Theorem rrgeq0 14410

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.

Step	Hyp	Ref	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 )
5	1, 2, 3, 4	rrgeq0i 14409	. . 3 |- ( ( X e. E /\ Y e. B ) -> ( ( X .x. Y ) = .0. -> Y = .0. ) )
6	5	3adant1 1042	. 2 |- ( ( R e. Ring /\ X e. E /\ Y e. B ) -> ( ( X .x. Y ) = .0. -> Y = .0. ) )
7		simp1 1024	. . . 4 |- ( ( R e. Ring /\ X e. E /\ Y e. B ) -> R e. Ring )
8	1, 2, 3, 4	rrgval 14407	. . . . . 6 |- E = { x e. B | A. y e. B ( ( x .x. y ) = .0. -> y = .0. ) }
9	8	ssrab3 3324	. . . . 5 |- E C_ B
10		simp2 1025	. . . . 5 |- ( ( R e. Ring /\ X e. E /\ Y e. B ) -> X e. E )
11	9, 10	sselid 3236	. . . 4 |- ( ( R e. Ring /\ X e. E /\ Y e. B ) -> X e. B )
12	2, 3, 4	ringrz 14188	. . . 4 |- ( ( R e. Ring /\ X e. B ) -> ( X .x. .0. ) = .0. )
13	7, 11, 12	syl2anc 411	. . 3 |- ( ( R e. Ring /\ X e. E /\ Y e. B ) -> ( X .x. .0. ) = .0. )
14		oveq2 6058	. . . 4 |- ( Y = .0. -> ( X .x. Y ) = ( X .x. .0. ) )
15	14	eqeq1d 2241	. . 3 |- ( Y = .0. -> ( ( X .x. Y ) = .0. <-> ( X .x. .0. ) = .0. ) )
16	13, 15	syl5ibrcom 157	. 2 |- ( ( R e. Ring /\ X e. E /\ Y e. B ) -> ( Y = .0. -> ( X .x. Y ) = .0. ) )
17	6, 16	impbid 129	1 |- ( ( R e. Ring /\ X e. E /\ Y e. B ) -> ( ( X .x. Y ) = .0. <-> Y = .0. ) )

Syntax hints:   -> wi 4   <-> wb 105   /\ w3a 1005   = wceq 1398   e. wcel 2203   A.wral 2520   ` cfv 5352  (class class class)co 6050   Basecbs 13212   .rcmulr 13291   0gc0g 13469   Ringcrg 14140  RLRegcrlreg 14400

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 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2205  ax-14 2206  ax-ext 2214  ax-sep 4228  ax-pow 4287  ax-pr 4322  ax-un 4554  ax-setind 4659  ax-cnex 8218  ax-resscn 8219  ax-1cn 8220  ax-1re 8221  ax-icn 8222  ax-addcl 8223  ax-addrcl 8224  ax-mulcl 8225  ax-addcom 8227  ax-addass 8229  ax-i2m1 8232  ax-0lt1 8233  ax-0id 8235  ax-rnegex 8236  ax-pre-ltirr 8239  ax-pre-ltadd 8243

This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1812  df-eu 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ne 2413  df-nel 2508  df-ral 2525  df-rex 2526  df-reu 2527  df-rmo 2528  df-rab 2529  df-v 2815  df-sbc 3043  df-csb 3139  df-dif 3213  df-un 3215  df-in 3217  df-ss 3224  df-nul 3509  df-pw 3671  df-sn 3695  df-pr 3696  df-op 3698  df-uni 3915  df-int 3950  df-br 4110  df-opab 4172  df-mpt 4173  df-id 4414  df-xp 4755  df-rel 4756  df-cnv 4757  df-co 4758  df-dm 4759  df-rn 4760  df-res 4761  df-iota 5312  df-fun 5354  df-fn 5355  df-fv 5360  df-riota 6003  df-ov 6053  df-oprab 6054  df-mpo 6055  df-pnf 8310  df-mnf 8311  df-ltxr 8313  df-inn 9238  df-2 9296  df-3 9297  df-ndx 13215  df-slot 13216  df-base 13218  df-sets 13219  df-plusg 13303  df-mulr 13304  df-0g 13471  df-mgm 13569  df-sgrp 13615  df-mnd 13630  df-grp 13716  df-mgp 14065  df-ring 14142  df-rlreg 14403

This theorem is referenced by:  rrgsupp  14411  rrgnz  14414