Theorem subrguss 14249

Description: A unit of a subring is a unit of the parent ring. (Contributed by Mario Carneiro, 4-Dec-2014.)

Hypotheses

Ref	Expression
subrguss.1	|- S = ( R ↾s A )
subrguss.2	|- U = (Unit ` R )
subrguss.3	|- V = (Unit ` S )

Assertion

Ref	Expression
subrguss	|- ( A e. (SubRing ` R ) -> V C_ U )

Proof of Theorem subrguss

Dummy variable x is distinct from all other variables.

Step	Hyp	Ref	Expression
1		subrguss.3	. . . . . . . . 9 |- V = (Unit ` S )
2	1	a1i 9	. . . . . . . 8 |- ( A e. (SubRing ` R ) -> V = (Unit ` S ) )
3		eqidd 2232	. . . . . . . 8 |- ( A e. (SubRing ` R ) -> ( 1r ` S ) = ( 1r ` S ) )
4		eqidd 2232	. . . . . . . 8 |- ( A e. (SubRing ` R ) -> ( ||r ` S ) = ( ||r ` S ) )
5		eqidd 2232	. . . . . . . 8 |- ( A e. (SubRing ` R ) -> (oppr ` S ) = (oppr ` S ) )
6		eqidd 2232	. . . . . . . 8 |- ( A e. (SubRing ` R ) -> ( ||r ` (oppr ` S ) ) = ( ||r ` (oppr ` S ) ) )
7		subrguss.1	. . . . . . . . . 10 |- S = ( R ↾s A )
8	7	subrgring 14237	. . . . . . . . 9 |- ( A e. (SubRing ` R ) -> S e. Ring )
9		ringsrg 14059	. . . . . . . . 9 |- ( S e. Ring -> S e. SRing )
10	8, 9	syl 14	. . . . . . . 8 |- ( A e. (SubRing ` R ) -> S e. SRing )
11	2, 3, 4, 5, 6, 10	isunitd 14119	. . . . . . 7 |- ( A e. (SubRing ` R ) -> ( x e. V <-> ( x ( ||r ` S ) ( 1r ` S ) /\ x ( ||r ` (oppr ` S ) ) ( 1r ` S ) ) ) )
12	11	simprbda 383	. . . . . 6 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> x ( ||r ` S ) ( 1r ` S ) )
13		eqid 2231	. . . . . . . 8 |- ( 1r ` R ) = ( 1r ` R )
14	7, 13	subrg1 14244	. . . . . . 7 |- ( A e. (SubRing ` R ) -> ( 1r ` R ) = ( 1r ` S ) )
15	14	adantr 276	. . . . . 6 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> ( 1r ` R ) = ( 1r ` S ) )
16	12, 15	breqtrrd 4116	. . . . 5 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> x ( ||r ` S ) ( 1r ` R ) )
17		eqid 2231	. . . . . . . 8 |- ( ||r ` R ) = ( ||r ` R )
18		eqid 2231	. . . . . . . 8 |- ( ||r ` S ) = ( ||r ` S )
19	7, 17, 18	subrgdvds 14248	. . . . . . 7 |- ( A e. (SubRing ` R ) -> ( ||r ` S ) C_ ( ||r ` R ) )
20	19	adantr 276	. . . . . 6 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> ( ||r ` S ) C_ ( ||r ` R ) )
21	20	ssbrd 4131	. . . . 5 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> ( x ( ||r ` S ) ( 1r ` R ) -> x ( ||r ` R ) ( 1r ` R ) ) )
22	16, 21	mpd 13	. . . 4 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> x ( ||r ` R ) ( 1r ` R ) )
23		subrgrcl 14239	. . . . . . . 8 |- ( A e. (SubRing ` R ) -> R e. Ring )
24	23	adantr 276	. . . . . . 7 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> R e. Ring )
25		eqid 2231	. . . . . . . 8 |- (oppr ` R ) = (oppr ` R )
26		eqid 2231	. . . . . . . 8 |- ( Base ` R ) = ( Base ` R )
27	25, 26	opprbasg 14087	. . . . . . 7 |- ( R e. Ring -> ( Base ` R ) = ( Base ` (oppr ` R ) ) )
28	24, 27	syl 14	. . . . . 6 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> ( Base ` R ) = ( Base ` (oppr ` R ) ) )
29		eqidd 2232	. . . . . 6 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> ( ||r ` (oppr ` R ) ) = ( ||r ` (oppr ` R ) ) )
30	25	opprring 14091	. . . . . . 7 |- ( R e. Ring -> (oppr ` R ) e. Ring )
31		ringsrg 14059	. . . . . . 7 |- ( (oppr ` R ) e. Ring -> (oppr ` R ) e. SRing )
32	24, 30, 31	3syl 17	. . . . . 6 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> (oppr ` R ) e. SRing )
33		eqidd 2232	. . . . . 6 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> ( .r ` (oppr ` R ) ) = ( .r ` (oppr ` R ) ) )
34	7	subrgbas 14243	. . . . . . . . 9 |- ( A e. (SubRing ` R ) -> A = ( Base ` S ) )
35	34	adantr 276	. . . . . . . 8 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> A = ( Base ` S ) )
36	26	subrgss 14235	. . . . . . . . 9 |- ( A e. (SubRing ` R ) -> A C_ ( Base ` R ) )
37	36	adantr 276	. . . . . . . 8 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> A C_ ( Base ` R ) )
38	35, 37	eqsstrrd 3264	. . . . . . 7 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> ( Base ` S ) C_ ( Base ` R ) )
39		eqidd 2232	. . . . . . . 8 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> ( Base ` S ) = ( Base ` S ) )
40	1	a1i 9	. . . . . . . 8 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> V = (Unit ` S ) )
41	10	adantr 276	. . . . . . . 8 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> S e. SRing )
42		simpr 110	. . . . . . . 8 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> x e. V )
43	39, 40, 41, 42	unitcld 14121	. . . . . . 7 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> x e. ( Base ` S ) )
44	38, 43	sseldd 3228	. . . . . 6 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> x e. ( Base ` R ) )
45		eqid 2231	. . . . . . . . 9 |- ( invr ` S ) = ( invr ` S )
46		eqid 2231	. . . . . . . . 9 |- ( Base ` S ) = ( Base ` S )
47	1, 45, 46	ringinvcl 14138	. . . . . . . 8 |- ( ( S e. Ring /\ x e. V ) -> ( ( invr ` S ) ` x ) e. ( Base ` S ) )
48	8, 47	sylan 283	. . . . . . 7 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> ( ( invr ` S ) ` x ) e. ( Base ` S ) )
49	38, 48	sseldd 3228	. . . . . 6 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> ( ( invr ` S ) ` x ) e. ( Base ` R ) )
50	28, 29, 32, 33, 44, 49	dvdsrmuld 14109	. . . . 5 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> x ( ||r ` (oppr ` R ) ) ( ( ( invr ` S ) ` x ) ( .r ` (oppr ` R ) ) x ) )
51	1, 45	unitinvcl 14136	. . . . . . . 8 |- ( ( S e. Ring /\ x e. V ) -> ( ( invr ` S ) ` x ) e. V )
52	8, 51	sylan 283	. . . . . . 7 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> ( ( invr ` S ) ` x ) e. V )
53		eqid 2231	. . . . . . . 8 |- ( .r ` R ) = ( .r ` R )
54		eqid 2231	. . . . . . . 8 |- ( .r ` (oppr ` R ) ) = ( .r ` (oppr ` R ) )
55	26, 53, 25, 54	opprmulg 14083	. . . . . . 7 |- ( ( R e. Ring /\ ( ( invr ` S ) ` x ) e. V /\ x e. V ) -> ( ( ( invr ` S ) ` x ) ( .r ` (oppr ` R ) ) x ) = ( x ( .r ` R ) ( ( invr ` S ) ` x ) ) )
56	24, 52, 42, 55	syl3anc 1273	. . . . . 6 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> ( ( ( invr ` S ) ` x ) ( .r ` (oppr ` R ) ) x ) = ( x ( .r ` R ) ( ( invr ` S ) ` x ) ) )
57		eqid 2231	. . . . . . . . 9 |- ( .r ` S ) = ( .r ` S )
58		eqid 2231	. . . . . . . . 9 |- ( 1r ` S ) = ( 1r ` S )
59	1, 45, 57, 58	unitrinv 14140	. . . . . . . 8 |- ( ( S e. Ring /\ x e. V ) -> ( x ( .r ` S ) ( ( invr ` S ) ` x ) ) = ( 1r ` S ) )
60	8, 59	sylan 283	. . . . . . 7 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> ( x ( .r ` S ) ( ( invr ` S ) ` x ) ) = ( 1r ` S ) )
61	7, 53	ressmulrg 13227	. . . . . . . . . 10 |- ( ( A e. (SubRing ` R ) /\ R e. Ring ) -> ( .r ` R ) = ( .r ` S ) )
62	23, 61	mpdan 421	. . . . . . . . 9 |- ( A e. (SubRing ` R ) -> ( .r ` R ) = ( .r ` S ) )
63	62	adantr 276	. . . . . . . 8 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> ( .r ` R ) = ( .r ` S ) )
64	63	oveqd 6034	. . . . . . 7 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> ( x ( .r ` R ) ( ( invr ` S ) ` x ) ) = ( x ( .r ` S ) ( ( invr ` S ) ` x ) ) )
65	60, 64, 15	3eqtr4d 2274	. . . . . 6 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> ( x ( .r ` R ) ( ( invr ` S ) ` x ) ) = ( 1r ` R ) )
66	56, 65	eqtrd 2264	. . . . 5 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> ( ( ( invr ` S ) ` x ) ( .r ` (oppr ` R ) ) x ) = ( 1r ` R ) )
67	50, 66	breqtrd 4114	. . . 4 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> x ( ||r ` (oppr ` R ) ) ( 1r ` R ) )
68		subrguss.2	. . . . . . 7 |- U = (Unit ` R )
69	68	a1i 9	. . . . . 6 |- ( A e. (SubRing ` R ) -> U = (Unit ` R ) )
70		eqidd 2232	. . . . . 6 |- ( A e. (SubRing ` R ) -> ( 1r ` R ) = ( 1r ` R ) )
71		eqidd 2232	. . . . . 6 |- ( A e. (SubRing ` R ) -> ( ||r ` R ) = ( ||r ` R ) )
72		eqidd 2232	. . . . . 6 |- ( A e. (SubRing ` R ) -> (oppr ` R ) = (oppr ` R ) )
73		eqidd 2232	. . . . . 6 |- ( A e. (SubRing ` R ) -> ( ||r ` (oppr ` R ) ) = ( ||r ` (oppr ` R ) ) )
74		ringsrg 14059	. . . . . . 7 |- ( R e. Ring -> R e. SRing )
75	23, 74	syl 14	. . . . . 6 |- ( A e. (SubRing ` R ) -> R e. SRing )
76	69, 70, 71, 72, 73, 75	isunitd 14119	. . . . 5 |- ( A e. (SubRing ` R ) -> ( x e. U <-> ( x ( ||r ` R ) ( 1r ` R ) /\ x ( ||r ` (oppr ` R ) ) ( 1r ` R ) ) ) )
77	76	adantr 276	. . . 4 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> ( x e. U <-> ( x ( ||r ` R ) ( 1r ` R ) /\ x ( ||r ` (oppr ` R ) ) ( 1r ` R ) ) ) )
78	22, 67, 77	mpbir2and 952	. . 3 |- ( ( A e. (SubRing ` R ) /\ x e. V ) -> x e. U )
79	78	ex 115	. 2 |- ( A e. (SubRing ` R ) -> ( x e. V -> x e. U ) )
80	79	ssrdv 3233	1 |- ( A e. (SubRing ` R ) -> V C_ U )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   = wceq 1397   e. wcel 2202   C_ wss 3200   class class class wbr 4088   ` cfv 5326  (class class class)co 6017   Basecbs 13081   ↾_s cress 13082   .rcmulr 13160   1rcur 13971  SRingcsrg 13975   Ringcrg 14008  opp_rcoppr 14079   ||_rcdsr 14098  Unitcui 14099   invrcinvr 14133  SubRingcsubrg 14230

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-coll 4204  ax-sep 4207  ax-nul 4215  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-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-iun 3972  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-f 5330  df-f1 5331  df-fo 5332  df-f1o 5333  df-fv 5334  df-riota 5970  df-ov 6020  df-oprab 6021  df-mpo 6022  df-tpos 6410  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-0g 13340  df-mgm 13438  df-sgrp 13484  df-mnd 13499  df-grp 13585  df-minusg 13586  df-subg 13756  df-cmn 13872  df-abl 13873  df-mgp 13933  df-ur 13972  df-srg 13976  df-ring 14010  df-oppr 14080  df-dvdsr 14101  df-unit 14102  df-invr 14134  df-subrg 14232

This theorem is referenced by:  subrginv  14250  subrgdv  14251  subrgunit  14252  subrgugrp  14253