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Theorem lindfind 20074
Description: A linearly independent family is independent: no nonzero element multiple can be expressed as a linear combination of the others. (Contributed by Stefan O'Rear, 24-Feb-2015.)
Hypotheses
Ref Expression
lindfind.s · = ( ·𝑠𝑊)
lindfind.n 𝑁 = (LSpan‘𝑊)
lindfind.l 𝐿 = (Scalar‘𝑊)
lindfind.z 0 = (0g𝐿)
lindfind.k 𝐾 = (Base‘𝐿)
Assertion
Ref Expression
lindfind (((𝐹 LIndF 𝑊𝐸 ∈ dom 𝐹) ∧ (𝐴𝐾𝐴0 )) → ¬ (𝐴 · (𝐹𝐸)) ∈ (𝑁‘(𝐹 “ (dom 𝐹 ∖ {𝐸}))))

Proof of Theorem lindfind
Dummy variables 𝑎 𝑒 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 simplr 791 . 2 (((𝐹 LIndF 𝑊𝐸 ∈ dom 𝐹) ∧ (𝐴𝐾𝐴0 )) → 𝐸 ∈ dom 𝐹)
2 eldifsn 4287 . . . 4 (𝐴 ∈ (𝐾 ∖ { 0 }) ↔ (𝐴𝐾𝐴0 ))
32biimpri 218 . . 3 ((𝐴𝐾𝐴0 ) → 𝐴 ∈ (𝐾 ∖ { 0 }))
43adantl 482 . 2 (((𝐹 LIndF 𝑊𝐸 ∈ dom 𝐹) ∧ (𝐴𝐾𝐴0 )) → 𝐴 ∈ (𝐾 ∖ { 0 }))
5 simpll 789 . . . 4 (((𝐹 LIndF 𝑊𝐸 ∈ dom 𝐹) ∧ (𝐴𝐾𝐴0 )) → 𝐹 LIndF 𝑊)
6 lindfind.l . . . . . . 7 𝐿 = (Scalar‘𝑊)
7 lindfind.k . . . . . . 7 𝐾 = (Base‘𝐿)
86, 7elbasfv 15841 . . . . . 6 (𝐴𝐾𝑊 ∈ V)
98ad2antrl 763 . . . . 5 (((𝐹 LIndF 𝑊𝐸 ∈ dom 𝐹) ∧ (𝐴𝐾𝐴0 )) → 𝑊 ∈ V)
10 rellindf 20066 . . . . . . 7 Rel LIndF
1110brrelexi 5118 . . . . . 6 (𝐹 LIndF 𝑊𝐹 ∈ V)
1211ad2antrr 761 . . . . 5 (((𝐹 LIndF 𝑊𝐸 ∈ dom 𝐹) ∧ (𝐴𝐾𝐴0 )) → 𝐹 ∈ V)
13 eqid 2621 . . . . . 6 (Base‘𝑊) = (Base‘𝑊)
14 lindfind.s . . . . . 6 · = ( ·𝑠𝑊)
15 lindfind.n . . . . . 6 𝑁 = (LSpan‘𝑊)
16 lindfind.z . . . . . 6 0 = (0g𝐿)
1713, 14, 15, 6, 7, 16islindf 20070 . . . . 5 ((𝑊 ∈ V ∧ 𝐹 ∈ V) → (𝐹 LIndF 𝑊 ↔ (𝐹:dom 𝐹⟶(Base‘𝑊) ∧ ∀𝑒 ∈ dom 𝐹𝑎 ∈ (𝐾 ∖ { 0 }) ¬ (𝑎 · (𝐹𝑒)) ∈ (𝑁‘(𝐹 “ (dom 𝐹 ∖ {𝑒}))))))
189, 12, 17syl2anc 692 . . . 4 (((𝐹 LIndF 𝑊𝐸 ∈ dom 𝐹) ∧ (𝐴𝐾𝐴0 )) → (𝐹 LIndF 𝑊 ↔ (𝐹:dom 𝐹⟶(Base‘𝑊) ∧ ∀𝑒 ∈ dom 𝐹𝑎 ∈ (𝐾 ∖ { 0 }) ¬ (𝑎 · (𝐹𝑒)) ∈ (𝑁‘(𝐹 “ (dom 𝐹 ∖ {𝑒}))))))
195, 18mpbid 222 . . 3 (((𝐹 LIndF 𝑊𝐸 ∈ dom 𝐹) ∧ (𝐴𝐾𝐴0 )) → (𝐹:dom 𝐹⟶(Base‘𝑊) ∧ ∀𝑒 ∈ dom 𝐹𝑎 ∈ (𝐾 ∖ { 0 }) ¬ (𝑎 · (𝐹𝑒)) ∈ (𝑁‘(𝐹 “ (dom 𝐹 ∖ {𝑒})))))
2019simprd 479 . 2 (((𝐹 LIndF 𝑊𝐸 ∈ dom 𝐹) ∧ (𝐴𝐾𝐴0 )) → ∀𝑒 ∈ dom 𝐹𝑎 ∈ (𝐾 ∖ { 0 }) ¬ (𝑎 · (𝐹𝑒)) ∈ (𝑁‘(𝐹 “ (dom 𝐹 ∖ {𝑒}))))
21 fveq2 6148 . . . . . 6 (𝑒 = 𝐸 → (𝐹𝑒) = (𝐹𝐸))
2221oveq2d 6620 . . . . 5 (𝑒 = 𝐸 → (𝑎 · (𝐹𝑒)) = (𝑎 · (𝐹𝐸)))
23 sneq 4158 . . . . . . . 8 (𝑒 = 𝐸 → {𝑒} = {𝐸})
2423difeq2d 3706 . . . . . . 7 (𝑒 = 𝐸 → (dom 𝐹 ∖ {𝑒}) = (dom 𝐹 ∖ {𝐸}))
2524imaeq2d 5425 . . . . . 6 (𝑒 = 𝐸 → (𝐹 “ (dom 𝐹 ∖ {𝑒})) = (𝐹 “ (dom 𝐹 ∖ {𝐸})))
2625fveq2d 6152 . . . . 5 (𝑒 = 𝐸 → (𝑁‘(𝐹 “ (dom 𝐹 ∖ {𝑒}))) = (𝑁‘(𝐹 “ (dom 𝐹 ∖ {𝐸}))))
2722, 26eleq12d 2692 . . . 4 (𝑒 = 𝐸 → ((𝑎 · (𝐹𝑒)) ∈ (𝑁‘(𝐹 “ (dom 𝐹 ∖ {𝑒}))) ↔ (𝑎 · (𝐹𝐸)) ∈ (𝑁‘(𝐹 “ (dom 𝐹 ∖ {𝐸})))))
2827notbid 308 . . 3 (𝑒 = 𝐸 → (¬ (𝑎 · (𝐹𝑒)) ∈ (𝑁‘(𝐹 “ (dom 𝐹 ∖ {𝑒}))) ↔ ¬ (𝑎 · (𝐹𝐸)) ∈ (𝑁‘(𝐹 “ (dom 𝐹 ∖ {𝐸})))))
29 oveq1 6611 . . . . 5 (𝑎 = 𝐴 → (𝑎 · (𝐹𝐸)) = (𝐴 · (𝐹𝐸)))
3029eleq1d 2683 . . . 4 (𝑎 = 𝐴 → ((𝑎 · (𝐹𝐸)) ∈ (𝑁‘(𝐹 “ (dom 𝐹 ∖ {𝐸}))) ↔ (𝐴 · (𝐹𝐸)) ∈ (𝑁‘(𝐹 “ (dom 𝐹 ∖ {𝐸})))))
3130notbid 308 . . 3 (𝑎 = 𝐴 → (¬ (𝑎 · (𝐹𝐸)) ∈ (𝑁‘(𝐹 “ (dom 𝐹 ∖ {𝐸}))) ↔ ¬ (𝐴 · (𝐹𝐸)) ∈ (𝑁‘(𝐹 “ (dom 𝐹 ∖ {𝐸})))))
3228, 31rspc2va 3307 . 2 (((𝐸 ∈ dom 𝐹𝐴 ∈ (𝐾 ∖ { 0 })) ∧ ∀𝑒 ∈ dom 𝐹𝑎 ∈ (𝐾 ∖ { 0 }) ¬ (𝑎 · (𝐹𝑒)) ∈ (𝑁‘(𝐹 “ (dom 𝐹 ∖ {𝑒})))) → ¬ (𝐴 · (𝐹𝐸)) ∈ (𝑁‘(𝐹 “ (dom 𝐹 ∖ {𝐸}))))
331, 4, 20, 32syl21anc 1322 1 (((𝐹 LIndF 𝑊𝐸 ∈ dom 𝐹) ∧ (𝐴𝐾𝐴0 )) → ¬ (𝐴 · (𝐹𝐸)) ∈ (𝑁‘(𝐹 “ (dom 𝐹 ∖ {𝐸}))))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 196  wa 384   = wceq 1480  wcel 1987  wne 2790  wral 2907  Vcvv 3186  cdif 3552  {csn 4148   class class class wbr 4613  dom cdm 5074  cima 5077  wf 5843  cfv 5847  (class class class)co 6604  Basecbs 15781  Scalarcsca 15865   ·𝑠 cvsca 15866  0gc0g 16021  LSpanclspn 18890   LIndF clindf 20062
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1719  ax-4 1734  ax-5 1836  ax-6 1885  ax-7 1932  ax-8 1989  ax-9 1996  ax-10 2016  ax-11 2031  ax-12 2044  ax-13 2245  ax-ext 2601  ax-sep 4741  ax-nul 4749  ax-pow 4803  ax-pr 4867
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1038  df-tru 1483  df-ex 1702  df-nf 1707  df-sb 1878  df-eu 2473  df-mo 2474  df-clab 2608  df-cleq 2614  df-clel 2617  df-nfc 2750  df-ne 2791  df-ral 2912  df-rex 2913  df-rab 2916  df-v 3188  df-sbc 3418  df-dif 3558  df-un 3560  df-in 3562  df-ss 3569  df-nul 3892  df-if 4059  df-sn 4149  df-pr 4151  df-op 4155  df-uni 4403  df-br 4614  df-opab 4674  df-mpt 4675  df-id 4989  df-xp 5080  df-rel 5081  df-cnv 5082  df-co 5083  df-dm 5084  df-rn 5085  df-res 5086  df-ima 5087  df-iota 5810  df-fun 5849  df-fn 5850  df-f 5851  df-fv 5855  df-ov 6607  df-slot 15785  df-base 15786  df-lindf 20064
This theorem is referenced by:  lindfind2  20076  lindfrn  20079  f1lindf  20080
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