Theorem ringidss 13661

Description: A subset of the multiplicative group has the multiplicative identity as its identity if the identity is in the subset. (Contributed by Mario Carneiro, 27-Dec-2014.) (Revised by Mario Carneiro, 30-Apr-2015.)

Hypotheses

Ref	Expression
ringidss.g	⊢ 𝑀 = ((mulGrp‘𝑅) ↾s 𝐴)
ringidss.b	⊢ 𝐵 = (Base‘𝑅)
ringidss.u	⊢ 1 = (1r‘𝑅)

Assertion

Ref	Expression
ringidss	⊢ ((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) → 1 = (0g‘𝑀))

Proof of Theorem ringidss

Dummy variable 𝑦 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		eqid 2196	. 2 ⊢ (Base‘𝑀) = (Base‘𝑀)
2		eqid 2196	. 2 ⊢ (0g‘𝑀) = (0g‘𝑀)
3		eqid 2196	. 2 ⊢ (+g‘𝑀) = (+g‘𝑀)
4		simp3 1001	. . 3 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) → 1 ∈ 𝐴)
5		ringidss.g	. . . . 5 ⊢ 𝑀 = ((mulGrp‘𝑅) ↾s 𝐴)
6	5	a1i 9	. . . 4 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) → 𝑀 = ((mulGrp‘𝑅) ↾s 𝐴))
7		eqid 2196	. . . . . 6 ⊢ (mulGrp‘𝑅) = (mulGrp‘𝑅)
8		ringidss.b	. . . . . 6 ⊢ 𝐵 = (Base‘𝑅)
9	7, 8	mgpbasg 13558	. . . . 5 ⊢ (𝑅 ∈ Ring → 𝐵 = (Base‘(mulGrp‘𝑅)))
10	9	3ad2ant1 1020	. . . 4 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) → 𝐵 = (Base‘(mulGrp‘𝑅)))
11	7	mgpex 13557	. . . . 5 ⊢ (𝑅 ∈ Ring → (mulGrp‘𝑅) ∈ V)
12	11	3ad2ant1 1020	. . . 4 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) → (mulGrp‘𝑅) ∈ V)
13		simp2 1000	. . . 4 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) → 𝐴 ⊆ 𝐵)
14	6, 10, 12, 13	ressbas2d 12771	. . 3 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) → 𝐴 = (Base‘𝑀))
15	4, 14	eleqtrd 2275	. 2 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) → 1 ∈ (Base‘𝑀))
16	14, 13	eqsstrrd 3221	. . . 4 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) → (Base‘𝑀) ⊆ 𝐵)
17	16	sselda 3184	. . 3 ⊢ (((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) ∧ 𝑦 ∈ (Base‘𝑀)) → 𝑦 ∈ 𝐵)
18		eqid 2196	. . . . . . . . 9 ⊢ (.r‘𝑅) = (.r‘𝑅)
19	7, 18	mgpplusgg 13556	. . . . . . . 8 ⊢ (𝑅 ∈ Ring → (.r‘𝑅) = (+g‘(mulGrp‘𝑅)))
20	19	3ad2ant1 1020	. . . . . . 7 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) → (.r‘𝑅) = (+g‘(mulGrp‘𝑅)))
21		basfn 12761	. . . . . . . . . 10 ⊢ Base Fn V
22		simp1 999	. . . . . . . . . . 11 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) → 𝑅 ∈ Ring)
23	22	elexd 2776	. . . . . . . . . 10 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) → 𝑅 ∈ V)
24		funfvex 5578	. . . . . . . . . . 11 ⊢ ((Fun Base ∧ 𝑅 ∈ dom Base) → (Base‘𝑅) ∈ V)
25	24	funfni 5361	. . . . . . . . . 10 ⊢ ((Base Fn V ∧ 𝑅 ∈ V) → (Base‘𝑅) ∈ V)
26	21, 23, 25	sylancr 414	. . . . . . . . 9 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) → (Base‘𝑅) ∈ V)
27	8, 26	eqeltrid 2283	. . . . . . . 8 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) → 𝐵 ∈ V)
28	27, 13	ssexd 4174	. . . . . . 7 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) → 𝐴 ∈ V)
29	6, 20, 28, 12	ressplusgd 12831	. . . . . 6 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) → (.r‘𝑅) = (+g‘𝑀))
30	29	adantr 276	. . . . 5 ⊢ (((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) ∧ 𝑦 ∈ 𝐵) → (.r‘𝑅) = (+g‘𝑀))
31	30	oveqd 5942	. . . 4 ⊢ (((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) ∧ 𝑦 ∈ 𝐵) → ( 1 (.r‘𝑅)𝑦) = ( 1 (+g‘𝑀)𝑦))
32		ringidss.u	. . . . . 6 ⊢ 1 = (1r‘𝑅)
33	8, 18, 32	ringlidm 13655	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ 𝑦 ∈ 𝐵) → ( 1 (.r‘𝑅)𝑦) = 𝑦)
34	33	3ad2antl1 1161	. . . 4 ⊢ (((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) ∧ 𝑦 ∈ 𝐵) → ( 1 (.r‘𝑅)𝑦) = 𝑦)
35	31, 34	eqtr3d 2231	. . 3 ⊢ (((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) ∧ 𝑦 ∈ 𝐵) → ( 1 (+g‘𝑀)𝑦) = 𝑦)
36	17, 35	syldan 282	. 2 ⊢ (((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) ∧ 𝑦 ∈ (Base‘𝑀)) → ( 1 (+g‘𝑀)𝑦) = 𝑦)
37	30	oveqd 5942	. . . 4 ⊢ (((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) ∧ 𝑦 ∈ 𝐵) → (𝑦(.r‘𝑅) 1 ) = (𝑦(+g‘𝑀) 1 ))
38	8, 18, 32	ringridm 13656	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ 𝑦 ∈ 𝐵) → (𝑦(.r‘𝑅) 1 ) = 𝑦)
39	38	3ad2antl1 1161	. . . 4 ⊢ (((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) ∧ 𝑦 ∈ 𝐵) → (𝑦(.r‘𝑅) 1 ) = 𝑦)
40	37, 39	eqtr3d 2231	. . 3 ⊢ (((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) ∧ 𝑦 ∈ 𝐵) → (𝑦(+g‘𝑀) 1 ) = 𝑦)
41	17, 40	syldan 282	. 2 ⊢ (((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) ∧ 𝑦 ∈ (Base‘𝑀)) → (𝑦(+g‘𝑀) 1 ) = 𝑦)
42	1, 2, 3, 15, 36, 41	ismgmid2 13082	1 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) → 1 = (0g‘𝑀))

Syntax hints:   → wi 4   ∧ wa 104   ∧ w3a 980   = wceq 1364   ∈ wcel 2167  Vcvv 2763   ⊆ wss 3157   Fn wfn 5254  ‘cfv 5259  (class class class)co 5925  Basecbs 12703   ↾_s cress 12704  +_gcplusg 12780  ._rcmulr 12781  0_gc0g 12958  mulGrpcmgp 13552  1_rcur 13591  Ringcrg 13628

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 615  ax-in2 616  ax-io 710  ax-5 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-bndl 1523  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-13 2169  ax-14 2170  ax-ext 2178  ax-sep 4152  ax-pow 4208  ax-pr 4243  ax-un 4469  ax-setind 4574  ax-cnex 7987  ax-resscn 7988  ax-1cn 7989  ax-1re 7990  ax-icn 7991  ax-addcl 7992  ax-addrcl 7993  ax-mulcl 7994  ax-addcom 7996  ax-addass 7998  ax-i2m1 8001  ax-0lt1 8002  ax-0id 8004  ax-rnegex 8005  ax-pre-ltirr 8008  ax-pre-ltadd 8012

This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1367  df-fal 1370  df-nf 1475  df-sb 1777  df-eu 2048  df-mo 2049  df-clab 2183  df-cleq 2189  df-clel 2192  df-nfc 2328  df-ne 2368  df-nel 2463  df-ral 2480  df-rex 2481  df-reu 2482  df-rmo 2483  df-rab 2484  df-v 2765  df-sbc 2990  df-csb 3085  df-dif 3159  df-un 3161  df-in 3163  df-ss 3170  df-nul 3452  df-pw 3608  df-sn 3629  df-pr 3630  df-op 3632  df-uni 3841  df-int 3876  df-br 4035  df-opab 4096  df-mpt 4097  df-id 4329  df-xp 4670  df-rel 4671  df-cnv 4672  df-co 4673  df-dm 4674  df-rn 4675  df-res 4676  df-ima 4677  df-iota 5220  df-fun 5261  df-fn 5262  df-fv 5267  df-riota 5880  df-ov 5928  df-oprab 5929  df-mpo 5930  df-pnf 8080  df-mnf 8081  df-ltxr 8083  df-inn 9008  df-2 9066  df-3 9067  df-ndx 12706  df-slot 12707  df-base 12709  df-sets 12710  df-iress 12711  df-plusg 12793  df-mulr 12794  df-0g 12960  df-mgm 13058  df-sgrp 13104  df-mnd 13119  df-mgp 13553  df-ur 13592  df-ring 13630

This theorem is referenced by:  unitgrpid  13750