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Theorem lbsind 19171
 Description: A basis is linearly independent; that is, every element has a span which trivially intersects the span of the remainder of the basis. (Contributed by Mario Carneiro, 12-Jan-2015.)
Hypotheses
Ref Expression
lbsss.v 𝑉 = (Base‘𝑊)
lbsss.j 𝐽 = (LBasis‘𝑊)
lbssp.n 𝑁 = (LSpan‘𝑊)
lbsind.f 𝐹 = (Scalar‘𝑊)
lbsind.s · = ( ·𝑠𝑊)
lbsind.k 𝐾 = (Base‘𝐹)
lbsind.z 0 = (0g𝐹)
Assertion
Ref Expression
lbsind (((𝐵𝐽𝐸𝐵) ∧ (𝐴𝐾𝐴0 )) → ¬ (𝐴 · 𝐸) ∈ (𝑁‘(𝐵 ∖ {𝐸})))

Proof of Theorem lbsind
Dummy variables 𝑦 𝑥 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 eldifsn 4393 . 2 (𝐴 ∈ (𝐾 ∖ { 0 }) ↔ (𝐴𝐾𝐴0 ))
2 elfvdm 6301 . . . . . . . 8 (𝐵 ∈ (LBasis‘𝑊) → 𝑊 ∈ dom LBasis)
3 lbsss.j . . . . . . . 8 𝐽 = (LBasis‘𝑊)
42, 3eleq2s 2789 . . . . . . 7 (𝐵𝐽𝑊 ∈ dom LBasis)
5 lbsss.v . . . . . . . 8 𝑉 = (Base‘𝑊)
6 lbsind.f . . . . . . . 8 𝐹 = (Scalar‘𝑊)
7 lbsind.s . . . . . . . 8 · = ( ·𝑠𝑊)
8 lbsind.k . . . . . . . 8 𝐾 = (Base‘𝐹)
9 lbssp.n . . . . . . . 8 𝑁 = (LSpan‘𝑊)
10 lbsind.z . . . . . . . 8 0 = (0g𝐹)
115, 6, 7, 8, 3, 9, 10islbs 19167 . . . . . . 7 (𝑊 ∈ dom LBasis → (𝐵𝐽 ↔ (𝐵𝑉 ∧ (𝑁𝐵) = 𝑉 ∧ ∀𝑥𝐵𝑦 ∈ (𝐾 ∖ { 0 }) ¬ (𝑦 · 𝑥) ∈ (𝑁‘(𝐵 ∖ {𝑥})))))
124, 11syl 17 . . . . . 6 (𝐵𝐽 → (𝐵𝐽 ↔ (𝐵𝑉 ∧ (𝑁𝐵) = 𝑉 ∧ ∀𝑥𝐵𝑦 ∈ (𝐾 ∖ { 0 }) ¬ (𝑦 · 𝑥) ∈ (𝑁‘(𝐵 ∖ {𝑥})))))
1312ibi 256 . . . . 5 (𝐵𝐽 → (𝐵𝑉 ∧ (𝑁𝐵) = 𝑉 ∧ ∀𝑥𝐵𝑦 ∈ (𝐾 ∖ { 0 }) ¬ (𝑦 · 𝑥) ∈ (𝑁‘(𝐵 ∖ {𝑥}))))
1413simp3d 1136 . . . 4 (𝐵𝐽 → ∀𝑥𝐵𝑦 ∈ (𝐾 ∖ { 0 }) ¬ (𝑦 · 𝑥) ∈ (𝑁‘(𝐵 ∖ {𝑥})))
15 oveq2 6741 . . . . . . 7 (𝑥 = 𝐸 → (𝑦 · 𝑥) = (𝑦 · 𝐸))
16 sneq 4263 . . . . . . . . 9 (𝑥 = 𝐸 → {𝑥} = {𝐸})
1716difeq2d 3804 . . . . . . . 8 (𝑥 = 𝐸 → (𝐵 ∖ {𝑥}) = (𝐵 ∖ {𝐸}))
1817fveq2d 6276 . . . . . . 7 (𝑥 = 𝐸 → (𝑁‘(𝐵 ∖ {𝑥})) = (𝑁‘(𝐵 ∖ {𝐸})))
1915, 18eleq12d 2765 . . . . . 6 (𝑥 = 𝐸 → ((𝑦 · 𝑥) ∈ (𝑁‘(𝐵 ∖ {𝑥})) ↔ (𝑦 · 𝐸) ∈ (𝑁‘(𝐵 ∖ {𝐸}))))
2019notbid 307 . . . . 5 (𝑥 = 𝐸 → (¬ (𝑦 · 𝑥) ∈ (𝑁‘(𝐵 ∖ {𝑥})) ↔ ¬ (𝑦 · 𝐸) ∈ (𝑁‘(𝐵 ∖ {𝐸}))))
21 oveq1 6740 . . . . . . 7 (𝑦 = 𝐴 → (𝑦 · 𝐸) = (𝐴 · 𝐸))
2221eleq1d 2756 . . . . . 6 (𝑦 = 𝐴 → ((𝑦 · 𝐸) ∈ (𝑁‘(𝐵 ∖ {𝐸})) ↔ (𝐴 · 𝐸) ∈ (𝑁‘(𝐵 ∖ {𝐸}))))
2322notbid 307 . . . . 5 (𝑦 = 𝐴 → (¬ (𝑦 · 𝐸) ∈ (𝑁‘(𝐵 ∖ {𝐸})) ↔ ¬ (𝐴 · 𝐸) ∈ (𝑁‘(𝐵 ∖ {𝐸}))))
2420, 23rspc2v 3394 . . . 4 ((𝐸𝐵𝐴 ∈ (𝐾 ∖ { 0 })) → (∀𝑥𝐵𝑦 ∈ (𝐾 ∖ { 0 }) ¬ (𝑦 · 𝑥) ∈ (𝑁‘(𝐵 ∖ {𝑥})) → ¬ (𝐴 · 𝐸) ∈ (𝑁‘(𝐵 ∖ {𝐸}))))
2514, 24syl5com 31 . . 3 (𝐵𝐽 → ((𝐸𝐵𝐴 ∈ (𝐾 ∖ { 0 })) → ¬ (𝐴 · 𝐸) ∈ (𝑁‘(𝐵 ∖ {𝐸}))))
2625impl 651 . 2 (((𝐵𝐽𝐸𝐵) ∧ 𝐴 ∈ (𝐾 ∖ { 0 })) → ¬ (𝐴 · 𝐸) ∈ (𝑁‘(𝐵 ∖ {𝐸})))
271, 26sylan2br 494 1 (((𝐵𝐽𝐸𝐵) ∧ (𝐴𝐾𝐴0 )) → ¬ (𝐴 · 𝐸) ∈ (𝑁‘(𝐵 ∖ {𝐸})))
 Colors of variables: wff setvar class Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 196   ∧ wa 383   ∧ w3a 1072   = wceq 1564   ∈ wcel 2071   ≠ wne 2864  ∀wral 2982   ∖ cdif 3645   ⊆ wss 3648  {csn 4253  dom cdm 5186  ‘cfv 5969  (class class class)co 6733  Basecbs 15948  Scalarcsca 16035   ·𝑠 cvsca 16036  0gc0g 16191  LSpanclspn 19062  LBasisclbs 19165 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1803  ax-4 1818  ax-5 1920  ax-6 1986  ax-7 2022  ax-8 2073  ax-9 2080  ax-10 2100  ax-11 2115  ax-12 2128  ax-13 2323  ax-ext 2672  ax-sep 4857  ax-nul 4865  ax-pow 4916  ax-pr 4979 This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3an 1074  df-tru 1567  df-ex 1786  df-nf 1791  df-sb 1979  df-eu 2543  df-mo 2544  df-clab 2679  df-cleq 2685  df-clel 2688  df-nfc 2823  df-ne 2865  df-ral 2987  df-rex 2988  df-rab 2991  df-v 3274  df-sbc 3510  df-dif 3651  df-un 3653  df-in 3655  df-ss 3662  df-nul 3992  df-if 4163  df-pw 4236  df-sn 4254  df-pr 4256  df-op 4260  df-uni 4513  df-br 4729  df-opab 4789  df-mpt 4806  df-id 5096  df-xp 5192  df-rel 5193  df-cnv 5194  df-co 5195  df-dm 5196  df-iota 5932  df-fun 5971  df-fv 5977  df-ov 6736  df-lbs 19166 This theorem is referenced by:  lbsind2  19172
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