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Theorem lkrshp 29917
Description: The kernel of a nonzero functional is a hyperplane. (Contributed by NM, 29-Jun-2014.)
Hypotheses
Ref Expression
lkrshp.v  |-  V  =  ( Base `  W
)
lkrshp.d  |-  D  =  (Scalar `  W )
lkrshp.z  |-  .0.  =  ( 0g `  D )
lkrshp.h  |-  H  =  (LSHyp `  W )
lkrshp.f  |-  F  =  (LFnl `  W )
lkrshp.k  |-  K  =  (LKer `  W )
Assertion
Ref Expression
lkrshp  |-  ( ( W  e.  LVec  /\  G  e.  F  /\  G  =/=  ( V  X.  {  .0.  } ) )  -> 
( K `  G
)  e.  H )

Proof of Theorem lkrshp
Dummy variable  v is distinct from all other variables.
StepHypRef Expression
1 lveclmod 15875 . . . 4  |-  ( W  e.  LVec  ->  W  e. 
LMod )
213ad2ant1 976 . . 3  |-  ( ( W  e.  LVec  /\  G  e.  F  /\  G  =/=  ( V  X.  {  .0.  } ) )  ->  W  e.  LMod )
3 simp2 956 . . 3  |-  ( ( W  e.  LVec  /\  G  e.  F  /\  G  =/=  ( V  X.  {  .0.  } ) )  ->  G  e.  F )
4 lkrshp.f . . . 4  |-  F  =  (LFnl `  W )
5 lkrshp.k . . . 4  |-  K  =  (LKer `  W )
6 eqid 2296 . . . 4  |-  ( LSubSp `  W )  =  (
LSubSp `  W )
74, 5, 6lkrlss 29907 . . 3  |-  ( ( W  e.  LMod  /\  G  e.  F )  ->  ( K `  G )  e.  ( LSubSp `  W )
)
82, 3, 7syl2anc 642 . 2  |-  ( ( W  e.  LVec  /\  G  e.  F  /\  G  =/=  ( V  X.  {  .0.  } ) )  -> 
( K `  G
)  e.  ( LSubSp `  W ) )
9 simp3 957 . . 3  |-  ( ( W  e.  LVec  /\  G  e.  F  /\  G  =/=  ( V  X.  {  .0.  } ) )  ->  G  =/=  ( V  X.  {  .0.  } ) )
10 lkrshp.d . . . . . 6  |-  D  =  (Scalar `  W )
11 lkrshp.z . . . . . 6  |-  .0.  =  ( 0g `  D )
12 lkrshp.v . . . . . 6  |-  V  =  ( Base `  W
)
1310, 11, 12, 4, 5lkr0f 29906 . . . . 5  |-  ( ( W  e.  LMod  /\  G  e.  F )  ->  (
( K `  G
)  =  V  <->  G  =  ( V  X.  {  .0.  } ) ) )
142, 3, 13syl2anc 642 . . . 4  |-  ( ( W  e.  LVec  /\  G  e.  F  /\  G  =/=  ( V  X.  {  .0.  } ) )  -> 
( ( K `  G )  =  V  <-> 
G  =  ( V  X.  {  .0.  }
) ) )
1514necon3bid 2494 . . 3  |-  ( ( W  e.  LVec  /\  G  e.  F  /\  G  =/=  ( V  X.  {  .0.  } ) )  -> 
( ( K `  G )  =/=  V  <->  G  =/=  ( V  X.  {  .0.  } ) ) )
169, 15mpbird 223 . 2  |-  ( ( W  e.  LVec  /\  G  e.  F  /\  G  =/=  ( V  X.  {  .0.  } ) )  -> 
( K `  G
)  =/=  V )
17 eqid 2296 . . . 4  |-  ( 1r
`  D )  =  ( 1r `  D
)
1810, 11, 17, 12, 4lfl1 29882 . . 3  |-  ( ( W  e.  LVec  /\  G  e.  F  /\  G  =/=  ( V  X.  {  .0.  } ) )  ->  E. v  e.  V  ( G `  v )  =  ( 1r `  D ) )
19 simp11 985 . . . . . 6  |-  ( ( ( W  e.  LVec  /\  G  e.  F  /\  G  =/=  ( V  X.  {  .0.  } ) )  /\  v  e.  V  /\  ( G `  v
)  =  ( 1r
`  D ) )  ->  W  e.  LVec )
20 simp2 956 . . . . . 6  |-  ( ( ( W  e.  LVec  /\  G  e.  F  /\  G  =/=  ( V  X.  {  .0.  } ) )  /\  v  e.  V  /\  ( G `  v
)  =  ( 1r
`  D ) )  ->  v  e.  V
)
21 simp12 986 . . . . . 6  |-  ( ( ( W  e.  LVec  /\  G  e.  F  /\  G  =/=  ( V  X.  {  .0.  } ) )  /\  v  e.  V  /\  ( G `  v
)  =  ( 1r
`  D ) )  ->  G  e.  F
)
22 simp3 957 . . . . . . . 8  |-  ( ( ( W  e.  LVec  /\  G  e.  F  /\  G  =/=  ( V  X.  {  .0.  } ) )  /\  v  e.  V  /\  ( G `  v
)  =  ( 1r
`  D ) )  ->  ( G `  v )  =  ( 1r `  D ) )
2310lvecdrng 15874 . . . . . . . . 9  |-  ( W  e.  LVec  ->  D  e.  DivRing )
2411, 17drngunz 15543 . . . . . . . . 9  |-  ( D  e.  DivRing  ->  ( 1r `  D )  =/=  .0.  )
2519, 23, 243syl 18 . . . . . . . 8  |-  ( ( ( W  e.  LVec  /\  G  e.  F  /\  G  =/=  ( V  X.  {  .0.  } ) )  /\  v  e.  V  /\  ( G `  v
)  =  ( 1r
`  D ) )  ->  ( 1r `  D )  =/=  .0.  )
2622, 25eqnetrd 2477 . . . . . . 7  |-  ( ( ( W  e.  LVec  /\  G  e.  F  /\  G  =/=  ( V  X.  {  .0.  } ) )  /\  v  e.  V  /\  ( G `  v
)  =  ( 1r
`  D ) )  ->  ( G `  v )  =/=  .0.  )
27 simpl11 1030 . . . . . . . . . 10  |-  ( ( ( ( W  e. 
LVec  /\  G  e.  F  /\  G  =/=  ( V  X.  {  .0.  }
) )  /\  v  e.  V  /\  ( G `  v )  =  ( 1r `  D ) )  /\  v  e.  ( K `  G ) )  ->  W  e.  LVec )
28 simpl12 1031 . . . . . . . . . 10  |-  ( ( ( ( W  e. 
LVec  /\  G  e.  F  /\  G  =/=  ( V  X.  {  .0.  }
) )  /\  v  e.  V  /\  ( G `  v )  =  ( 1r `  D ) )  /\  v  e.  ( K `  G ) )  ->  G  e.  F )
29 simpr 447 . . . . . . . . . 10  |-  ( ( ( ( W  e. 
LVec  /\  G  e.  F  /\  G  =/=  ( V  X.  {  .0.  }
) )  /\  v  e.  V  /\  ( G `  v )  =  ( 1r `  D ) )  /\  v  e.  ( K `  G ) )  -> 
v  e.  ( K `
 G ) )
3010, 11, 4, 5lkrf0 29905 . . . . . . . . . 10  |-  ( ( W  e.  LVec  /\  G  e.  F  /\  v  e.  ( K `  G
) )  ->  ( G `  v )  =  .0.  )
3127, 28, 29, 30syl3anc 1182 . . . . . . . . 9  |-  ( ( ( ( W  e. 
LVec  /\  G  e.  F  /\  G  =/=  ( V  X.  {  .0.  }
) )  /\  v  e.  V  /\  ( G `  v )  =  ( 1r `  D ) )  /\  v  e.  ( K `  G ) )  -> 
( G `  v
)  =  .0.  )
3231ex 423 . . . . . . . 8  |-  ( ( ( W  e.  LVec  /\  G  e.  F  /\  G  =/=  ( V  X.  {  .0.  } ) )  /\  v  e.  V  /\  ( G `  v
)  =  ( 1r
`  D ) )  ->  ( v  e.  ( K `  G
)  ->  ( G `  v )  =  .0.  ) )
3332necon3ad 2495 . . . . . . 7  |-  ( ( ( W  e.  LVec  /\  G  e.  F  /\  G  =/=  ( V  X.  {  .0.  } ) )  /\  v  e.  V  /\  ( G `  v
)  =  ( 1r
`  D ) )  ->  ( ( G `
 v )  =/= 
.0.  ->  -.  v  e.  ( K `  G ) ) )
3426, 33mpd 14 . . . . . 6  |-  ( ( ( W  e.  LVec  /\  G  e.  F  /\  G  =/=  ( V  X.  {  .0.  } ) )  /\  v  e.  V  /\  ( G `  v
)  =  ( 1r
`  D ) )  ->  -.  v  e.  ( K `  G ) )
35 eqid 2296 . . . . . . 7  |-  ( LSpan `  W )  =  (
LSpan `  W )
3612, 35, 4, 5lkrlsp3 29916 . . . . . 6  |-  ( ( W  e.  LVec  /\  (
v  e.  V  /\  G  e.  F )  /\  -.  v  e.  ( K `  G ) )  ->  ( ( LSpan `  W ) `  ( ( K `  G )  u.  {
v } ) )  =  V )
3719, 20, 21, 34, 36syl121anc 1187 . . . . 5  |-  ( ( ( W  e.  LVec  /\  G  e.  F  /\  G  =/=  ( V  X.  {  .0.  } ) )  /\  v  e.  V  /\  ( G `  v
)  =  ( 1r
`  D ) )  ->  ( ( LSpan `  W ) `  (
( K `  G
)  u.  { v } ) )  =  V )
38373expia 1153 . . . 4  |-  ( ( ( W  e.  LVec  /\  G  e.  F  /\  G  =/=  ( V  X.  {  .0.  } ) )  /\  v  e.  V
)  ->  ( ( G `  v )  =  ( 1r `  D )  ->  (
( LSpan `  W ) `  ( ( K `  G )  u.  {
v } ) )  =  V ) )
3938reximdva 2668 . . 3  |-  ( ( W  e.  LVec  /\  G  e.  F  /\  G  =/=  ( V  X.  {  .0.  } ) )  -> 
( E. v  e.  V  ( G `  v )  =  ( 1r `  D )  ->  E. v  e.  V  ( ( LSpan `  W
) `  ( ( K `  G )  u.  { v } ) )  =  V ) )
4018, 39mpd 14 . 2  |-  ( ( W  e.  LVec  /\  G  e.  F  /\  G  =/=  ( V  X.  {  .0.  } ) )  ->  E. v  e.  V  ( ( LSpan `  W
) `  ( ( K `  G )  u.  { v } ) )  =  V )
41 lkrshp.h . . . 4  |-  H  =  (LSHyp `  W )
4212, 35, 6, 41islshp 29791 . . 3  |-  ( W  e.  LVec  ->  ( ( K `  G )  e.  H  <->  ( ( K `  G )  e.  ( LSubSp `  W )  /\  ( K `  G
)  =/=  V  /\  E. v  e.  V  ( ( LSpan `  W ) `  ( ( K `  G )  u.  {
v } ) )  =  V ) ) )
43423ad2ant1 976 . 2  |-  ( ( W  e.  LVec  /\  G  e.  F  /\  G  =/=  ( V  X.  {  .0.  } ) )  -> 
( ( K `  G )  e.  H  <->  ( ( K `  G
)  e.  ( LSubSp `  W )  /\  ( K `  G )  =/=  V  /\  E. v  e.  V  ( ( LSpan `  W ) `  ( ( K `  G )  u.  {
v } ) )  =  V ) ) )
448, 16, 40, 43mpbir3and 1135 1  |-  ( ( W  e.  LVec  /\  G  e.  F  /\  G  =/=  ( V  X.  {  .0.  } ) )  -> 
( K `  G
)  e.  H )
Colors of variables: wff set class
Syntax hints:   -. wn 3    -> wi 4    <-> wb 176    /\ wa 358    /\ w3a 934    = wceq 1632    e. wcel 1696    =/= wne 2459   E.wrex 2557    u. cun 3163   {csn 3653    X. cxp 4703   ` cfv 5271   Basecbs 13164  Scalarcsca 13227   0gc0g 13416   1rcur 15355   DivRingcdr 15528   LModclmod 15643   LSubSpclss 15705   LSpanclspn 15744   LVecclvec 15871  LSHypclsh 29787  LFnlclfn 29869  LKerclk 29897
This theorem is referenced by:  lkrshp3  29918  lkrshpor  29919  lshpset2N  29931  lfl1dim  29933  lfl1dim2N  29934  hdmaplkr  32728
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1536  ax-5 1547  ax-17 1606  ax-9 1644  ax-8 1661  ax-13 1698  ax-14 1700  ax-6 1715  ax-7 1720  ax-11 1727  ax-12 1878  ax-ext 2277  ax-rep 4147  ax-sep 4157  ax-nul 4165  ax-pow 4204  ax-pr 4230  ax-un 4528  ax-cnex 8809  ax-resscn 8810  ax-1cn 8811  ax-icn 8812  ax-addcl 8813  ax-addrcl 8814  ax-mulcl 8815  ax-mulrcl 8816  ax-mulcom 8817  ax-addass 8818  ax-mulass 8819  ax-distr 8820  ax-i2m1 8821  ax-1ne0 8822  ax-1rid 8823  ax-rnegex 8824  ax-rrecex 8825  ax-cnre 8826  ax-pre-lttri 8827  ax-pre-lttrn 8828  ax-pre-ltadd 8829  ax-pre-mulgt0 8830
This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-3or 935  df-3an 936  df-tru 1310  df-ex 1532  df-nf 1535  df-sb 1639  df-eu 2160  df-mo 2161  df-clab 2283  df-cleq 2289  df-clel 2292  df-nfc 2421  df-ne 2461  df-nel 2462  df-ral 2561  df-rex 2562  df-reu 2563  df-rmo 2564  df-rab 2565  df-v 2803  df-sbc 3005  df-csb 3095  df-dif 3168  df-un 3170  df-in 3172  df-ss 3179  df-pss 3181  df-nul 3469  df-if 3579  df-pw 3640  df-sn 3659  df-pr 3660  df-tp 3661  df-op 3662  df-uni 3844  df-int 3879  df-iun 3923  df-br 4040  df-opab 4094  df-mpt 4095  df-tr 4130  df-eprel 4321  df-id 4325  df-po 4330  df-so 4331  df-fr 4368  df-we 4370  df-ord 4411  df-on 4412  df-lim 4413  df-suc 4414  df-om 4673  df-xp 4711  df-rel 4712  df-cnv 4713  df-co 4714  df-dm 4715  df-rn 4716  df-res 4717  df-ima 4718  df-iota 5235  df-fun 5273  df-fn 5274  df-f 5275  df-f1 5276  df-fo 5277  df-f1o 5278  df-fv 5279  df-ov 5877  df-oprab 5878  df-mpt2 5879  df-1st 6138  df-2nd 6139  df-tpos 6250  df-riota 6320  df-recs 6404  df-rdg 6439  df-er 6676  df-map 6790  df-en 6880  df-dom 6881  df-sdom 6882  df-pnf 8885  df-mnf 8886  df-xr 8887  df-ltxr 8888  df-le 8889  df-sub 9055  df-neg 9056  df-nn 9763  df-2 9820  df-3 9821  df-ndx 13167  df-slot 13168  df-base 13169  df-sets 13170  df-ress 13171  df-plusg 13237  df-mulr 13238  df-0g 13420  df-mnd 14383  df-submnd 14432  df-grp 14505  df-minusg 14506  df-sbg 14507  df-subg 14634  df-cntz 14809  df-lsm 14963  df-cmn 15107  df-abl 15108  df-mgp 15342  df-rng 15356  df-ur 15358  df-oppr 15421  df-dvdsr 15439  df-unit 15440  df-invr 15470  df-drng 15530  df-lmod 15645  df-lss 15706  df-lsp 15745  df-lvec 15872  df-lshyp 29789  df-lfl 29870  df-lkr 29898
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