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Theorem lkrcl 34379
Description: A member of the kernel of a functional is a vector. (Contributed by NM, 16-Apr-2014.)
Hypotheses
Ref Expression
lkrcl.v  |-  V  =  ( Base `  W
)
lkrcl.f  |-  F  =  (LFnl `  W )
lkrcl.k  |-  K  =  (LKer `  W )
Assertion
Ref Expression
lkrcl  |-  ( ( W  e.  Y  /\  G  e.  F  /\  X  e.  ( K `  G ) )  ->  X  e.  V )

Proof of Theorem lkrcl
StepHypRef Expression
1 lkrcl.v . . . 4  |-  V  =  ( Base `  W
)
2 eqid 2622 . . . 4  |-  (Scalar `  W )  =  (Scalar `  W )
3 eqid 2622 . . . 4  |-  ( 0g
`  (Scalar `  W )
)  =  ( 0g
`  (Scalar `  W )
)
4 lkrcl.f . . . 4  |-  F  =  (LFnl `  W )
5 lkrcl.k . . . 4  |-  K  =  (LKer `  W )
61, 2, 3, 4, 5ellkr 34376 . . 3  |-  ( ( W  e.  Y  /\  G  e.  F )  ->  ( X  e.  ( K `  G )  <-> 
( X  e.  V  /\  ( G `  X
)  =  ( 0g
`  (Scalar `  W )
) ) ) )
76simprbda 653 . 2  |-  ( ( ( W  e.  Y  /\  G  e.  F
)  /\  X  e.  ( K `  G ) )  ->  X  e.  V )
873impa 1259 1  |-  ( ( W  e.  Y  /\  G  e.  F  /\  X  e.  ( K `  G ) )  ->  X  e.  V )
Colors of variables: wff setvar class
Syntax hints:    -> wi 4    /\ wa 384    /\ w3a 1037    = wceq 1483    e. wcel 1990   ` cfv 5888   Basecbs 15857  Scalarcsca 15944   0gc0g 16100  LFnlclfn 34344  LKerclk 34372
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-rep 4771  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-ral 2917  df-rex 2918  df-reu 2919  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-op 4184  df-uni 4437  df-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  df-id 5024  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-map 7859  df-lfl 34345  df-lkr 34373
This theorem is referenced by:  lkrlss  34382  lkrin  34451
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