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Theorem lmod0vs 15938
Description: Zero times a vector is the zero vector. Equation 1a of [Kreyszig] p. 51. (ax-hvmul0 22466 analog.) (Contributed by NM, 12-Jan-2014.) (Revised by Mario Carneiro, 19-Jun-2014.)
Hypotheses
Ref Expression
lmod0vs.v  |-  V  =  ( Base `  W
)
lmod0vs.f  |-  F  =  (Scalar `  W )
lmod0vs.s  |-  .x.  =  ( .s `  W )
lmod0vs.o  |-  O  =  ( 0g `  F
)
lmod0vs.z  |-  .0.  =  ( 0g `  W )
Assertion
Ref Expression
lmod0vs  |-  ( ( W  e.  LMod  /\  X  e.  V )  ->  ( O  .x.  X )  =  .0.  )

Proof of Theorem lmod0vs
StepHypRef Expression
1 simpl 444 . . . . 5  |-  ( ( W  e.  LMod  /\  X  e.  V )  ->  W  e.  LMod )
2 lmod0vs.f . . . . . . . 8  |-  F  =  (Scalar `  W )
32lmodrng 15913 . . . . . . 7  |-  ( W  e.  LMod  ->  F  e. 
Ring )
43adantr 452 . . . . . 6  |-  ( ( W  e.  LMod  /\  X  e.  V )  ->  F  e.  Ring )
5 eqid 2404 . . . . . . 7  |-  ( Base `  F )  =  (
Base `  F )
6 lmod0vs.o . . . . . . 7  |-  O  =  ( 0g `  F
)
75, 6rng0cl 15640 . . . . . 6  |-  ( F  e.  Ring  ->  O  e.  ( Base `  F
) )
84, 7syl 16 . . . . 5  |-  ( ( W  e.  LMod  /\  X  e.  V )  ->  O  e.  ( Base `  F
) )
9 simpr 448 . . . . 5  |-  ( ( W  e.  LMod  /\  X  e.  V )  ->  X  e.  V )
10 lmod0vs.v . . . . . 6  |-  V  =  ( Base `  W
)
11 eqid 2404 . . . . . 6  |-  ( +g  `  W )  =  ( +g  `  W )
12 lmod0vs.s . . . . . 6  |-  .x.  =  ( .s `  W )
13 eqid 2404 . . . . . 6  |-  ( +g  `  F )  =  ( +g  `  F )
1410, 11, 2, 12, 5, 13lmodvsdir 15929 . . . . 5  |-  ( ( W  e.  LMod  /\  ( O  e.  ( Base `  F )  /\  O  e.  ( Base `  F
)  /\  X  e.  V ) )  -> 
( ( O ( +g  `  F ) O )  .x.  X
)  =  ( ( O  .x.  X ) ( +g  `  W
) ( O  .x.  X ) ) )
151, 8, 8, 9, 14syl13anc 1186 . . . 4  |-  ( ( W  e.  LMod  /\  X  e.  V )  ->  (
( O ( +g  `  F ) O ) 
.x.  X )  =  ( ( O  .x.  X ) ( +g  `  W ) ( O 
.x.  X ) ) )
16 rnggrp 15624 . . . . . . 7  |-  ( F  e.  Ring  ->  F  e. 
Grp )
174, 16syl 16 . . . . . 6  |-  ( ( W  e.  LMod  /\  X  e.  V )  ->  F  e.  Grp )
185, 13, 6grplid 14790 . . . . . 6  |-  ( ( F  e.  Grp  /\  O  e.  ( Base `  F ) )  -> 
( O ( +g  `  F ) O )  =  O )
1917, 8, 18syl2anc 643 . . . . 5  |-  ( ( W  e.  LMod  /\  X  e.  V )  ->  ( O ( +g  `  F
) O )  =  O )
2019oveq1d 6055 . . . 4  |-  ( ( W  e.  LMod  /\  X  e.  V )  ->  (
( O ( +g  `  F ) O ) 
.x.  X )  =  ( O  .x.  X
) )
2115, 20eqtr3d 2438 . . 3  |-  ( ( W  e.  LMod  /\  X  e.  V )  ->  (
( O  .x.  X
) ( +g  `  W
) ( O  .x.  X ) )  =  ( O  .x.  X
) )
2210, 2, 12, 5lmodvscl 15922 . . . . 5  |-  ( ( W  e.  LMod  /\  O  e.  ( Base `  F
)  /\  X  e.  V )  ->  ( O  .x.  X )  e.  V )
231, 8, 9, 22syl3anc 1184 . . . 4  |-  ( ( W  e.  LMod  /\  X  e.  V )  ->  ( O  .x.  X )  e.  V )
24 lmod0vs.z . . . . 5  |-  .0.  =  ( 0g `  W )
2510, 11, 24lmod0vid 15937 . . . 4  |-  ( ( W  e.  LMod  /\  ( O  .x.  X )  e.  V )  ->  (
( ( O  .x.  X ) ( +g  `  W ) ( O 
.x.  X ) )  =  ( O  .x.  X )  <->  .0.  =  ( O  .x.  X ) ) )
2623, 25syldan 457 . . 3  |-  ( ( W  e.  LMod  /\  X  e.  V )  ->  (
( ( O  .x.  X ) ( +g  `  W ) ( O 
.x.  X ) )  =  ( O  .x.  X )  <->  .0.  =  ( O  .x.  X ) ) )
2721, 26mpbid 202 . 2  |-  ( ( W  e.  LMod  /\  X  e.  V )  ->  .0.  =  ( O  .x.  X ) )
2827eqcomd 2409 1  |-  ( ( W  e.  LMod  /\  X  e.  V )  ->  ( O  .x.  X )  =  .0.  )
Colors of variables: wff set class
Syntax hints:    -> wi 4    <-> wb 177    /\ wa 359    = wceq 1649    e. wcel 1721   ` cfv 5413  (class class class)co 6040   Basecbs 13424   +g cplusg 13484  Scalarcsca 13487   .scvsca 13488   0gc0g 13678   Grpcgrp 14640   Ringcrg 15615   LModclmod 15905
This theorem is referenced by:  lmodvs0  15939  lmodvneg1  15942  lvecvs0or  16135  lssvs0or  16137  lspsneleq  16142  lspdisj  16152  lspfixed  16155  lspexch  16156  lspsolvlem  16169  lspsolv  16170  mplcoe1  16483  mplbas2  16486  ply1scl0  16636  ply1coe  16639  clm0vs  19068  plypf1  20084  lcomfsup  26637  uvcresum  27110  frlmsslsp  27116  frlmup1  27118  frlmup2  27119  lshpkrlem1  29593  ldual0vs  29643  lclkrlem1  31989  lcd0vs  32098  baerlem3lem1  32190  baerlem5blem1  32192  hdmap14lem2a  32353  hdmap14lem4a  32357  hdmap14lem6  32359  hgmapval0  32378
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1552  ax-5 1563  ax-17 1623  ax-9 1662  ax-8 1683  ax-13 1723  ax-14 1725  ax-6 1740  ax-7 1745  ax-11 1757  ax-12 1946  ax-ext 2385  ax-sep 4290  ax-nul 4298  ax-pow 4337  ax-pr 4363
This theorem depends on definitions:  df-bi 178  df-or 360  df-an 361  df-3an 938  df-tru 1325  df-ex 1548  df-nf 1551  df-sb 1656  df-eu 2258  df-mo 2259  df-clab 2391  df-cleq 2397  df-clel 2400  df-nfc 2529  df-ne 2569  df-ral 2671  df-rex 2672  df-reu 2673  df-rmo 2674  df-rab 2675  df-v 2918  df-sbc 3122  df-dif 3283  df-un 3285  df-in 3287  df-ss 3294  df-nul 3589  df-if 3700  df-sn 3780  df-pr 3781  df-op 3783  df-uni 3976  df-br 4173  df-opab 4227  df-mpt 4228  df-id 4458  df-xp 4843  df-rel 4844  df-cnv 4845  df-co 4846  df-dm 4847  df-iota 5377  df-fun 5415  df-fv 5421  df-ov 6043  df-riota 6508  df-0g 13682  df-mnd 14645  df-grp 14767  df-rng 15618  df-lmod 15907
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