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Theorem lssssg 14669
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 2238 . . . 4  |-  (Scalar `  W )  =  (Scalar `  W )
2 eqid 2238 . . . 4  |-  ( Base `  (Scalar `  W )
)  =  ( Base `  (Scalar `  W )
)
3 lssss.v . . . 4  |-  V  =  ( Base `  W
)
4 eqid 2238 . . . 4  |-  ( +g  `  W )  =  ( +g  `  W )
5 eqid 2238 . . . 4  |-  ( .s
`  W )  =  ( .s `  W
)
6 lssss.s . . . 4  |-  S  =  ( LSubSp `  W )
71, 2, 3, 4, 5, 6islssmg 14667 . . 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 1040 1  |-  ( ( W  e.  X  /\  U  e.  S )  ->  U  C_  V )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    /\ w3a 1009    = wceq 1402   E.wex 1545    e. wcel 2209   A.wral 2528    C_ wss 3220   ` cfv 5372  (class class class)co 6075   Basecbs 13330   +g cplusg 13408  Scalarcsca 13411   .scvsca 13412   LSubSpclss 14661
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 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4244  ax-pow 4306  ax-pr 4341  ax-un 4573  ax-cnex 8260  ax-resscn 8261  ax-1re 8263  ax-addrcl 8266
This theorem depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533  df-rex 2534  df-rab 2537  df-v 2823  df-sbc 3052  df-csb 3148  df-un 3224  df-in 3226  df-ss 3233  df-pw 3687  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-int 3966  df-br 4126  df-opab 4188  df-mpt 4189  df-id 4433  df-xp 4775  df-rel 4776  df-cnv 4777  df-co 4778  df-dm 4779  df-rn 4780  df-res 4781  df-iota 5332  df-fun 5374  df-fn 5375  df-fv 5380  df-ov 6078  df-inn 9284  df-ndx 13333  df-slot 13334  df-base 13336  df-lssm 14662
This theorem is referenced by:  lsselg  14670  lssuni  14672  lsssubg  14686  islss3  14688  lsslss  14690  lssintclm  14693  lspid  14706  lspssv  14707  lspssp  14712  lsslsp  14738  lidlss  14785
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