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Theorem lsslindf 20217
 Description: Linear independence is unchanged by working in a subspace. (Contributed by Stefan O'Rear, 24-Feb-2015.) (Revised by Stefan O'Rear, 6-May-2015.)
Hypotheses
Ref Expression
lsslindf.u 𝑈 = (LSubSp‘𝑊)
lsslindf.x 𝑋 = (𝑊s 𝑆)
Assertion
Ref Expression
lsslindf ((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) → (𝐹 LIndF 𝑋𝐹 LIndF 𝑊))

Proof of Theorem lsslindf
Dummy variables 𝑘 𝑥 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 rellindf 20195 . . . 4 Rel LIndF
21brrelexi 5192 . . 3 (𝐹 LIndF 𝑋𝐹 ∈ V)
32a1i 11 . 2 ((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) → (𝐹 LIndF 𝑋𝐹 ∈ V))
41brrelexi 5192 . . 3 (𝐹 LIndF 𝑊𝐹 ∈ V)
54a1i 11 . 2 ((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) → (𝐹 LIndF 𝑊𝐹 ∈ V))
6 simpr 476 . . . . . . . 8 (((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) ∧ 𝐹:dom 𝐹⟶(Base‘𝑋)) → 𝐹:dom 𝐹⟶(Base‘𝑋))
7 lsslindf.x . . . . . . . . 9 𝑋 = (𝑊s 𝑆)
8 eqid 2651 . . . . . . . . 9 (Base‘𝑊) = (Base‘𝑊)
97, 8ressbasss 15979 . . . . . . . 8 (Base‘𝑋) ⊆ (Base‘𝑊)
10 fss 6094 . . . . . . . 8 ((𝐹:dom 𝐹⟶(Base‘𝑋) ∧ (Base‘𝑋) ⊆ (Base‘𝑊)) → 𝐹:dom 𝐹⟶(Base‘𝑊))
116, 9, 10sylancl 695 . . . . . . 7 (((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) ∧ 𝐹:dom 𝐹⟶(Base‘𝑋)) → 𝐹:dom 𝐹⟶(Base‘𝑊))
12 ffn 6083 . . . . . . . . 9 (𝐹:dom 𝐹⟶(Base‘𝑊) → 𝐹 Fn dom 𝐹)
1312adantl 481 . . . . . . . 8 (((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) ∧ 𝐹:dom 𝐹⟶(Base‘𝑊)) → 𝐹 Fn dom 𝐹)
14 simp3 1083 . . . . . . . . . 10 ((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) → ran 𝐹𝑆)
15 lsslindf.u . . . . . . . . . . . . 13 𝑈 = (LSubSp‘𝑊)
168, 15lssss 18985 . . . . . . . . . . . 12 (𝑆𝑈𝑆 ⊆ (Base‘𝑊))
17163ad2ant2 1103 . . . . . . . . . . 11 ((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) → 𝑆 ⊆ (Base‘𝑊))
187, 8ressbas2 15978 . . . . . . . . . . 11 (𝑆 ⊆ (Base‘𝑊) → 𝑆 = (Base‘𝑋))
1917, 18syl 17 . . . . . . . . . 10 ((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) → 𝑆 = (Base‘𝑋))
2014, 19sseqtrd 3674 . . . . . . . . 9 ((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) → ran 𝐹 ⊆ (Base‘𝑋))
2120adantr 480 . . . . . . . 8 (((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) ∧ 𝐹:dom 𝐹⟶(Base‘𝑊)) → ran 𝐹 ⊆ (Base‘𝑋))
22 df-f 5930 . . . . . . . 8 (𝐹:dom 𝐹⟶(Base‘𝑋) ↔ (𝐹 Fn dom 𝐹 ∧ ran 𝐹 ⊆ (Base‘𝑋)))
2313, 21, 22sylanbrc 699 . . . . . . 7 (((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) ∧ 𝐹:dom 𝐹⟶(Base‘𝑊)) → 𝐹:dom 𝐹⟶(Base‘𝑋))
2411, 23impbida 895 . . . . . 6 ((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) → (𝐹:dom 𝐹⟶(Base‘𝑋) ↔ 𝐹:dom 𝐹⟶(Base‘𝑊)))
2524adantr 480 . . . . 5 (((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) ∧ 𝐹 ∈ V) → (𝐹:dom 𝐹⟶(Base‘𝑋) ↔ 𝐹:dom 𝐹⟶(Base‘𝑊)))
26 simpl2 1085 . . . . . . . . . 10 (((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) ∧ 𝐹 ∈ V) → 𝑆𝑈)
27 eqid 2651 . . . . . . . . . . . 12 (Scalar‘𝑊) = (Scalar‘𝑊)
287, 27resssca 16078 . . . . . . . . . . 11 (𝑆𝑈 → (Scalar‘𝑊) = (Scalar‘𝑋))
2928eqcomd 2657 . . . . . . . . . 10 (𝑆𝑈 → (Scalar‘𝑋) = (Scalar‘𝑊))
3026, 29syl 17 . . . . . . . . 9 (((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) ∧ 𝐹 ∈ V) → (Scalar‘𝑋) = (Scalar‘𝑊))
3130fveq2d 6233 . . . . . . . 8 (((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) ∧ 𝐹 ∈ V) → (Base‘(Scalar‘𝑋)) = (Base‘(Scalar‘𝑊)))
3230fveq2d 6233 . . . . . . . . 9 (((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) ∧ 𝐹 ∈ V) → (0g‘(Scalar‘𝑋)) = (0g‘(Scalar‘𝑊)))
3332sneqd 4222 . . . . . . . 8 (((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) ∧ 𝐹 ∈ V) → {(0g‘(Scalar‘𝑋))} = {(0g‘(Scalar‘𝑊))})
3431, 33difeq12d 3762 . . . . . . 7 (((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) ∧ 𝐹 ∈ V) → ((Base‘(Scalar‘𝑋)) ∖ {(0g‘(Scalar‘𝑋))}) = ((Base‘(Scalar‘𝑊)) ∖ {(0g‘(Scalar‘𝑊))}))
35 eqid 2651 . . . . . . . . . . . . 13 ( ·𝑠𝑊) = ( ·𝑠𝑊)
367, 35ressvsca 16079 . . . . . . . . . . . 12 (𝑆𝑈 → ( ·𝑠𝑊) = ( ·𝑠𝑋))
3736eqcomd 2657 . . . . . . . . . . 11 (𝑆𝑈 → ( ·𝑠𝑋) = ( ·𝑠𝑊))
3826, 37syl 17 . . . . . . . . . 10 (((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) ∧ 𝐹 ∈ V) → ( ·𝑠𝑋) = ( ·𝑠𝑊))
3938oveqd 6707 . . . . . . . . 9 (((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) ∧ 𝐹 ∈ V) → (𝑘( ·𝑠𝑋)(𝐹𝑥)) = (𝑘( ·𝑠𝑊)(𝐹𝑥)))
40 simpl1 1084 . . . . . . . . . . 11 (((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) ∧ 𝐹 ∈ V) → 𝑊 ∈ LMod)
41 imassrn 5512 . . . . . . . . . . . 12 (𝐹 “ (dom 𝐹 ∖ {𝑥})) ⊆ ran 𝐹
42 simpl3 1086 . . . . . . . . . . . 12 (((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) ∧ 𝐹 ∈ V) → ran 𝐹𝑆)
4341, 42syl5ss 3647 . . . . . . . . . . 11 (((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) ∧ 𝐹 ∈ V) → (𝐹 “ (dom 𝐹 ∖ {𝑥})) ⊆ 𝑆)
44 eqid 2651 . . . . . . . . . . . 12 (LSpan‘𝑊) = (LSpan‘𝑊)
45 eqid 2651 . . . . . . . . . . . 12 (LSpan‘𝑋) = (LSpan‘𝑋)
467, 44, 45, 15lsslsp 19063 . . . . . . . . . . 11 ((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ (𝐹 “ (dom 𝐹 ∖ {𝑥})) ⊆ 𝑆) → ((LSpan‘𝑊)‘(𝐹 “ (dom 𝐹 ∖ {𝑥}))) = ((LSpan‘𝑋)‘(𝐹 “ (dom 𝐹 ∖ {𝑥}))))
4740, 26, 43, 46syl3anc 1366 . . . . . . . . . 10 (((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) ∧ 𝐹 ∈ V) → ((LSpan‘𝑊)‘(𝐹 “ (dom 𝐹 ∖ {𝑥}))) = ((LSpan‘𝑋)‘(𝐹 “ (dom 𝐹 ∖ {𝑥}))))
4847eqcomd 2657 . . . . . . . . 9 (((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) ∧ 𝐹 ∈ V) → ((LSpan‘𝑋)‘(𝐹 “ (dom 𝐹 ∖ {𝑥}))) = ((LSpan‘𝑊)‘(𝐹 “ (dom 𝐹 ∖ {𝑥}))))
4939, 48eleq12d 2724 . . . . . . . 8 (((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) ∧ 𝐹 ∈ V) → ((𝑘( ·𝑠𝑋)(𝐹𝑥)) ∈ ((LSpan‘𝑋)‘(𝐹 “ (dom 𝐹 ∖ {𝑥}))) ↔ (𝑘( ·𝑠𝑊)(𝐹𝑥)) ∈ ((LSpan‘𝑊)‘(𝐹 “ (dom 𝐹 ∖ {𝑥})))))
5049notbid 307 . . . . . . 7 (((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) ∧ 𝐹 ∈ V) → (¬ (𝑘( ·𝑠𝑋)(𝐹𝑥)) ∈ ((LSpan‘𝑋)‘(𝐹 “ (dom 𝐹 ∖ {𝑥}))) ↔ ¬ (𝑘( ·𝑠𝑊)(𝐹𝑥)) ∈ ((LSpan‘𝑊)‘(𝐹 “ (dom 𝐹 ∖ {𝑥})))))
5134, 50raleqbidv 3182 . . . . . 6 (((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) ∧ 𝐹 ∈ V) → (∀𝑘 ∈ ((Base‘(Scalar‘𝑋)) ∖ {(0g‘(Scalar‘𝑋))}) ¬ (𝑘( ·𝑠𝑋)(𝐹𝑥)) ∈ ((LSpan‘𝑋)‘(𝐹 “ (dom 𝐹 ∖ {𝑥}))) ↔ ∀𝑘 ∈ ((Base‘(Scalar‘𝑊)) ∖ {(0g‘(Scalar‘𝑊))}) ¬ (𝑘( ·𝑠𝑊)(𝐹𝑥)) ∈ ((LSpan‘𝑊)‘(𝐹 “ (dom 𝐹 ∖ {𝑥})))))
5251ralbidv 3015 . . . . 5 (((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) ∧ 𝐹 ∈ V) → (∀𝑥 ∈ dom 𝐹𝑘 ∈ ((Base‘(Scalar‘𝑋)) ∖ {(0g‘(Scalar‘𝑋))}) ¬ (𝑘( ·𝑠𝑋)(𝐹𝑥)) ∈ ((LSpan‘𝑋)‘(𝐹 “ (dom 𝐹 ∖ {𝑥}))) ↔ ∀𝑥 ∈ dom 𝐹𝑘 ∈ ((Base‘(Scalar‘𝑊)) ∖ {(0g‘(Scalar‘𝑊))}) ¬ (𝑘( ·𝑠𝑊)(𝐹𝑥)) ∈ ((LSpan‘𝑊)‘(𝐹 “ (dom 𝐹 ∖ {𝑥})))))
5325, 52anbi12d 747 . . . 4 (((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) ∧ 𝐹 ∈ V) → ((𝐹:dom 𝐹⟶(Base‘𝑋) ∧ ∀𝑥 ∈ dom 𝐹𝑘 ∈ ((Base‘(Scalar‘𝑋)) ∖ {(0g‘(Scalar‘𝑋))}) ¬ (𝑘( ·𝑠𝑋)(𝐹𝑥)) ∈ ((LSpan‘𝑋)‘(𝐹 “ (dom 𝐹 ∖ {𝑥})))) ↔ (𝐹:dom 𝐹⟶(Base‘𝑊) ∧ ∀𝑥 ∈ dom 𝐹𝑘 ∈ ((Base‘(Scalar‘𝑊)) ∖ {(0g‘(Scalar‘𝑊))}) ¬ (𝑘( ·𝑠𝑊)(𝐹𝑥)) ∈ ((LSpan‘𝑊)‘(𝐹 “ (dom 𝐹 ∖ {𝑥}))))))
54 ovex 6718 . . . . . . 7 (𝑊s 𝑆) ∈ V
557, 54eqeltri 2726 . . . . . 6 𝑋 ∈ V
5655a1i 11 . . . . 5 ((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) → 𝑋 ∈ V)
57 eqid 2651 . . . . . 6 (Base‘𝑋) = (Base‘𝑋)
58 eqid 2651 . . . . . 6 ( ·𝑠𝑋) = ( ·𝑠𝑋)
59 eqid 2651 . . . . . 6 (Scalar‘𝑋) = (Scalar‘𝑋)
60 eqid 2651 . . . . . 6 (Base‘(Scalar‘𝑋)) = (Base‘(Scalar‘𝑋))
61 eqid 2651 . . . . . 6 (0g‘(Scalar‘𝑋)) = (0g‘(Scalar‘𝑋))
6257, 58, 45, 59, 60, 61islindf 20199 . . . . 5 ((𝑋 ∈ V ∧ 𝐹 ∈ V) → (𝐹 LIndF 𝑋 ↔ (𝐹:dom 𝐹⟶(Base‘𝑋) ∧ ∀𝑥 ∈ dom 𝐹𝑘 ∈ ((Base‘(Scalar‘𝑋)) ∖ {(0g‘(Scalar‘𝑋))}) ¬ (𝑘( ·𝑠𝑋)(𝐹𝑥)) ∈ ((LSpan‘𝑋)‘(𝐹 “ (dom 𝐹 ∖ {𝑥}))))))
6356, 62sylan 487 . . . 4 (((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) ∧ 𝐹 ∈ V) → (𝐹 LIndF 𝑋 ↔ (𝐹:dom 𝐹⟶(Base‘𝑋) ∧ ∀𝑥 ∈ dom 𝐹𝑘 ∈ ((Base‘(Scalar‘𝑋)) ∖ {(0g‘(Scalar‘𝑋))}) ¬ (𝑘( ·𝑠𝑋)(𝐹𝑥)) ∈ ((LSpan‘𝑋)‘(𝐹 “ (dom 𝐹 ∖ {𝑥}))))))
64 eqid 2651 . . . . . 6 (Base‘(Scalar‘𝑊)) = (Base‘(Scalar‘𝑊))
65 eqid 2651 . . . . . 6 (0g‘(Scalar‘𝑊)) = (0g‘(Scalar‘𝑊))
668, 35, 44, 27, 64, 65islindf 20199 . . . . 5 ((𝑊 ∈ LMod ∧ 𝐹 ∈ V) → (𝐹 LIndF 𝑊 ↔ (𝐹:dom 𝐹⟶(Base‘𝑊) ∧ ∀𝑥 ∈ dom 𝐹𝑘 ∈ ((Base‘(Scalar‘𝑊)) ∖ {(0g‘(Scalar‘𝑊))}) ¬ (𝑘( ·𝑠𝑊)(𝐹𝑥)) ∈ ((LSpan‘𝑊)‘(𝐹 “ (dom 𝐹 ∖ {𝑥}))))))
67663ad2antl1 1243 . . . 4 (((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) ∧ 𝐹 ∈ V) → (𝐹 LIndF 𝑊 ↔ (𝐹:dom 𝐹⟶(Base‘𝑊) ∧ ∀𝑥 ∈ dom 𝐹𝑘 ∈ ((Base‘(Scalar‘𝑊)) ∖ {(0g‘(Scalar‘𝑊))}) ¬ (𝑘( ·𝑠𝑊)(𝐹𝑥)) ∈ ((LSpan‘𝑊)‘(𝐹 “ (dom 𝐹 ∖ {𝑥}))))))
6853, 63, 673bitr4d 300 . . 3 (((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) ∧ 𝐹 ∈ V) → (𝐹 LIndF 𝑋𝐹 LIndF 𝑊))
6968ex 449 . 2 ((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) → (𝐹 ∈ V → (𝐹 LIndF 𝑋𝐹 LIndF 𝑊)))
703, 5, 69pm5.21ndd 368 1 ((𝑊 ∈ LMod ∧ 𝑆𝑈 ∧ ran 𝐹𝑆) → (𝐹 LIndF 𝑋𝐹 LIndF 𝑊))
 Colors of variables: wff setvar class Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 196   ∧ wa 383   ∧ w3a 1054   = wceq 1523   ∈ wcel 2030  ∀wral 2941  Vcvv 3231   ∖ cdif 3604   ⊆ wss 3607  {csn 4210   class class class wbr 4685  dom cdm 5143  ran crn 5144   “ cima 5146   Fn wfn 5921  ⟶wf 5922  ‘cfv 5926  (class class class)co 6690  Basecbs 15904   ↾s cress 15905  Scalarcsca 15991   ·𝑠 cvsca 15992  0gc0g 16147  LModclmod 18911  LSubSpclss 18980  LSpanclspn 19019   LIndF clindf 20191 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1762  ax-4 1777  ax-5 1879  ax-6 1945  ax-7 1981  ax-8 2032  ax-9 2039  ax-10 2059  ax-11 2074  ax-12 2087  ax-13 2282  ax-ext 2631  ax-rep 4804  ax-sep 4814  ax-nul 4822  ax-pow 4873  ax-pr 4936  ax-un 6991  ax-cnex 10030  ax-resscn 10031  ax-1cn 10032  ax-icn 10033  ax-addcl 10034  ax-addrcl 10035  ax-mulcl 10036  ax-mulrcl 10037  ax-mulcom 10038  ax-addass 10039  ax-mulass 10040  ax-distr 10041  ax-i2m1 10042  ax-1ne0 10043  ax-1rid 10044  ax-rnegex 10045  ax-rrecex 10046  ax-cnre 10047  ax-pre-lttri 10048  ax-pre-lttrn 10049  ax-pre-ltadd 10050  ax-pre-mulgt0 10051 This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3or 1055  df-3an 1056  df-tru 1526  df-ex 1745  df-nf 1750  df-sb 1938  df-eu 2502  df-mo 2503  df-clab 2638  df-cleq 2644  df-clel 2647  df-nfc 2782  df-ne 2824  df-nel 2927  df-ral 2946  df-rex 2947  df-reu 2948  df-rmo 2949  df-rab 2950  df-v 3233  df-sbc 3469  df-csb 3567  df-dif 3610  df-un 3612  df-in 3614  df-ss 3621  df-pss 3623  df-nul 3949  df-if 4120  df-pw 4193  df-sn 4211  df-pr 4213  df-tp 4215  df-op 4217  df-uni 4469  df-int 4508  df-iun 4554  df-br 4686  df-opab 4746  df-mpt 4763  df-tr 4786  df-id 5053  df-eprel 5058  df-po 5064  df-so 5065  df-fr 5102  df-we 5104  df-xp 5149  df-rel 5150  df-cnv 5151  df-co 5152  df-dm 5153  df-rn 5154  df-res 5155  df-ima 5156  df-pred 5718  df-ord 5764  df-on 5765  df-lim 5766  df-suc 5767  df-iota 5889  df-fun 5928  df-fn 5929  df-f 5930  df-f1 5931  df-fo 5932  df-f1o 5933  df-fv 5934  df-riota 6651  df-ov 6693  df-oprab 6694  df-mpt2 6695  df-om 7108  df-1st 7210  df-2nd 7211  df-wrecs 7452  df-recs 7513  df-rdg 7551  df-er 7787  df-en 7998  df-dom 7999  df-sdom 8000  df-pnf 10114  df-mnf 10115  df-xr 10116  df-ltxr 10117  df-le 10118  df-sub 10306  df-neg 10307  df-nn 11059  df-2 11117  df-3 11118  df-4 11119  df-5 11120  df-6 11121  df-ndx 15907  df-slot 15908  df-base 15910  df-sets 15911  df-ress 15912  df-plusg 16001  df-sca 16004  df-vsca 16005  df-0g 16149  df-mgm 17289  df-sgrp 17331  df-mnd 17342  df-grp 17472  df-minusg 17473  df-sbg 17474  df-subg 17638  df-mgp 18536  df-ur 18548  df-ring 18595  df-lmod 18913  df-lss 18981  df-lsp 19020  df-lindf 20193 This theorem is referenced by:  lsslinds  20218
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