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Theorem lssssg 14093
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  |-  ( ( W  e.  X  /\  U  e.  S )  ->  U  C_  V )

Proof of Theorem lssssg
Dummy variables  a  b  j  x are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 eqid 2204 . . . 4  |-  (Scalar `  W )  =  (Scalar `  W )
2 eqid 2204 . . . 4  |-  ( Base `  (Scalar `  W )
)  =  ( Base `  (Scalar `  W )
)
3 lssss.v . . . 4  |-  V  =  ( Base `  W
)
4 eqid 2204 . . . 4  |-  ( +g  `  W )  =  ( +g  `  W )
5 eqid 2204 . . . 4  |-  ( .s
`  W )  =  ( .s `  W
)
6 lssss.s . . . 4  |-  S  =  ( LSubSp `  W )
71, 2, 3, 4, 5, 6islssmg 14091 . . 3  |-  ( W  e.  X  ->  ( U  e.  S  <->  ( U  C_  V  /\  E. j 
j  e.  U  /\  A. x  e.  ( Base `  (Scalar `  W )
) A. a  e.  U  A. b  e.  U  ( ( x ( .s `  W
) a ) ( +g  `  W ) b )  e.  U
) ) )
87biimpa 296 . 2  |-  ( ( W  e.  X  /\  U  e.  S )  ->  ( U  C_  V  /\  E. j  j  e.  U  /\  A. x  e.  ( Base `  (Scalar `  W ) ) A. a  e.  U  A. b  e.  U  (
( x ( .s
`  W ) a ) ( +g  `  W
) b )  e.  U ) )
98simp1d 1011 1  |-  ( ( W  e.  X  /\  U  e.  S )  ->  U  C_  V )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    /\ w3a 980    = wceq 1372   E.wex 1514    e. wcel 2175   A.wral 2483    C_ wss 3165   ` cfv 5270  (class class class)co 5943   Basecbs 12803   +g cplusg 12880  Scalarcsca 12883   .scvsca 12884   LSubSpclss 14085
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 710  ax-5 1469  ax-7 1470  ax-gen 1471  ax-ie1 1515  ax-ie2 1516  ax-8 1526  ax-10 1527  ax-11 1528  ax-i12 1529  ax-bndl 1531  ax-4 1532  ax-17 1548  ax-i9 1552  ax-ial 1556  ax-i5r 1557  ax-13 2177  ax-14 2178  ax-ext 2186  ax-sep 4161  ax-pow 4217  ax-pr 4252  ax-un 4479  ax-cnex 8015  ax-resscn 8016  ax-1re 8018  ax-addrcl 8021
This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1375  df-nf 1483  df-sb 1785  df-eu 2056  df-mo 2057  df-clab 2191  df-cleq 2197  df-clel 2200  df-nfc 2336  df-ral 2488  df-rex 2489  df-rab 2492  df-v 2773  df-sbc 2998  df-csb 3093  df-un 3169  df-in 3171  df-ss 3178  df-pw 3617  df-sn 3638  df-pr 3639  df-op 3641  df-uni 3850  df-int 3885  df-br 4044  df-opab 4105  df-mpt 4106  df-id 4339  df-xp 4680  df-rel 4681  df-cnv 4682  df-co 4683  df-dm 4684  df-rn 4685  df-res 4686  df-iota 5231  df-fun 5272  df-fn 5273  df-fv 5278  df-ov 5946  df-inn 9036  df-ndx 12806  df-slot 12807  df-base 12809  df-lssm 14086
This theorem is referenced by:  lsselg  14094  lssuni  14096  lsssubg  14110  islss3  14112  lsslss  14114  lssintclm  14117  lspid  14130  lspssv  14131  lspssp  14136  lsslsp  14162  lidlss  14209
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