Theorem rrgeq0 14285

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 14284	. . 3 |- ( ( X e. E /\ Y e. B ) -> ( ( X .x. Y ) = .0. -> Y = .0. ) )
6	5	3adant1 1041	. 2 |- ( ( R e. Ring /\ X e. E /\ Y e. B ) -> ( ( X .x. Y ) = .0. -> Y = .0. ) )
7		simp1 1023	. . . 4 |- ( ( R e. Ring /\ X e. E /\ Y e. B ) -> R e. Ring )
8	1, 2, 3, 4	rrgval 14282	. . . . . 6 |- E = { x e. B | A. y e. B ( ( x .x. y ) = .0. -> y = .0. ) }
9	8	ssrab3 3313	. . . . 5 |- E C_ B
10		simp2 1024	. . . . 5 |- ( ( R e. Ring /\ X e. E /\ Y e. B ) -> X e. E )
11	9, 10	sselid 3225	. . . 4 |- ( ( R e. Ring /\ X e. E /\ Y e. B ) -> X e. B )
12	2, 3, 4	ringrz 14063	. . . 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 6026	. . . 4 |- ( Y = .0. -> ( X .x. Y ) = ( X .x. .0. ) )
15	14	eqeq1d 2240	. . 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 1004   = wceq 1397   e. wcel 2202   A.wral 2510   ` cfv 5326  (class class class)co 6018   Basecbs 13087   .rcmulr 13166   0gc0g 13344   Ringcrg 14015  RLRegcrlreg 14275

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 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2204  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-pow 4264  ax-pr 4299  ax-un 4530  ax-setind 4635  ax-cnex 8123  ax-resscn 8124  ax-1cn 8125  ax-1re 8126  ax-icn 8127  ax-addcl 8128  ax-addrcl 8129  ax-mulcl 8130  ax-addcom 8132  ax-addass 8134  ax-i2m1 8137  ax-0lt1 8138  ax-0id 8140  ax-rnegex 8141  ax-pre-ltirr 8144  ax-pre-ltadd 8148

This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-fal 1403  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ne 2403  df-nel 2498  df-ral 2515  df-rex 2516  df-reu 2517  df-rmo 2518  df-rab 2519  df-v 2804  df-sbc 3032  df-csb 3128  df-dif 3202  df-un 3204  df-in 3206  df-ss 3213  df-nul 3495  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-int 3929  df-br 4089  df-opab 4151  df-mpt 4152  df-id 4390  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-rn 4736  df-res 4737  df-iota 5286  df-fun 5328  df-fn 5329  df-fv 5334  df-riota 5971  df-ov 6021  df-oprab 6022  df-mpo 6023  df-pnf 8216  df-mnf 8217  df-ltxr 8219  df-inn 9144  df-2 9202  df-3 9203  df-ndx 13090  df-slot 13091  df-base 13093  df-sets 13094  df-plusg 13178  df-mulr 13179  df-0g 13346  df-mgm 13444  df-sgrp 13490  df-mnd 13505  df-grp 13591  df-mgp 13940  df-ring 14017  df-rlreg 14278

This theorem is referenced by:  rrgnz  14288