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Theorem rrgeq0 14683
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 14682 . . 3  |-  ( ( X  e.  E  /\  Y  e.  B )  ->  ( ( X  .x.  Y )  =  .0. 
->  Y  =  .0.  ) )
653adant1 1046 . 2  |-  ( ( R  e.  Ring  /\  X  e.  E  /\  Y  e.  B )  ->  (
( X  .x.  Y
)  =  .0.  ->  Y  =  .0.  ) )
7 simp1 1028 . . . 4  |-  ( ( R  e.  Ring  /\  X  e.  E  /\  Y  e.  B )  ->  R  e.  Ring )
81, 2, 3, 4rrgval 14680 . . . . . 6  |-  E  =  { x  e.  B  |  A. y  e.  B  ( ( x  .x.  y )  =  .0. 
->  y  =  .0.  ) }
98ssrab3 3334 . . . . 5  |-  E  C_  B
10 simp2 1029 . . . . 5  |-  ( ( R  e.  Ring  /\  X  e.  E  /\  Y  e.  B )  ->  X  e.  E )
119, 10sselid 3246 . . . 4  |-  ( ( R  e.  Ring  /\  X  e.  E  /\  Y  e.  B )  ->  X  e.  B )
122, 3, 4ringrz 14457 . . . 4  |-  ( ( R  e.  Ring  /\  X  e.  B )  ->  ( X  .x.  .0.  )  =  .0.  )
137, 11, 12syl2anc 415 . . 3  |-  ( ( R  e.  Ring  /\  X  e.  E  /\  Y  e.  B )  ->  ( X  .x.  .0.  )  =  .0.  )
14 oveq2 6096 . . . 4  |-  ( Y  =  .0.  ->  ( X  .x.  Y )  =  ( X  .x.  .0.  ) )
1514eqeq1d 2247 . . 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
This proof depends on syntax axioms:    -> wi 4    <-> wb 105    /\ w3a 1009    = wceq 1402    e. wcel 2209   A.wral 2528   ` cfv 5380  (class class class)co 6088   Basecbs 13411   .rcmulr 13492   0gc0g 13670   Ringcrg 14408  RLRegcrlreg 14673
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 623  ax-in2 624  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 4251  ax-pow 4313  ax-pr 4348  ax-un 4580  ax-setind 4686  ax-cnex 8277  ax-resscn 8278  ax-1cn 8279  ax-1re 8280  ax-icn 8281  ax-addcl 8282  ax-addrcl 8283  ax-mulcl 8284  ax-addcom 8286  ax-addass 8288  ax-i2m1 8291  ax-0lt1 8292  ax-0id 8294  ax-rnegex 8295  ax-pre-ltirr 8298  ax-pre-ltadd 8302
This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-fal 1408  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-ne 2421  df-nel 2516  df-ral 2533  df-rex 2534  df-reu 2535  df-rmo 2536  df-rab 2537  df-v 2823  df-sbc 3052  df-csb 3148  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-nul 3521  df-pw 3690  df-sn 3715  df-pr 3716  df-op 3718  df-uni 3936  df-int 3971  df-br 4132  df-opab 4194  df-mpt 4195  df-id 4440  df-xp 4782  df-rel 4783  df-cnv 4784  df-co 4785  df-dm 4786  df-rn 4787  df-res 4788  df-iota 5340  df-fun 5382  df-fn 5383  df-fv 5388  df-riota 6041  df-ov 6091  df-oprab 6092  df-mpo 6093  df-pnf 8369  df-mnf 8370  df-ltxr 8372  df-inn 9315  df-2 9373  df-3 9374  df-ndx 13414  df-slot 13415  df-base 13417  df-sets 13418  df-plusg 13504  df-mulr 13505  df-0g 13672  df-mgm 13736  df-sgrp 13777  df-mnd 13790  df-grp 13868  df-mgp 14326  df-ring 14410  df-rlreg 14676
This theorem is used by:  rrgsupp  14684  rrgnz  14687
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