ∧ (𝑘 · 𝑌) ∈ (𝑁‘{𝑌})) → (∃𝑣 ∈ (𝑁‘{𝑋})∃𝑤 ∈ (𝑁‘{𝑌})((𝑣 = (𝑗 · 𝑋) ∧ 𝑤 = (𝑘 · 𝑌)) ∧ 𝑈 = (𝑣 + 𝑤)) ↔ 𝑈 = ((𝑗 · 𝑋) + (𝑘 · 𝑌))))
46	37, 40, 45	syl2anc 693	. . 3 ⊢ ((𝜑 ∧ (𝑗 ∈ 𝐾 ∧ 𝑘 ∈ 𝐾)) → (∃𝑣 ∈ (𝑁‘{𝑋})∃𝑤 ∈ (𝑁‘{𝑌})((𝑣 = (𝑗 · 𝑋) ∧ 𝑤 = (𝑘 · 𝑌)) ∧ 𝑈 = (𝑣 + 𝑤)) ↔ 𝑈 = ((𝑗 · 𝑋) + (𝑘 · 𝑌))))
47	46	2rexbidva 3056	. 2 ⊢ (𝜑 → (∃𝑗 ∈ 𝐾 ∃𝑘 ∈ 𝐾 ∃𝑣 ∈ (𝑁‘{𝑋})∃𝑤 ∈ (𝑁‘{𝑌})((𝑣 = (𝑗 · 𝑋) ∧ 𝑤 = (𝑘 · 𝑌)) ∧ 𝑈 = (𝑣 + 𝑤)) ↔ ∃𝑗 ∈ 𝐾 ∃𝑘 ∈ 𝐾 𝑈 = ((𝑗 · 𝑋) + (𝑘 · 𝑌))))
48	13, 33, 47	3bitrd 294	1 ⊢ (𝜑 → (𝑈 ∈ ((𝑁‘{𝑋}) ⊕ (𝑁‘{𝑌})) ↔ ∃𝑗 ∈ 𝐾 ∃𝑘 ∈ 𝐾 𝑈 = ((𝑗 · 𝑋) + (𝑘 · 𝑌))))

Syntax hints:   → wi 4   ↔ wb 196   ∧ wa 384   = wceq 1483   ∈ wcel 1990  ∃wrex 2913  {csn 4177  ‘cfv 5888  (class class class)co 6650  Basecbs 15857  +_gcplusg 15941  Scalarcsca 15944   ·_𝑠 cvsca 15945  SubGrpcsubg 17588  LSSumclsm 18049  LModclmod 18863  LSpanclspn 18971

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-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

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1038  df-3an 1039  df-tru 1486  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-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-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-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-er 7742  df-en 7956  df-dom 7957  df-sdom 7958  df-pnf 10076  df-mnf 10077  df-xr 10078  df-ltxr 10079  df-le 10080  df-sub 10268  df-neg 10269  df-nn 11021  df-2 11079  df-ndx 15860  df-slot 15861  df-base 15863  df-sets 15864  df-ress 15865  df-plusg 15954  df-0g 16102  df-mgm 17242  df-sgrp 17284  df-mnd 17295  df-grp 17425  df-minusg 17426  df-sbg 17427  df-subg 17591  df-lsm 18051  df-mgp 18490  df-ur 18502  df-ring 18549  df-lmod 18865  df-lss 18933  df-lsp 18972

This theorem is referenced by:  lsppr  19093  baerlem3lem2  36999  baerlem5alem2  37000  baerlem5blem2  37001