Theorem issubrng2 14305

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 14299	. . 3 |- ( A e. (SubRng ` R ) -> A e. (SubGrp ` R ) )
2		issubrng2.t	. . . . . 6 |- .x. = ( .r ` R )
3	2	subrngmcl 14304	. . . . 5 |- ( ( A e. (SubRng ` R ) /\ x e. A /\ y e. A ) -> ( x .x. y ) e. A )
4	3	3expb 1231	. . . 4 |- ( ( A e. (SubRng ` R ) /\ ( x e. A /\ y e. A ) ) -> ( x .x. y ) e. A )
5	4	ralrimivva 2615	. . 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 13845	. . . . . 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 13846	. . . . . . 7 |- ( A e. (SubGrp ` R ) -> R e. Grp )
16	12, 13, 14, 15	ressplusgd 13292	. . . . . 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 13308	. . . . . 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 14029	. . . . . 6 |- ( R e. Rng -> R e. Abel )
21	9	subgabl 13999	. . . . . 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 6035	. . . . . . . . 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 6036	. . . . . . . . 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 2924	. . . . . . 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 1228	. . . . 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 13841	. . . . . . . . . 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 3227	. . . . . . . 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 3227	. . . . . . . 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 3227	. . . . . . . 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 1356	. . . . . . 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 14033	. . . . . . 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 14034	. . . . . . 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 14035	. . . . . . 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 14047	. . . 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 14294	. . . 4 |- ( A e. (SubRng ` R ) <-> ( R e. Rng /\ ( R ↾s A ) e. Rng /\ A C_ B ) )
51	7, 49, 33, 50	syl3anbrc 1208	. . 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 1005   = wceq 1398   e. wcel 2202   A.wral 2511   C_ wss 3201   ` cfv 5333  (class class class)co 6028   Basecbs 13162   ↾_s cress 13163   +g cplusg 13240   .rcmulr 13241   Grpcgrp 13663  SubGrpcsubg 13834   Abelcabl 13952  Rngcrng 14026  SubRngcsubrng 14292

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 2204  ax-14 2205  ax-ext 2213  ax-sep 4212  ax-pow 4270  ax-pr 4305  ax-un 4536  ax-setind 4641  ax-cnex 8183  ax-resscn 8184  ax-1cn 8185  ax-1re 8186  ax-icn 8187  ax-addcl 8188  ax-addrcl 8189  ax-mulcl 8190  ax-addcom 8192  ax-addass 8194  ax-i2m1 8197  ax-0lt1 8198  ax-0id 8200  ax-rnegex 8201  ax-pre-ltirr 8204  ax-pre-lttrn 8206  ax-pre-ltadd 8208

This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2364  df-ne 2404  df-nel 2499  df-ral 2516  df-rex 2517  df-rab 2520  df-v 2805  df-sbc 3033  df-csb 3129  df-dif 3203  df-un 3205  df-in 3207  df-ss 3214  df-nul 3497  df-pw 3658  df-sn 3679  df-pr 3680  df-op 3682  df-uni 3899  df-int 3934  df-br 4094  df-opab 4156  df-mpt 4157  df-id 4396  df-xp 4737  df-rel 4738  df-cnv 4739  df-co 4740  df-dm 4741  df-rn 4742  df-res 4743  df-ima 4744  df-iota 5293  df-fun 5335  df-fn 5336  df-fv 5341  df-ov 6031  df-oprab 6032  df-mpo 6033  df-pnf 8275  df-mnf 8276  df-ltxr 8278  df-inn 9203  df-2 9261  df-3 9262  df-ndx 13165  df-slot 13166  df-base 13168  df-sets 13169  df-iress 13170  df-plusg 13253  df-mulr 13254  df-mgm 13519  df-sgrp 13565  df-grp 13666  df-subg 13837  df-cmn 13953  df-abl 13954  df-mgp 14015  df-rng 14027  df-subrng 14293

This theorem is referenced by:  opprsubrngg  14306  subrngintm  14307