Theorem issubrng2 14223

Description: Characterize the subrings of a ring by closure properties. (Contributed by AV, 15-Feb-2025.)

Hypotheses

Ref	Expression
issubrng2.b	|- B = ( Base ` R )
issubrng2.t	|- .x. = ( .r ` R )

Assertion

Ref	Expression
issubrng2	|- ( R e. Rng -> ( A e. (SubRng ` R ) <-> ( A e. (SubGrp ` R ) /\ A. x e. A A. y e. A ( x .x. y ) e. A ) ) )

Distinct variable groups:   x, y, A   x, R, y   x, .x. , y

Allowed substitution hints:   B( x, y)

Proof of Theorem issubrng2

Dummy variables v u w are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		subrngsubg 14217	. . 3 |- ( A e. (SubRng ` R ) -> A e. (SubGrp ` R ) )
2		issubrng2.t	. . . . . 6 |- .x. = ( .r ` R )
3	2	subrngmcl 14222	. . . . 5 |- ( ( A e. (SubRng ` R ) /\ x e. A /\ y e. A ) -> ( x .x. y ) e. A )
4	3	3expb 1230	. . . 4 |- ( ( A e. (SubRng ` R ) /\ ( x e. A /\ y e. A ) ) -> ( x .x. y ) e. A )
5	4	ralrimivva 2614	. . 3 |- ( A e. (SubRng ` R ) -> A. x e. A A. y e. A ( x .x. y ) e. A )
6	1, 5	jca 306	. 2 |- ( A e. (SubRng ` R ) -> ( A e. (SubGrp ` R ) /\ A. x e. A A. y e. A ( x .x. y ) e. A ) )
7		simpl 109	. . . 4 |- ( ( R e. Rng /\ ( A e. (SubGrp ` R ) /\ A. x e. A A. y e. A ( x .x. y ) e. A ) ) -> R e. Rng )
8		simprl 531	. . . . . 6 |- ( ( R e. Rng /\ ( A e. (SubGrp ` R ) /\ A. x e. A A. y e. A ( x .x. y ) e. A ) ) -> A e. (SubGrp ` R ) )
9		eqid 2231	. . . . . . 7 |- ( R ↾s A ) = ( R ↾s A )
10	9	subgbas 13764	. . . . . 6 |- ( A e. (SubGrp ` R ) -> A = ( Base ` ( R ↾s A ) ) )
11	8, 10	syl 14	. . . . 5 |- ( ( R e. Rng /\ ( A e. (SubGrp ` R ) /\ A. x e. A A. y e. A ( x .x. y ) e. A ) ) -> A = ( Base ` ( R ↾s A ) ) )
12		eqidd 2232	. . . . . . 7 |- ( A e. (SubGrp ` R ) -> ( R ↾s A ) = ( R ↾s A ) )
13		eqidd 2232	. . . . . . 7 |- ( A e. (SubGrp ` R ) -> ( +g ` R ) = ( +g ` R ) )
14		id 19	. . . . . . 7 |- ( A e. (SubGrp ` R ) -> A e. (SubGrp ` R ) )
15		subgrcl 13765	. . . . . . 7 |- ( A e. (SubGrp ` R ) -> R e. Grp )
16	12, 13, 14, 15	ressplusgd 13211	. . . . . 6 |- ( A e. (SubGrp ` R ) -> ( +g ` R ) = ( +g ` ( R ↾s A ) ) )
17	8, 16	syl 14	. . . . 5 |- ( ( R e. Rng /\ ( A e. (SubGrp ` R ) /\ A. x e. A A. y e. A ( x .x. y ) e. A ) ) -> ( +g ` R ) = ( +g ` ( R ↾s A ) ) )
18	9, 2	ressmulrg 13227	. . . . . 6 |- ( ( A e. (SubGrp ` R ) /\ R e. Grp ) -> .x. = ( .r ` ( R ↾s A ) ) )
19	8, 15, 18	syl2anc2 412	. . . . 5 |- ( ( R e. Rng /\ ( A e. (SubGrp ` R ) /\ A. x e. A A. y e. A ( x .x. y ) e. A ) ) -> .x. = ( .r ` ( R ↾s A ) ) )
20		rngabl 13947	. . . . . 6 |- ( R e. Rng -> R e. Abel )
21	9	subgabl 13918	. . . . . 6 |- ( ( R e. Abel /\ A e. (SubGrp ` R ) ) -> ( R ↾s A ) e. Abel )
22	20, 8, 21	syl2an2r 599	. . . . 5 |- ( ( R e. Rng /\ ( A e. (SubGrp ` R ) /\ A. x e. A A. y e. A ( x .x. y ) e. A ) ) -> ( R ↾s A ) e. Abel )
23		simprr 533	. . . . . . 7 |- ( ( R e. Rng /\ ( A e. (SubGrp ` R ) /\ A. x e. A A. y e. A ( x .x. y ) e. A ) ) -> A. x e. A A. y e. A ( x .x. y ) e. A )
24		oveq1 6024	. . . . . . . . 9 |- ( x = u -> ( x .x. y ) = ( u .x. y ) )
25	24	eleq1d 2300	. . . . . . . 8 |- ( x = u -> ( ( x .x. y ) e. A <-> ( u .x. y ) e. A ) )
26		oveq2 6025	. . . . . . . . 9 |- ( y = v -> ( u .x. y ) = ( u .x. v ) )
27	26	eleq1d 2300	. . . . . . . 8 |- ( y = v -> ( ( u .x. y ) e. A <-> ( u .x. v ) e. A ) )
28	25, 27	rspc2v 2923	. . . . . . 7 |- ( ( u e. A /\ v e. A ) -> ( A. x e. A A. y e. A ( x .x. y ) e. A -> ( u .x. v ) e. A ) )
29	23, 28	syl5com 29	. . . . . 6 |- ( ( R e. Rng /\ ( A e. (SubGrp ` R ) /\ A. x e. A A. y e. A ( x .x. y ) e. A ) ) -> ( ( u e. A /\ v e. A ) -> ( u .x. v ) e. A ) )
30	29	3impib 1227	. . . . 5 |- ( ( ( R e. Rng /\ ( A e. (SubGrp ` R ) /\ A. x e. A A. y e. A ( x .x. y ) e. A ) ) /\ u e. A /\ v e. A ) -> ( u .x. v ) e. A )
31		issubrng2.b	. . . . . . . . . . 11 |- B = ( Base ` R )
32	31	subgss 13760	. . . . . . . . . 10 |- ( A e. (SubGrp ` R ) -> A C_ B )
33	8, 32	syl 14	. . . . . . . . 9 |- ( ( R e. Rng /\ ( A e. (SubGrp ` R ) /\ A. x e. A A. y e. A ( x .x. y ) e. A ) ) -> A C_ B )
34	33	sseld 3226	. . . . . . . 8 |- ( ( R e. Rng /\ ( A e. (SubGrp ` R ) /\ A. x e. A A. y e. A ( x .x. y ) e. A ) ) -> ( u e. A -> u e. B ) )
35	33	sseld 3226	. . . . . . . 8 |- ( ( R e. Rng /\ ( A e. (SubGrp ` R ) /\ A. x e. A A. y e. A ( x .x. y ) e. A ) ) -> ( v e. A -> v e. B ) )
36	33	sseld 3226	. . . . . . . 8 |- ( ( R e. Rng /\ ( A e. (SubGrp ` R ) /\ A. x e. A A. y e. A ( x .x. y ) e. A ) ) -> ( w e. A -> w e. B ) )
37	34, 35, 36	3anim123d 1355	. . . . . . 7 |- ( ( R e. Rng /\ ( A e. (SubGrp ` R ) /\ A. x e. A A. y e. A ( x .x. y ) e. A ) ) -> ( ( u e. A /\ v e. A /\ w e. A ) -> ( u e. B /\ v e. B /\ w e. B ) ) )
38	37	imp 124	. . . . . 6 |- ( ( ( R e. Rng /\ ( A e. (SubGrp ` R ) /\ A. x e. A A. y e. A ( x .x. y ) e. A ) ) /\ ( u e. A /\ v e. A /\ w e. A ) ) -> ( u e. B /\ v e. B /\ w e. B ) )
39	31, 2	rngass 13951	. . . . . . 7 |- ( ( R e. Rng /\ ( u e. B /\ v e. B /\ w e. B ) ) -> ( ( u .x. v ) .x. w ) = ( u .x. ( v .x. w ) ) )
40	39	adantlr 477	. . . . . 6 |- ( ( ( R e. Rng /\ ( A e. (SubGrp ` R ) /\ A. x e. A A. y e. A ( x .x. y ) e. A ) ) /\ ( u e. B /\ v e. B /\ w e. B ) ) -> ( ( u .x. v ) .x. w ) = ( u .x. ( v .x. w ) ) )
41	38, 40	syldan 282	. . . . 5 |- ( ( ( R e. Rng /\ ( A e. (SubGrp ` R ) /\ A. x e. A A. y e. A ( x .x. y ) e. A ) ) /\ ( u e. A /\ v e. A /\ w e. A ) ) -> ( ( u .x. v ) .x. w ) = ( u .x. ( v .x. w ) ) )
42		eqid 2231	. . . . . . . 8 |- ( +g ` R ) = ( +g ` R )
43	31, 42, 2	rngdi 13952	. . . . . . 7 |- ( ( R e. Rng /\ ( u e. B /\ v e. B /\ w e. B ) ) -> ( u .x. ( v ( +g ` R ) w ) ) = ( ( u .x. v ) ( +g ` R ) ( u .x. w ) ) )
44	43	adantlr 477	. . . . . 6 |- ( ( ( R e. Rng /\ ( A e. (SubGrp ` R ) /\ A. x e. A A. y e. A ( x .x. y ) e. A ) ) /\ ( u e. B /\ v e. B /\ w e. B ) ) -> ( u .x. ( v ( +g ` R ) w ) ) = ( ( u .x. v ) ( +g ` R ) ( u .x. w ) ) )
45	38, 44	syldan 282	. . . . 5 |- ( ( ( R e. Rng /\ ( A e. (SubGrp ` R ) /\ A. x e. A A. y e. A ( x .x. y ) e. A ) ) /\ ( u e. A /\ v e. A /\ w e. A ) ) -> ( u .x. ( v ( +g ` R ) w ) ) = ( ( u .x. v ) ( +g ` R ) ( u .x. w ) ) )
46	31, 42, 2	rngdir 13953	. . . . . . 7 |- ( ( R e. Rng /\ ( u e. B /\ v e. B /\ w e. B ) ) -> ( ( u ( +g ` R ) v ) .x. w ) = ( ( u .x. w ) ( +g ` R ) ( v .x. w ) ) )
47	46	adantlr 477	. . . . . 6 |- ( ( ( R e. Rng /\ ( A e. (SubGrp ` R ) /\ A. x e. A A. y e. A ( x .x. y ) e. A ) ) /\ ( u e. B /\ v e. B /\ w e. B ) ) -> ( ( u ( +g ` R ) v ) .x. w ) = ( ( u .x. w ) ( +g ` R ) ( v .x. w ) ) )
48	38, 47	syldan 282	. . . . 5 |- ( ( ( R e. Rng /\ ( A e. (SubGrp ` R ) /\ A. x e. A A. y e. A ( x .x. y ) e. A ) ) /\ ( u e. A /\ v e. A /\ w e. A ) ) -> ( ( u ( +g ` R ) v ) .x. w ) = ( ( u .x. w ) ( +g ` R ) ( v .x. w ) ) )
49	11, 17, 19, 22, 30, 41, 45, 48	isrngd 13965	. . . 4 |- ( ( R e. Rng /\ ( A e. (SubGrp ` R ) /\ A. x e. A A. y e. A ( x .x. y ) e. A ) ) -> ( R ↾s A ) e. Rng )
50	31	issubrng 14212	. . . 4 |- ( A e. (SubRng ` R ) <-> ( R e. Rng /\ ( R ↾s A ) e. Rng /\ A C_ B ) )
51	7, 49, 33, 50	syl3anbrc 1207	. . 3 |- ( ( R e. Rng /\ ( A e. (SubGrp ` R ) /\ A. x e. A A. y e. A ( x .x. y ) e. A ) ) -> A e. (SubRng ` R ) )
52	51	ex 115	. 2 |- ( R e. Rng -> ( ( A e. (SubGrp ` R ) /\ A. x e. A A. y e. A ( x .x. y ) e. A ) -> A e. (SubRng ` R ) ) )
53	6, 52	impbid2 143	1 |- ( R e. Rng -> ( A e. (SubRng ` R ) <-> ( A e. (SubGrp ` R ) /\ A. x e. A A. y e. A ( x .x. y ) e. A ) ) )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   /\ w3a 1004   = wceq 1397   e. wcel 2202   A.wral 2510   C_ wss 3200   ` cfv 5326  (class class class)co 6017   Basecbs 13081   ↾_s cress 13082   +g cplusg 13159   .rcmulr 13160   Grpcgrp 13582  SubGrpcsubg 13753   Abelcabl 13871  Rngcrng 13944  SubRngcsubrng 14210

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 8122  ax-resscn 8123  ax-1cn 8124  ax-1re 8125  ax-icn 8126  ax-addcl 8127  ax-addrcl 8128  ax-mulcl 8129  ax-addcom 8131  ax-addass 8133  ax-i2m1 8136  ax-0lt1 8137  ax-0id 8139  ax-rnegex 8140  ax-pre-ltirr 8143  ax-pre-lttrn 8145  ax-pre-ltadd 8147

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-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-ima 4738  df-iota 5286  df-fun 5328  df-fn 5329  df-fv 5334  df-ov 6020  df-oprab 6021  df-mpo 6022  df-pnf 8215  df-mnf 8216  df-ltxr 8218  df-inn 9143  df-2 9201  df-3 9202  df-ndx 13084  df-slot 13085  df-base 13087  df-sets 13088  df-iress 13089  df-plusg 13172  df-mulr 13173  df-mgm 13438  df-sgrp 13484  df-grp 13585  df-subg 13756  df-cmn 13872  df-abl 13873  df-mgp 13933  df-rng 13945  df-subrng 14211

This theorem is referenced by:  opprsubrngg  14224  subrngintm  14225