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Theorem islsati 39768
Description: A 1-dim subspace (atom) (of a left module or left vector space) equals the span of some vector. (Contributed by NM, 1-Oct-2014.)
Hypotheses
Ref Expression
islsati.v 𝑉 = (Base‘𝑊)
islsati.n 𝑁 = (LSpan‘𝑊)
islsati.a 𝐴 = (LSAtoms‘𝑊)
Assertion
Ref Expression
islsati ((𝑊𝑋𝑈𝐴) → ∃𝑣𝑉 𝑈 = (𝑁‘{𝑣}))
Distinct variable groups:   𝑣,𝑁   𝑣,𝑈   𝑣,𝑉   𝑣,𝑊   𝑣,𝑋
Allowed substitution hint:   𝐴(𝑣)

Proof of Theorem islsati
StepHypRef Expression
1 difss 4090 . 2 (𝑉 ∖ {(0g𝑊)}) ⊆ 𝑉
2 islsati.v . . . 4 𝑉 = (Base‘𝑊)
3 islsati.n . . . 4 𝑁 = (LSpan‘𝑊)
4 eqid 2763 . . . 4 (0g𝑊) = (0g𝑊)
5 islsati.a . . . 4 𝐴 = (LSAtoms‘𝑊)
62, 3, 4, 5islsat 39765 . . 3 (𝑊𝑋 → (𝑈𝐴 ↔ ∃𝑣 ∈ (𝑉 ∖ {(0g𝑊)})𝑈 = (𝑁‘{𝑣})))
76biimpa 481 . 2 ((𝑊𝑋𝑈𝐴) → ∃𝑣 ∈ (𝑉 ∖ {(0g𝑊)})𝑈 = (𝑁‘{𝑣}))
8 ssrexv 4007 . 2 ((𝑉 ∖ {(0g𝑊)}) ⊆ 𝑉 → (∃𝑣 ∈ (𝑉 ∖ {(0g𝑊)})𝑈 = (𝑁‘{𝑣}) → ∃𝑣𝑉 𝑈 = (𝑁‘{𝑣})))
91, 7, 8mpsyl 69 1 ((𝑊𝑋𝑈𝐴) → ∃𝑣𝑉 𝑈 = (𝑁‘{𝑣}))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 400   = wceq 1570  wcel 2143  wrex 3089  cdif 3902  wss 3905  {csn 4589  cfv 6536  Basecbs 17264  0gc0g 17487  LSpanclspn 21092  LSAtomsclsa 39748
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1825  ax-4 1839  ax-5 1940  ax-6 1997  ax-7 2038  ax-8 2145  ax-9 2153  ax-10 2176  ax-11 2192  ax-12 2213  ax-ext 2735  ax-sep 5257  ax-nul 5269  ax-pr 5404  ax-un 7732
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1810  df-nf 1814  df-sb 2097  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2838  df-nfc 2912  df-ne 2959  df-ral 3080  df-rex 3090  df-rab 3417  df-v 3457  df-dif 3908  df-un 3910  df-in 3912  df-ss 3922  df-nul 4287  df-if 4488  df-sn 4590  df-pr 4592  df-op 4596  df-uni 4873  df-br 5110  df-opab 5174  df-mpt 5193  df-id 5556  df-xp 5667  df-rel 5668  df-cnv 5669  df-co 5670  df-dm 5671  df-rn 5672  df-res 5673  df-ima 5674  df-iota 6492  df-fun 6538  df-fn 6539  df-f 6540  df-fv 6544  df-lsatoms 39750
This theorem is referenced by:  lsmsatcv  39784  dihjat2  42205  dvh4dimlem  42217  lcfl8  42276  mapdval2N  42404  mapdspex  42442  hdmaprnlem16N  42636
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