Theorem rrgeq0 14402

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 14401	. . 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 14399	. . . . . 6 |- E = { x e. B | A. y e. B ( ( x .x. y ) = .0. -> y = .0. ) }
9	8	ssrab3 3323	. . . . 5 |- E C_ B
10		simp2 1025	. . . . 5 |- ( ( R e. Ring /\ X e. E /\ Y e. B ) -> X e. E )
11	9, 10	sselid 3235	. . . 4 |- ( ( R e. Ring /\ X e. E /\ Y e. B ) -> X e. B )
12	2, 3, 4	ringrz 14180	. . . 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 6057	. . . 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 5351  (class class class)co 6049   Basecbs 13204   .rcmulr 13283   0gc0g 13461   Ringcrg 14132  RLRegcrlreg 14392

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 4227  ax-pow 4286  ax-pr 4321  ax-un 4553  ax-setind 4658  ax-cnex 8217  ax-resscn 8218  ax-1cn 8219  ax-1re 8220  ax-icn 8221  ax-addcl 8222  ax-addrcl 8223  ax-mulcl 8224  ax-addcom 8226  ax-addass 8228  ax-i2m1 8231  ax-0lt1 8232  ax-0id 8234  ax-rnegex 8235  ax-pre-ltirr 8238  ax-pre-ltadd 8242

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 2814  df-sbc 3042  df-csb 3138  df-dif 3212  df-un 3214  df-in 3216  df-ss 3223  df-nul 3508  df-pw 3670  df-sn 3694  df-pr 3695  df-op 3697  df-uni 3914  df-int 3949  df-br 4109  df-opab 4171  df-mpt 4172  df-id 4413  df-xp 4754  df-rel 4755  df-cnv 4756  df-co 4757  df-dm 4758  df-rn 4759  df-res 4760  df-iota 5311  df-fun 5353  df-fn 5354  df-fv 5359  df-riota 6002  df-ov 6052  df-oprab 6053  df-mpo 6054  df-pnf 8309  df-mnf 8310  df-ltxr 8312  df-inn 9237  df-2 9295  df-3 9296  df-ndx 13207  df-slot 13208  df-base 13210  df-sets 13211  df-plusg 13295  df-mulr 13296  df-0g 13463  df-mgm 13561  df-sgrp 13607  df-mnd 13622  df-grp 13708  df-mgp 14057  df-ring 14134  df-rlreg 14395

This theorem is referenced by:  rrgsupp  14403  rrgnz  14406