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Theorem rrgeq0 14097
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 14096 . . 3  |-  ( ( X  e.  E  /\  Y  e.  B )  ->  ( ( X  .x.  Y )  =  .0. 
->  Y  =  .0.  ) )
653adant1 1018 . 2  |-  ( ( R  e.  Ring  /\  X  e.  E  /\  Y  e.  B )  ->  (
( X  .x.  Y
)  =  .0.  ->  Y  =  .0.  ) )
7 simp1 1000 . . . 4  |-  ( ( R  e.  Ring  /\  X  e.  E  /\  Y  e.  B )  ->  R  e.  Ring )
81, 2, 3, 4rrgval 14094 . . . . . 6  |-  E  =  { x  e.  B  |  A. y  e.  B  ( ( x  .x.  y )  =  .0. 
->  y  =  .0.  ) }
98ssrab3 3283 . . . . 5  |-  E  C_  B
10 simp2 1001 . . . . 5  |-  ( ( R  e.  Ring  /\  X  e.  E  /\  Y  e.  B )  ->  X  e.  E )
119, 10sselid 3195 . . . 4  |-  ( ( R  e.  Ring  /\  X  e.  E  /\  Y  e.  B )  ->  X  e.  B )
122, 3, 4ringrz 13876 . . . 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 5964 . . . 4  |-  ( Y  =  .0.  ->  ( X  .x.  Y )  =  ( X  .x.  .0.  ) )
1514eqeq1d 2215 . . 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 981    = wceq 1373    e. wcel 2177   A.wral 2485   ` cfv 5279  (class class class)co 5956   Basecbs 12902   .rcmulr 12980   0gc0g 13158   Ringcrg 13828  RLRegcrlreg 14087
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 615  ax-in2 616  ax-io 711  ax-5 1471  ax-7 1472  ax-gen 1473  ax-ie1 1517  ax-ie2 1518  ax-8 1528  ax-10 1529  ax-11 1530  ax-i12 1531  ax-bndl 1533  ax-4 1534  ax-17 1550  ax-i9 1554  ax-ial 1558  ax-i5r 1559  ax-13 2179  ax-14 2180  ax-ext 2188  ax-sep 4169  ax-pow 4225  ax-pr 4260  ax-un 4487  ax-setind 4592  ax-cnex 8031  ax-resscn 8032  ax-1cn 8033  ax-1re 8034  ax-icn 8035  ax-addcl 8036  ax-addrcl 8037  ax-mulcl 8038  ax-addcom 8040  ax-addass 8042  ax-i2m1 8045  ax-0lt1 8046  ax-0id 8048  ax-rnegex 8049  ax-pre-ltirr 8052  ax-pre-ltadd 8056
This theorem depends on definitions:  df-bi 117  df-3an 983  df-tru 1376  df-fal 1379  df-nf 1485  df-sb 1787  df-eu 2058  df-mo 2059  df-clab 2193  df-cleq 2199  df-clel 2202  df-nfc 2338  df-ne 2378  df-nel 2473  df-ral 2490  df-rex 2491  df-reu 2492  df-rmo 2493  df-rab 2494  df-v 2775  df-sbc 3003  df-csb 3098  df-dif 3172  df-un 3174  df-in 3176  df-ss 3183  df-nul 3465  df-pw 3622  df-sn 3643  df-pr 3644  df-op 3646  df-uni 3856  df-int 3891  df-br 4051  df-opab 4113  df-mpt 4114  df-id 4347  df-xp 4688  df-rel 4689  df-cnv 4690  df-co 4691  df-dm 4692  df-rn 4693  df-res 4694  df-iota 5240  df-fun 5281  df-fn 5282  df-fv 5287  df-riota 5911  df-ov 5959  df-oprab 5960  df-mpo 5961  df-pnf 8124  df-mnf 8125  df-ltxr 8127  df-inn 9052  df-2 9110  df-3 9111  df-ndx 12905  df-slot 12906  df-base 12908  df-sets 12909  df-plusg 12992  df-mulr 12993  df-0g 13160  df-mgm 13258  df-sgrp 13304  df-mnd 13319  df-grp 13405  df-mgp 13753  df-ring 13830  df-rlreg 14090
This theorem is referenced by:  rrgnz  14100
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