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Theorem rrgeq0 14237
Description: Left-multiplication by a left regular element does not change zeroness. (Contributed by Stefan O'Rear, 28-Mar-2015.)
Hypotheses
Ref Expression
rrgval.e  |-  E  =  (RLReg `  R )
rrgval.b  |-  B  =  ( Base `  R
)
rrgval.t  |-  .x.  =  ( .r `  R )
rrgval.z  |-  .0.  =  ( 0g `  R )
Assertion
Ref Expression
rrgeq0  |-  ( ( R  e.  Ring  /\  X  e.  E  /\  Y  e.  B )  ->  (
( X  .x.  Y
)  =  .0.  <->  Y  =  .0.  ) )

Proof of Theorem rrgeq0
Dummy variables  x  y are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 rrgval.e . . . 4  |-  E  =  (RLReg `  R )
2 rrgval.b . . . 4  |-  B  =  ( Base `  R
)
3 rrgval.t . . . 4  |-  .x.  =  ( .r `  R )
4 rrgval.z . . . 4  |-  .0.  =  ( 0g `  R )
51, 2, 3, 4rrgeq0i 14236 . . 3  |-  ( ( X  e.  E  /\  Y  e.  B )  ->  ( ( X  .x.  Y )  =  .0. 
->  Y  =  .0.  ) )
653adant1 1039 . 2  |-  ( ( R  e.  Ring  /\  X  e.  E  /\  Y  e.  B )  ->  (
( X  .x.  Y
)  =  .0.  ->  Y  =  .0.  ) )
7 simp1 1021 . . . 4  |-  ( ( R  e.  Ring  /\  X  e.  E  /\  Y  e.  B )  ->  R  e.  Ring )
81, 2, 3, 4rrgval 14234 . . . . . 6  |-  E  =  { x  e.  B  |  A. y  e.  B  ( ( x  .x.  y )  =  .0. 
->  y  =  .0.  ) }
98ssrab3 3310 . . . . 5  |-  E  C_  B
10 simp2 1022 . . . . 5  |-  ( ( R  e.  Ring  /\  X  e.  E  /\  Y  e.  B )  ->  X  e.  E )
119, 10sselid 3222 . . . 4  |-  ( ( R  e.  Ring  /\  X  e.  E  /\  Y  e.  B )  ->  X  e.  B )
122, 3, 4ringrz 14015 . . . 4  |-  ( ( R  e.  Ring  /\  X  e.  B )  ->  ( X  .x.  .0.  )  =  .0.  )
137, 11, 12syl2anc 411 . . 3  |-  ( ( R  e.  Ring  /\  X  e.  E  /\  Y  e.  B )  ->  ( X  .x.  .0.  )  =  .0.  )
14 oveq2 6015 . . . 4  |-  ( Y  =  .0.  ->  ( X  .x.  Y )  =  ( X  .x.  .0.  ) )
1514eqeq1d 2238 . . 3  |-  ( Y  =  .0.  ->  (
( X  .x.  Y
)  =  .0.  <->  ( X  .x.  .0.  )  =  .0.  ) )
1613, 15syl5ibrcom 157 . 2  |-  ( ( R  e.  Ring  /\  X  e.  E  /\  Y  e.  B )  ->  ( Y  =  .0.  ->  ( X  .x.  Y )  =  .0.  ) )
176, 16impbid 129 1  |-  ( ( R  e.  Ring  /\  X  e.  E  /\  Y  e.  B )  ->  (
( X  .x.  Y
)  =  .0.  <->  Y  =  .0.  ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    <-> wb 105    /\ w3a 1002    = wceq 1395    e. wcel 2200   A.wral 2508   ` cfv 5318  (class class class)co 6007   Basecbs 13040   .rcmulr 13119   0gc0g 13297   Ringcrg 13967  RLRegcrlreg 14227
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-in1 617  ax-in2 618  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-sep 4202  ax-pow 4258  ax-pr 4293  ax-un 4524  ax-setind 4629  ax-cnex 8098  ax-resscn 8099  ax-1cn 8100  ax-1re 8101  ax-icn 8102  ax-addcl 8103  ax-addrcl 8104  ax-mulcl 8105  ax-addcom 8107  ax-addass 8109  ax-i2m1 8112  ax-0lt1 8113  ax-0id 8115  ax-rnegex 8116  ax-pre-ltirr 8119  ax-pre-ltadd 8123
This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-fal 1401  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ne 2401  df-nel 2496  df-ral 2513  df-rex 2514  df-reu 2515  df-rmo 2516  df-rab 2517  df-v 2801  df-sbc 3029  df-csb 3125  df-dif 3199  df-un 3201  df-in 3203  df-ss 3210  df-nul 3492  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3889  df-int 3924  df-br 4084  df-opab 4146  df-mpt 4147  df-id 4384  df-xp 4725  df-rel 4726  df-cnv 4727  df-co 4728  df-dm 4729  df-rn 4730  df-res 4731  df-iota 5278  df-fun 5320  df-fn 5321  df-fv 5326  df-riota 5960  df-ov 6010  df-oprab 6011  df-mpo 6012  df-pnf 8191  df-mnf 8192  df-ltxr 8194  df-inn 9119  df-2 9177  df-3 9178  df-ndx 13043  df-slot 13044  df-base 13046  df-sets 13047  df-plusg 13131  df-mulr 13132  df-0g 13299  df-mgm 13397  df-sgrp 13443  df-mnd 13458  df-grp 13544  df-mgp 13892  df-ring 13969  df-rlreg 14230
This theorem is referenced by:  rrgnz  14240
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