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Theorem islindf 20774
Description: Property of an independent family of vectors. (Contributed by Stefan O'Rear, 24-Feb-2015.)
Hypotheses
Ref Expression
islindf.b 𝐵 = (Base‘𝑊)
islindf.v · = ( ·𝑠𝑊)
islindf.k 𝐾 = (LSpan‘𝑊)
islindf.s 𝑆 = (Scalar‘𝑊)
islindf.n 𝑁 = (Base‘𝑆)
islindf.z 0 = (0g𝑆)
Assertion
Ref Expression
islindf ((𝑊𝑌𝐹𝑋) → (𝐹 LIndF 𝑊 ↔ (𝐹:dom 𝐹𝐵 ∧ ∀𝑥 ∈ dom 𝐹𝑘 ∈ (𝑁 ∖ { 0 }) ¬ (𝑘 · (𝐹𝑥)) ∈ (𝐾‘(𝐹 “ (dom 𝐹 ∖ {𝑥}))))))
Distinct variable groups:   𝑘,𝐹,𝑥   𝑘,𝑁   𝑘,𝑊,𝑥   0 ,𝑘
Allowed substitution hints:   𝐵(𝑥,𝑘)   𝑆(𝑥,𝑘)   · (𝑥,𝑘)   𝐾(𝑥,𝑘)   𝑁(𝑥)   𝑋(𝑥,𝑘)   𝑌(𝑥,𝑘)   0 (𝑥)

Proof of Theorem islindf
Dummy variables 𝑓 𝑤 𝑠 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 feq1 6526 . . . . . 6 (𝑓 = 𝐹 → (𝑓:dom 𝑓⟶(Base‘𝑤) ↔ 𝐹:dom 𝑓⟶(Base‘𝑤)))
21adantr 484 . . . . 5 ((𝑓 = 𝐹𝑤 = 𝑊) → (𝑓:dom 𝑓⟶(Base‘𝑤) ↔ 𝐹:dom 𝑓⟶(Base‘𝑤)))
3 dmeq 5772 . . . . . . 7 (𝑓 = 𝐹 → dom 𝑓 = dom 𝐹)
43adantr 484 . . . . . 6 ((𝑓 = 𝐹𝑤 = 𝑊) → dom 𝑓 = dom 𝐹)
5 fveq2 6717 . . . . . . . 8 (𝑤 = 𝑊 → (Base‘𝑤) = (Base‘𝑊))
6 islindf.b . . . . . . . 8 𝐵 = (Base‘𝑊)
75, 6eqtr4di 2796 . . . . . . 7 (𝑤 = 𝑊 → (Base‘𝑤) = 𝐵)
87adantl 485 . . . . . 6 ((𝑓 = 𝐹𝑤 = 𝑊) → (Base‘𝑤) = 𝐵)
94, 8feq23d 6540 . . . . 5 ((𝑓 = 𝐹𝑤 = 𝑊) → (𝐹:dom 𝑓⟶(Base‘𝑤) ↔ 𝐹:dom 𝐹𝐵))
102, 9bitrd 282 . . . 4 ((𝑓 = 𝐹𝑤 = 𝑊) → (𝑓:dom 𝑓⟶(Base‘𝑤) ↔ 𝐹:dom 𝐹𝐵))
11 fvex 6730 . . . . . 6 (Scalar‘𝑤) ∈ V
12 fveq2 6717 . . . . . . . . 9 (𝑠 = (Scalar‘𝑤) → (Base‘𝑠) = (Base‘(Scalar‘𝑤)))
13 fveq2 6717 . . . . . . . . . 10 (𝑠 = (Scalar‘𝑤) → (0g𝑠) = (0g‘(Scalar‘𝑤)))
1413sneqd 4553 . . . . . . . . 9 (𝑠 = (Scalar‘𝑤) → {(0g𝑠)} = {(0g‘(Scalar‘𝑤))})
1512, 14difeq12d 4038 . . . . . . . 8 (𝑠 = (Scalar‘𝑤) → ((Base‘𝑠) ∖ {(0g𝑠)}) = ((Base‘(Scalar‘𝑤)) ∖ {(0g‘(Scalar‘𝑤))}))
1615raleqdv 3325 . . . . . . 7 (𝑠 = (Scalar‘𝑤) → (∀𝑘 ∈ ((Base‘𝑠) ∖ {(0g𝑠)}) ¬ (𝑘( ·𝑠𝑤)(𝑓𝑥)) ∈ ((LSpan‘𝑤)‘(𝑓 “ (dom 𝑓 ∖ {𝑥}))) ↔ ∀𝑘 ∈ ((Base‘(Scalar‘𝑤)) ∖ {(0g‘(Scalar‘𝑤))}) ¬ (𝑘( ·𝑠𝑤)(𝑓𝑥)) ∈ ((LSpan‘𝑤)‘(𝑓 “ (dom 𝑓 ∖ {𝑥})))))
1716ralbidv 3118 . . . . . 6 (𝑠 = (Scalar‘𝑤) → (∀𝑥 ∈ dom 𝑓𝑘 ∈ ((Base‘𝑠) ∖ {(0g𝑠)}) ¬ (𝑘( ·𝑠𝑤)(𝑓𝑥)) ∈ ((LSpan‘𝑤)‘(𝑓 “ (dom 𝑓 ∖ {𝑥}))) ↔ ∀𝑥 ∈ dom 𝑓𝑘 ∈ ((Base‘(Scalar‘𝑤)) ∖ {(0g‘(Scalar‘𝑤))}) ¬ (𝑘( ·𝑠𝑤)(𝑓𝑥)) ∈ ((LSpan‘𝑤)‘(𝑓 “ (dom 𝑓 ∖ {𝑥})))))
1811, 17sbcie 3737 . . . . 5 ([(Scalar‘𝑤) / 𝑠]𝑥 ∈ dom 𝑓𝑘 ∈ ((Base‘𝑠) ∖ {(0g𝑠)}) ¬ (𝑘( ·𝑠𝑤)(𝑓𝑥)) ∈ ((LSpan‘𝑤)‘(𝑓 “ (dom 𝑓 ∖ {𝑥}))) ↔ ∀𝑥 ∈ dom 𝑓𝑘 ∈ ((Base‘(Scalar‘𝑤)) ∖ {(0g‘(Scalar‘𝑤))}) ¬ (𝑘( ·𝑠𝑤)(𝑓𝑥)) ∈ ((LSpan‘𝑤)‘(𝑓 “ (dom 𝑓 ∖ {𝑥}))))
19 fveq2 6717 . . . . . . . . . . . 12 (𝑤 = 𝑊 → (Scalar‘𝑤) = (Scalar‘𝑊))
20 islindf.s . . . . . . . . . . . 12 𝑆 = (Scalar‘𝑊)
2119, 20eqtr4di 2796 . . . . . . . . . . 11 (𝑤 = 𝑊 → (Scalar‘𝑤) = 𝑆)
2221fveq2d 6721 . . . . . . . . . 10 (𝑤 = 𝑊 → (Base‘(Scalar‘𝑤)) = (Base‘𝑆))
23 islindf.n . . . . . . . . . 10 𝑁 = (Base‘𝑆)
2422, 23eqtr4di 2796 . . . . . . . . 9 (𝑤 = 𝑊 → (Base‘(Scalar‘𝑤)) = 𝑁)
2521fveq2d 6721 . . . . . . . . . . 11 (𝑤 = 𝑊 → (0g‘(Scalar‘𝑤)) = (0g𝑆))
26 islindf.z . . . . . . . . . . 11 0 = (0g𝑆)
2725, 26eqtr4di 2796 . . . . . . . . . 10 (𝑤 = 𝑊 → (0g‘(Scalar‘𝑤)) = 0 )
2827sneqd 4553 . . . . . . . . 9 (𝑤 = 𝑊 → {(0g‘(Scalar‘𝑤))} = { 0 })
2924, 28difeq12d 4038 . . . . . . . 8 (𝑤 = 𝑊 → ((Base‘(Scalar‘𝑤)) ∖ {(0g‘(Scalar‘𝑤))}) = (𝑁 ∖ { 0 }))
3029adantl 485 . . . . . . 7 ((𝑓 = 𝐹𝑤 = 𝑊) → ((Base‘(Scalar‘𝑤)) ∖ {(0g‘(Scalar‘𝑤))}) = (𝑁 ∖ { 0 }))
31 fveq2 6717 . . . . . . . . . . . 12 (𝑤 = 𝑊 → ( ·𝑠𝑤) = ( ·𝑠𝑊))
32 islindf.v . . . . . . . . . . . 12 · = ( ·𝑠𝑊)
3331, 32eqtr4di 2796 . . . . . . . . . . 11 (𝑤 = 𝑊 → ( ·𝑠𝑤) = · )
3433adantl 485 . . . . . . . . . 10 ((𝑓 = 𝐹𝑤 = 𝑊) → ( ·𝑠𝑤) = · )
35 eqidd 2738 . . . . . . . . . 10 ((𝑓 = 𝐹𝑤 = 𝑊) → 𝑘 = 𝑘)
36 fveq1 6716 . . . . . . . . . . 11 (𝑓 = 𝐹 → (𝑓𝑥) = (𝐹𝑥))
3736adantr 484 . . . . . . . . . 10 ((𝑓 = 𝐹𝑤 = 𝑊) → (𝑓𝑥) = (𝐹𝑥))
3834, 35, 37oveq123d 7234 . . . . . . . . 9 ((𝑓 = 𝐹𝑤 = 𝑊) → (𝑘( ·𝑠𝑤)(𝑓𝑥)) = (𝑘 · (𝐹𝑥)))
39 fveq2 6717 . . . . . . . . . . . 12 (𝑤 = 𝑊 → (LSpan‘𝑤) = (LSpan‘𝑊))
40 islindf.k . . . . . . . . . . . 12 𝐾 = (LSpan‘𝑊)
4139, 40eqtr4di 2796 . . . . . . . . . . 11 (𝑤 = 𝑊 → (LSpan‘𝑤) = 𝐾)
4241adantl 485 . . . . . . . . . 10 ((𝑓 = 𝐹𝑤 = 𝑊) → (LSpan‘𝑤) = 𝐾)
43 imaeq1 5924 . . . . . . . . . . . 12 (𝑓 = 𝐹 → (𝑓 “ (dom 𝑓 ∖ {𝑥})) = (𝐹 “ (dom 𝑓 ∖ {𝑥})))
443difeq1d 4036 . . . . . . . . . . . . 13 (𝑓 = 𝐹 → (dom 𝑓 ∖ {𝑥}) = (dom 𝐹 ∖ {𝑥}))
4544imaeq2d 5929 . . . . . . . . . . . 12 (𝑓 = 𝐹 → (𝐹 “ (dom 𝑓 ∖ {𝑥})) = (𝐹 “ (dom 𝐹 ∖ {𝑥})))
4643, 45eqtrd 2777 . . . . . . . . . . 11 (𝑓 = 𝐹 → (𝑓 “ (dom 𝑓 ∖ {𝑥})) = (𝐹 “ (dom 𝐹 ∖ {𝑥})))
4746adantr 484 . . . . . . . . . 10 ((𝑓 = 𝐹𝑤 = 𝑊) → (𝑓 “ (dom 𝑓 ∖ {𝑥})) = (𝐹 “ (dom 𝐹 ∖ {𝑥})))
4842, 47fveq12d 6724 . . . . . . . . 9 ((𝑓 = 𝐹𝑤 = 𝑊) → ((LSpan‘𝑤)‘(𝑓 “ (dom 𝑓 ∖ {𝑥}))) = (𝐾‘(𝐹 “ (dom 𝐹 ∖ {𝑥}))))
4938, 48eleq12d 2832 . . . . . . . 8 ((𝑓 = 𝐹𝑤 = 𝑊) → ((𝑘( ·𝑠𝑤)(𝑓𝑥)) ∈ ((LSpan‘𝑤)‘(𝑓 “ (dom 𝑓 ∖ {𝑥}))) ↔ (𝑘 · (𝐹𝑥)) ∈ (𝐾‘(𝐹 “ (dom 𝐹 ∖ {𝑥})))))
5049notbid 321 . . . . . . 7 ((𝑓 = 𝐹𝑤 = 𝑊) → (¬ (𝑘( ·𝑠𝑤)(𝑓𝑥)) ∈ ((LSpan‘𝑤)‘(𝑓 “ (dom 𝑓 ∖ {𝑥}))) ↔ ¬ (𝑘 · (𝐹𝑥)) ∈ (𝐾‘(𝐹 “ (dom 𝐹 ∖ {𝑥})))))
5130, 50raleqbidv 3313 . . . . . 6 ((𝑓 = 𝐹𝑤 = 𝑊) → (∀𝑘 ∈ ((Base‘(Scalar‘𝑤)) ∖ {(0g‘(Scalar‘𝑤))}) ¬ (𝑘( ·𝑠𝑤)(𝑓𝑥)) ∈ ((LSpan‘𝑤)‘(𝑓 “ (dom 𝑓 ∖ {𝑥}))) ↔ ∀𝑘 ∈ (𝑁 ∖ { 0 }) ¬ (𝑘 · (𝐹𝑥)) ∈ (𝐾‘(𝐹 “ (dom 𝐹 ∖ {𝑥})))))
524, 51raleqbidv 3313 . . . . 5 ((𝑓 = 𝐹𝑤 = 𝑊) → (∀𝑥 ∈ dom 𝑓𝑘 ∈ ((Base‘(Scalar‘𝑤)) ∖ {(0g‘(Scalar‘𝑤))}) ¬ (𝑘( ·𝑠𝑤)(𝑓𝑥)) ∈ ((LSpan‘𝑤)‘(𝑓 “ (dom 𝑓 ∖ {𝑥}))) ↔ ∀𝑥 ∈ dom 𝐹𝑘 ∈ (𝑁 ∖ { 0 }) ¬ (𝑘 · (𝐹𝑥)) ∈ (𝐾‘(𝐹 “ (dom 𝐹 ∖ {𝑥})))))
5318, 52syl5bb 286 . . . 4 ((𝑓 = 𝐹𝑤 = 𝑊) → ([(Scalar‘𝑤) / 𝑠]𝑥 ∈ dom 𝑓𝑘 ∈ ((Base‘𝑠) ∖ {(0g𝑠)}) ¬ (𝑘( ·𝑠𝑤)(𝑓𝑥)) ∈ ((LSpan‘𝑤)‘(𝑓 “ (dom 𝑓 ∖ {𝑥}))) ↔ ∀𝑥 ∈ dom 𝐹𝑘 ∈ (𝑁 ∖ { 0 }) ¬ (𝑘 · (𝐹𝑥)) ∈ (𝐾‘(𝐹 “ (dom 𝐹 ∖ {𝑥})))))
5410, 53anbi12d 634 . . 3 ((𝑓 = 𝐹𝑤 = 𝑊) → ((𝑓:dom 𝑓⟶(Base‘𝑤) ∧ [(Scalar‘𝑤) / 𝑠]𝑥 ∈ dom 𝑓𝑘 ∈ ((Base‘𝑠) ∖ {(0g𝑠)}) ¬ (𝑘( ·𝑠𝑤)(𝑓𝑥)) ∈ ((LSpan‘𝑤)‘(𝑓 “ (dom 𝑓 ∖ {𝑥})))) ↔ (𝐹:dom 𝐹𝐵 ∧ ∀𝑥 ∈ dom 𝐹𝑘 ∈ (𝑁 ∖ { 0 }) ¬ (𝑘 · (𝐹𝑥)) ∈ (𝐾‘(𝐹 “ (dom 𝐹 ∖ {𝑥}))))))
55 df-lindf 20768 . . 3 LIndF = {⟨𝑓, 𝑤⟩ ∣ (𝑓:dom 𝑓⟶(Base‘𝑤) ∧ [(Scalar‘𝑤) / 𝑠]𝑥 ∈ dom 𝑓𝑘 ∈ ((Base‘𝑠) ∖ {(0g𝑠)}) ¬ (𝑘( ·𝑠𝑤)(𝑓𝑥)) ∈ ((LSpan‘𝑤)‘(𝑓 “ (dom 𝑓 ∖ {𝑥}))))}
5654, 55brabga 5415 . 2 ((𝐹𝑋𝑊𝑌) → (𝐹 LIndF 𝑊 ↔ (𝐹:dom 𝐹𝐵 ∧ ∀𝑥 ∈ dom 𝐹𝑘 ∈ (𝑁 ∖ { 0 }) ¬ (𝑘 · (𝐹𝑥)) ∈ (𝐾‘(𝐹 “ (dom 𝐹 ∖ {𝑥}))))))
5756ancoms 462 1 ((𝑊𝑌𝐹𝑋) → (𝐹 LIndF 𝑊 ↔ (𝐹:dom 𝐹𝐵 ∧ ∀𝑥 ∈ dom 𝐹𝑘 ∈ (𝑁 ∖ { 0 }) ¬ (𝑘 · (𝐹𝑥)) ∈ (𝐾‘(𝐹 “ (dom 𝐹 ∖ {𝑥}))))))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 209  wa 399   = wceq 1543  wcel 2110  wral 3061  [wsbc 3694  cdif 3863  {csn 4541   class class class wbr 5053  dom cdm 5551  cima 5554  wf 6376  cfv 6380  (class class class)co 7213  Basecbs 16760  Scalarcsca 16805   ·𝑠 cvsca 16806  0gc0g 16944  LSpanclspn 20008   LIndF clindf 20766
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1803  ax-4 1817  ax-5 1918  ax-6 1976  ax-7 2016  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2158  ax-12 2175  ax-ext 2708  ax-sep 5192  ax-nul 5199  ax-pr 5322
This theorem depends on definitions:  df-bi 210  df-an 400  df-or 848  df-3an 1091  df-tru 1546  df-fal 1556  df-ex 1788  df-nf 1792  df-sb 2071  df-mo 2539  df-eu 2568  df-clab 2715  df-cleq 2729  df-clel 2816  df-ral 3066  df-rex 3067  df-rab 3070  df-v 3410  df-sbc 3695  df-dif 3869  df-un 3871  df-in 3873  df-ss 3883  df-nul 4238  df-if 4440  df-sn 4542  df-pr 4544  df-op 4548  df-uni 4820  df-br 5054  df-opab 5116  df-xp 5557  df-rel 5558  df-cnv 5559  df-co 5560  df-dm 5561  df-rn 5562  df-res 5563  df-ima 5564  df-iota 6338  df-fun 6382  df-fn 6383  df-f 6384  df-fv 6388  df-ov 7216  df-lindf 20768
This theorem is referenced by:  islinds2  20775  islindf2  20776  lindff  20777  lindfind  20778  f1lindf  20784  lsslindf  20792  lindfpropd  31290  matunitlindf  35512
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