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Theorem lssssg 14500
Description: A subspace is a set of vectors. (Contributed by NM, 8-Dec-2013.) (Revised by Mario Carneiro, 8-Jan-2015.)
Hypotheses
Ref Expression
lssss.v 𝑉 = (Base‘𝑊)
lssss.s 𝑆 = (LSubSp‘𝑊)
Assertion
Ref Expression
lssssg ((𝑊𝑋𝑈𝑆) → 𝑈𝑉)

Proof of Theorem lssssg
Dummy variables 𝑎 𝑏 𝑗 𝑥 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 eqid 2232 . . . 4 (Scalar‘𝑊) = (Scalar‘𝑊)
2 eqid 2232 . . . 4 (Base‘(Scalar‘𝑊)) = (Base‘(Scalar‘𝑊))
3 lssss.v . . . 4 𝑉 = (Base‘𝑊)
4 eqid 2232 . . . 4 (+g𝑊) = (+g𝑊)
5 eqid 2232 . . . 4 ( ·𝑠𝑊) = ( ·𝑠𝑊)
6 lssss.s . . . 4 𝑆 = (LSubSp‘𝑊)
71, 2, 3, 4, 5, 6islssmg 14498 . . 3 (𝑊𝑋 → (𝑈𝑆 ↔ (𝑈𝑉 ∧ ∃𝑗 𝑗𝑈 ∧ ∀𝑥 ∈ (Base‘(Scalar‘𝑊))∀𝑎𝑈𝑏𝑈 ((𝑥( ·𝑠𝑊)𝑎)(+g𝑊)𝑏) ∈ 𝑈)))
87biimpa 296 . 2 ((𝑊𝑋𝑈𝑆) → (𝑈𝑉 ∧ ∃𝑗 𝑗𝑈 ∧ ∀𝑥 ∈ (Base‘(Scalar‘𝑊))∀𝑎𝑈𝑏𝑈 ((𝑥( ·𝑠𝑊)𝑎)(+g𝑊)𝑏) ∈ 𝑈))
98simp1d 1036 1 ((𝑊𝑋𝑈𝑆) → 𝑈𝑉)
Colors of variables: wff set class
Syntax hints:  wi 4  wa 104  w3a 1005   = wceq 1398  wex 1541  wcel 2203  wral 2520  wss 3210  cfv 5351  (class class class)co 6049  Basecbs 13204  +gcplusg 13282  Scalarcsca 13285   ·𝑠 cvsca 13286  LSubSpclss 14492
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2205  ax-14 2206  ax-ext 2214  ax-sep 4227  ax-pow 4286  ax-pr 4321  ax-un 4553  ax-cnex 8217  ax-resscn 8218  ax-1re 8220  ax-addrcl 8223
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-eu 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ral 2525  df-rex 2526  df-rab 2529  df-v 2814  df-sbc 3042  df-csb 3138  df-un 3214  df-in 3216  df-ss 3223  df-pw 3670  df-sn 3694  df-pr 3695  df-op 3697  df-uni 3914  df-int 3949  df-br 4109  df-opab 4171  df-mpt 4172  df-id 4413  df-xp 4754  df-rel 4755  df-cnv 4756  df-co 4757  df-dm 4758  df-rn 4759  df-res 4760  df-iota 5311  df-fun 5353  df-fn 5354  df-fv 5359  df-ov 6052  df-inn 9237  df-ndx 13207  df-slot 13208  df-base 13210  df-lssm 14493
This theorem is referenced by:  lsselg  14501  lssuni  14503  lsssubg  14517  islss3  14519  lsslss  14521  lssintclm  14524  lspid  14537  lspssv  14538  lspssp  14543  lsslsp  14569  lidlss  14616
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