Theorem lsmspsn 18905

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 18801	. . . 4 ⊢ ((𝑊 ∈ LMod ∧ 𝑋 ∈ 𝑉) → (𝑁‘{𝑋}) ∈ (SubGrp‘𝑊))
6	1, 2, 5	syl2anc 691	. . 3 ⊢ (𝜑 → (𝑁‘{𝑋}) ∈ (SubGrp‘𝑊))
7		lsmspsn.y	. . . 4 ⊢ (𝜑 → 𝑌 ∈ 𝑉)
8	3, 4	lspsnsubg 18801	. . . 4 ⊢ ((𝑊 ∈ LMod ∧ 𝑌 ∈ 𝑉) → (𝑁‘{𝑌}) ∈ (SubGrp‘𝑊))
9	1, 7, 8	syl2anc 691	. . 3 ⊢ (𝜑 → (𝑁‘{𝑌}) ∈ (SubGrp‘𝑊))
10		lsmspsn.a	. . . 4 ⊢ + = (+g‘𝑊)
11		lsmspsn.p	. . . 4 ⊢ ⊕ = (LSSum‘𝑊)
12	10, 11	lsmelval 17887	. . 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 691	. 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 18824	. . . . . . . . 9 ⊢ ((𝑊 ∈ LMod ∧ 𝑋 ∈ 𝑉) → (𝑣 ∈ (𝑁‘{𝑋}) ↔ ∃𝑗 ∈ 𝐾 𝑣 = (𝑗 · 𝑋)))
18	1, 2, 17	syl2anc 691	. . . . . . . 8 ⊢ (𝜑 → (𝑣 ∈ (𝑁‘{𝑋}) ↔ ∃𝑗 ∈ 𝐾 𝑣 = (𝑗 · 𝑋)))
19	14, 15, 3, 16, 4	lspsnel 18824	. . . . . . . . 9 ⊢ ((𝑊 ∈ LMod ∧ 𝑌 ∈ 𝑉) → (𝑤 ∈ (𝑁‘{𝑌}) ↔ ∃𝑘 ∈ 𝐾 𝑤 = (𝑘 · 𝑌)))
20	1, 7, 19	syl2anc 691	. . . . . . . 8 ⊢ (𝜑 → (𝑤 ∈ (𝑁‘{𝑌}) ↔ ∃𝑘 ∈ 𝐾 𝑤 = (𝑘 · 𝑌)))
21	18, 20	anbi12d 743	. . . . . . 7 ⊢ (𝜑 → ((𝑣 ∈ (𝑁‘{𝑋}) ∧ 𝑤 ∈ (𝑁‘{𝑌})) ↔ (∃𝑗 ∈ 𝐾 𝑣 = (𝑗 · 𝑋) ∧ ∃𝑘 ∈ 𝐾 𝑤 = (𝑘 · 𝑌))))
22	21	biimpa 500	. . . . . 6 ⊢ ((𝜑 ∧ (𝑣 ∈ (𝑁‘{𝑋}) ∧ 𝑤 ∈ (𝑁‘{𝑌}))) → (∃𝑗 ∈ 𝐾 𝑣 = (𝑗 · 𝑋) ∧ ∃𝑘 ∈ 𝐾 𝑤 = (𝑘 · 𝑌)))
23	22	biantrurd 528	. . . . 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 3070	. . . . . . 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 3023	. . . . . 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 3070	. . . . . 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 3086	. . . . . . 7 ⊢ (∃𝑗 ∈ 𝐾 ∃𝑘 ∈ 𝐾 (𝑣 = (𝑗 · 𝑋) ∧ 𝑤 = (𝑘 · 𝑌)) ↔ (∃𝑗 ∈ 𝐾 𝑣 = (𝑗 · 𝑋) ∧ ∃𝑘 ∈ 𝐾 𝑤 = (𝑘 · 𝑌)))
28	27	anbi1i 727	. . . . . 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 286	. . . . 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 275	. . . 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 3038	. . 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 3082	. . 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 275	. 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 480	. . . . 5 ⊢ ((𝜑 ∧ (𝑗 ∈ 𝐾 ∧ 𝑘 ∈ 𝐾)) → 𝑊 ∈ LMod)
35		simprl 790	. . . . 5 ⊢ ((𝜑 ∧ (𝑗 ∈ 𝐾 ∧ 𝑘 ∈ 𝐾)) → 𝑗 ∈ 𝐾)
36	2	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ (𝑗 ∈ 𝐾 ∧ 𝑘 ∈ 𝐾)) → 𝑋 ∈ 𝑉)
37	3, 16, 14, 15, 4, 34, 35, 36	lspsneli 18822	. . . 4 ⊢ ((𝜑 ∧ (𝑗 ∈ 𝐾 ∧ 𝑘 ∈ 𝐾)) → (𝑗 · 𝑋) ∈ (𝑁‘{𝑋}))
38		simprr 792	. . . . 5 ⊢ ((𝜑 ∧ (𝑗 ∈ 𝐾 ∧ 𝑘 ∈ 𝐾)) → 𝑘 ∈ 𝐾)
39	7	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ (𝑗 ∈ 𝐾 ∧ 𝑘 ∈ 𝐾)) → 𝑌 ∈ 𝑉)
40	3, 16, 14, 15, 4, 34, 38, 39	lspsneli 18822	. . . 4 ⊢ ((𝜑 ∧ (𝑗 ∈ 𝐾 ∧ 𝑘 ∈ 𝐾)) → (𝑘 · 𝑌) ∈ (𝑁‘{𝑌}))
41		oveq1 6556	. . . . . 6 ⊢ (𝑣 = (𝑗 · 𝑋) → (𝑣 + 𝑤) = ((𝑗 · 𝑋) + 𝑤))
42	41	eqeq2d 2620	. . . . 5 ⊢ (𝑣 = (𝑗 · 𝑋) → (𝑈 = (𝑣 + 𝑤) ↔ 𝑈 = ((𝑗 · 𝑋) + 𝑤)))
43		oveq2 6557	. . . . . 6 ⊢ (𝑤 = (𝑘 · 𝑌) → ((𝑗 · 𝑋) + 𝑤) = ((𝑗 · 𝑋) + (𝑘 · 𝑌)))
44	43	eqeq2d 2620	. . . . 5 ⊢ (𝑤 = (𝑘 · 𝑌) → (𝑈 = ((𝑗 · 𝑋) + 𝑤) ↔ 𝑈 = ((𝑗 · 𝑋) + (𝑘 · 𝑌))))
45	42, 44	ceqsrex2v 3308	. . . 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 691	. . 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 3038	. 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 293	1 ⊢ (𝜑 → (𝑈 ∈ ((𝑁‘{𝑋}) ⊕ (𝑁‘{𝑌})) ↔ ∃𝑗 ∈ 𝐾 ∃𝑘 ∈ 𝐾 𝑈 = ((𝑗 · 𝑋) + (𝑘 · 𝑌))))

Syntax hints:   → wi 4   ↔ wb 195   ∧ wa 383   = wceq 1475   ∈ wcel 1977  ∃wrex 2897  {csn 4125  ‘cfv 5804  (class class class)co 6549  Basecbs 15695  +_gcplusg 15768  Scalarcsca 15771   ·_𝑠 cvsca 15772  SubGrpcsubg 17411  LSSumclsm 17872  LModclmod 18686  LSpanclspn 18792

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-int 4411  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-lsm 17874  df-mgp 18313  df-ur 18325  df-ring 18372  df-lmod 18688  df-lss 18754  df-lsp 18793

This theorem is referenced by:  lsppr  18914  baerlem3lem2  36017  baerlem5alem2  36018  baerlem5blem2  36019