Theorem opprlring 14364

Description: The opposite of a local ring is also a local ring. (Contributed by NM, 18-Oct-2014.)

Hypothesis

Ref	Expression
opprlring.1	|- O = (oppr ` R )

Assertion

Ref	Expression
opprlring	|- ( R e. LRing <-> O e. LRing )

Proof of Theorem opprlring

Dummy variables x y are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		lringring 14361	. 2 |- ( R e. LRing -> R e. Ring )
2		lringring 14361	. . 3 |- ( O e. LRing -> O e. Ring )
3		opprlring.1	. . . 4 |- O = (oppr ` R )
4	3	opprringb 14246	. . 3 |- ( R e. Ring <-> O e. Ring )
5	2, 4	sylibr 134	. 2 |- ( O e. LRing -> R e. Ring )
6	3	opprnzrbg 14352	. . . 4 |- ( R e. Ring -> ( R e. NzRing <-> O e. NzRing ) )
7		eqid 2234	. . . . . 6 |- ( Base ` R ) = ( Base ` R )
8	3, 7	opprbasg 14240	. . . . 5 |- ( R e. Ring -> ( Base ` R ) = ( Base ` O ) )
9		eqid 2234	. . . . . . . . . 10 |- ( +g ` R ) = ( +g ` R )
10	3, 9	oppraddg 14241	. . . . . . . . 9 |- ( R e. Ring -> ( +g ` R ) = ( +g ` O ) )
11	10	oveqd 6069	. . . . . . . 8 |- ( R e. Ring -> ( x ( +g ` R ) y ) = ( x ( +g ` O ) y ) )
12		eqid 2234	. . . . . . . . 9 |- ( 1r ` R ) = ( 1r ` R )
13	3, 12	oppr1g 14248	. . . . . . . 8 |- ( R e. Ring -> ( 1r ` R ) = ( 1r ` O ) )
14	11, 13	eqeq12d 2249	. . . . . . 7 |- ( R e. Ring -> ( ( x ( +g ` R ) y ) = ( 1r ` R ) <-> ( x ( +g ` O ) y ) = ( 1r ` O ) ) )
15		eqidd 2235	. . . . . . . . . 10 |- ( R e. Ring -> (Unit ` R ) = (Unit ` R ) )
16	3	a1i 9	. . . . . . . . . 10 |- ( R e. Ring -> O = (oppr ` R ) )
17		id 19	. . . . . . . . . 10 |- ( R e. Ring -> R e. Ring )
18	15, 16, 17	opprunitd 14277	. . . . . . . . 9 |- ( R e. Ring -> (Unit ` R ) = (Unit ` O ) )
19	18	eleq2d 2304	. . . . . . . 8 |- ( R e. Ring -> ( x e. (Unit ` R ) <-> x e. (Unit ` O ) ) )
20	18	eleq2d 2304	. . . . . . . 8 |- ( R e. Ring -> ( y e. (Unit ` R ) <-> y e. (Unit ` O ) ) )
21	19, 20	orbi12d 801	. . . . . . 7 |- ( R e. Ring -> ( ( x e. (Unit ` R ) \/ y e. (Unit ` R ) ) <-> ( x e. (Unit ` O ) \/ y e. (Unit ` O ) ) ) )
22	14, 21	imbi12d 234	. . . . . 6 |- ( R e. Ring -> ( ( ( x ( +g ` R ) y ) = ( 1r ` R ) -> ( x e. (Unit ` R ) \/ y e. (Unit ` R ) ) ) <-> ( ( x ( +g ` O ) y ) = ( 1r ` O ) -> ( x e. (Unit ` O ) \/ y e. (Unit ` O ) ) ) ) )
23	8, 22	raleqbidv 2759	. . . . 5 |- ( R e. Ring -> ( A. y e. ( Base ` R ) ( ( x ( +g ` R ) y ) = ( 1r ` R ) -> ( x e. (Unit ` R ) \/ y e. (Unit ` R ) ) ) <-> A. y e. ( Base ` O ) ( ( x ( +g ` O ) y ) = ( 1r ` O ) -> ( x e. (Unit ` O ) \/ y e. (Unit ` O ) ) ) ) )
24	8, 23	raleqbidv 2759	. . . 4 |- ( R e. Ring -> ( A. x e. ( Base ` R ) A. y e. ( Base ` R ) ( ( x ( +g ` R ) y ) = ( 1r ` R ) -> ( x e. (Unit ` R ) \/ y e. (Unit ` R ) ) ) <-> A. x e. ( Base ` O ) A. y e. ( Base ` O ) ( ( x ( +g ` O ) y ) = ( 1r ` O ) -> ( x e. (Unit ` O ) \/ y e. (Unit ` O ) ) ) ) )
25	6, 24	anbi12d 473	. . 3 |- ( R e. Ring -> ( ( R e. NzRing /\ A. x e. ( Base ` R ) A. y e. ( Base ` R ) ( ( x ( +g ` R ) y ) = ( 1r ` R ) -> ( x e. (Unit ` R ) \/ y e. (Unit ` R ) ) ) ) <-> ( O e. NzRing /\ A. x e. ( Base ` O ) A. y e. ( Base ` O ) ( ( x ( +g ` O ) y ) = ( 1r ` O ) -> ( x e. (Unit ` O ) \/ y e. (Unit ` O ) ) ) ) ) )
26		eqid 2234	. . . 4 |- (Unit ` R ) = (Unit ` R )
27	7, 9, 12, 26	islring 14359	. . 3 |- ( R e. LRing <-> ( R e. NzRing /\ A. x e. ( Base ` R ) A. y e. ( Base ` R ) ( ( x ( +g ` R ) y ) = ( 1r ` R ) -> ( x e. (Unit ` R ) \/ y e. (Unit ` R ) ) ) ) )
28		eqid 2234	. . . 4 |- ( Base ` O ) = ( Base ` O )
29		eqid 2234	. . . 4 |- ( +g ` O ) = ( +g ` O )
30		eqid 2234	. . . 4 |- ( 1r ` O ) = ( 1r ` O )
31		eqid 2234	. . . 4 |- (Unit ` O ) = (Unit ` O )
32	28, 29, 30, 31	islring 14359	. . 3 |- ( O e. LRing <-> ( O e. NzRing /\ A. x e. ( Base ` O ) A. y e. ( Base ` O ) ( ( x ( +g ` O ) y ) = ( 1r ` O ) -> ( x e. (Unit ` O ) \/ y e. (Unit ` O ) ) ) ) )
33	25, 27, 32	3bitr4g 223	. 2 |- ( R e. Ring -> ( R e. LRing <-> O e. LRing ) )
34	1, 5, 33	pm5.21nii 712	1 |- ( R e. LRing <-> O e. LRing )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   \/ wo 716   = wceq 1398   e. wcel 2205   A.wral 2522   ` cfv 5354  (class class class)co 6052   Basecbs 13233   +g cplusg 13311   1rcur 14124   Ringcrg 14161  opp_rcoppr 14232  Unitcui 14253  NzRingcnzr 14346  LRingclring 14357

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 2207  ax-14 2208  ax-ext 2216  ax-coll 4227  ax-sep 4230  ax-nul 4238  ax-pow 4289  ax-pr 4324  ax-un 4556  ax-setind 4661  ax-cnex 8223  ax-resscn 8224  ax-1cn 8225  ax-1re 8226  ax-icn 8227  ax-addcl 8228  ax-addrcl 8229  ax-mulcl 8230  ax-addcom 8232  ax-addass 8234  ax-i2m1 8237  ax-0lt1 8238  ax-0id 8240  ax-rnegex 8241  ax-pre-ltirr 8244  ax-pre-lttrn 8246  ax-pre-ltadd 8248

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 2085  df-mo 2086  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ne 2415  df-nel 2510  df-ral 2527  df-rex 2528  df-reu 2529  df-rmo 2530  df-rab 2531  df-v 2817  df-sbc 3045  df-csb 3141  df-dif 3215  df-un 3217  df-in 3219  df-ss 3226  df-nul 3511  df-pw 3673  df-sn 3697  df-pr 3698  df-op 3700  df-uni 3917  df-int 3952  df-iun 3995  df-br 4112  df-opab 4174  df-mpt 4175  df-id 4416  df-xp 4757  df-rel 4758  df-cnv 4759  df-co 4760  df-dm 4761  df-rn 4762  df-res 4763  df-ima 4764  df-iota 5314  df-fun 5356  df-fn 5357  df-f 5358  df-f1 5359  df-fo 5360  df-f1o 5361  df-fv 5362  df-riota 6005  df-ov 6055  df-oprab 6056  df-mpo 6057  df-tpos 6478  df-pnf 8315  df-mnf 8316  df-ltxr 8318  df-inn 9243  df-2 9301  df-3 9302  df-ndx 13236  df-slot 13237  df-base 13239  df-sets 13240  df-plusg 13324  df-mulr 13325  df-0g 13492  df-mgm 13590  df-sgrp 13636  df-mnd 13651  df-grp 13737  df-minusg 13738  df-cmn 14024  df-abl 14025  df-mgp 14086  df-ur 14125  df-srg 14129  df-ring 14163  df-oppr 14233  df-dvdsr 14255  df-unit 14256  df-nzr 14347  df-lring 14358

This theorem is referenced by:  opprdrng  14480