Theorem ringidss 14336

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 2238	. 2 ⊢ (Base‘𝑀) = (Base‘𝑀)
2		eqid 2238	. 2 ⊢ (0g‘𝑀) = (0g‘𝑀)
3		eqid 2238	. 2 ⊢ (+g‘𝑀) = (+g‘𝑀)
4		simp3 1030	. . 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 2238	. . . . . 6 ⊢ (mulGrp‘𝑅) = (mulGrp‘𝑅)
8		ringidss.b	. . . . . 6 ⊢ 𝐵 = (Base‘𝑅)
9	7, 8	mgpbasg 14226	. . . . 5 ⊢ (𝑅 ∈ Ring → 𝐵 = (Base‘(mulGrp‘𝑅)))
10	9	3ad2ant1 1049	. . . 4 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) → 𝐵 = (Base‘(mulGrp‘𝑅)))
11	7	mgpex 14225	. . . . 5 ⊢ (𝑅 ∈ Ring → (mulGrp‘𝑅) ∈ V)
12	11	3ad2ant1 1049	. . . 4 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) → (mulGrp‘𝑅) ∈ V)
13		simp2 1029	. . . 4 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) → 𝐴 ⊆ 𝐵)
14	6, 10, 12, 13	ressbas2d 13424	. . 3 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) → 𝐴 = (Base‘𝑀))
15	4, 14	eleqtrd 2317	. 2 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) → 1 ∈ (Base‘𝑀))
16	14, 13	eqsstrrd 3285	. . . 4 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) → (Base‘𝑀) ⊆ 𝐵)
17	16	sselda 3248	. . 3 ⊢ (((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) ∧ 𝑦 ∈ (Base‘𝑀)) → 𝑦 ∈ 𝐵)
18		eqid 2238	. . . . . . . . 9 ⊢ (.r‘𝑅) = (.r‘𝑅)
19	7, 18	mgpplusgg 14223	. . . . . . . 8 ⊢ (𝑅 ∈ Ring → (.r‘𝑅) = (+g‘(mulGrp‘𝑅)))
20	19	3ad2ant1 1049	. . . . . . 7 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) → (.r‘𝑅) = (+g‘(mulGrp‘𝑅)))
21		basfn 13413	. . . . . . . . . 10 ⊢ Base Fn V
22		simp1 1028	. . . . . . . . . . 11 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) → 𝑅 ∈ Ring)
23	22	elexd 2835	. . . . . . . . . 10 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) → 𝑅 ∈ V)
24		funfvex 5712	. . . . . . . . . . 11 ⊢ ((Fun Base ∧ 𝑅 ∈ dom Base) → (Base‘𝑅) ∈ V)
25	24	funfni 5483	. . . . . . . . . 10 ⊢ ((Base Fn V ∧ 𝑅 ∈ V) → (Base‘𝑅) ∈ V)
26	21, 23, 25	sylancr 418	. . . . . . . . 9 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) → (Base‘𝑅) ∈ V)
27	8, 26	eqeltrid 2325	. . . . . . . 8 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) → 𝐵 ∈ V)
28	27, 13	ssexd 4273	. . . . . . 7 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) → 𝐴 ∈ V)
29	6, 20, 28, 12	ressplusgd 13485	. . . . . 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 6102	. . . 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 14330	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ 𝑦 ∈ 𝐵) → ( 1 (.r‘𝑅)𝑦) = 𝑦)
34	33	3ad2antl1 1190	. . . 4 ⊢ (((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) ∧ 𝑦 ∈ 𝐵) → ( 1 (.r‘𝑅)𝑦) = 𝑦)
35	31, 34	eqtr3d 2273	. . 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 6102	. . . 4 ⊢ (((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) ∧ 𝑦 ∈ 𝐵) → (𝑦(.r‘𝑅) 1 ) = (𝑦(+g‘𝑀) 1 ))
38	8, 18, 32	ringridm 14331	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ 𝑦 ∈ 𝐵) → (𝑦(.r‘𝑅) 1 ) = 𝑦)
39	38	3ad2antl1 1190	. . . 4 ⊢ (((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) ∧ 𝑦 ∈ 𝐵) → (𝑦(.r‘𝑅) 1 ) = 𝑦)
40	37, 39	eqtr3d 2273	. . 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 13702	1 ⊢ ((𝑅 ∈ Ring ∧ 𝐴 ⊆ 𝐵 ∧ 1 ∈ 𝐴) → 1 = (0g‘𝑀))

This proof depends on syntax axioms:   → wi 4   ∧ wa 104   ∧ w3a 1009   = wceq 1402   ∈ wcel 2209  Vcvv 2821   ⊆ wss 3220   Fn wfn 5372  ‘cfv 5377  (class class class)co 6085  Basecbs 13354   ↾_s cress 13355  +_gcplusg 13433  ._rcmulr 13434  0_gc0g 13612  mulGrpcmgp 14219  1_rcur 14264  Ringcrg 14302

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4249  ax-pow 4311  ax-pr 4346  ax-un 4578  ax-setind 4684  ax-cnex 8270  ax-resscn 8271  ax-1cn 8272  ax-1re 8273  ax-icn 8274  ax-addcl 8275  ax-addrcl 8276  ax-mulcl 8277  ax-addcom 8279  ax-addass 8281  ax-i2m1 8284  ax-0lt1 8285  ax-0id 8287  ax-rnegex 8288  ax-pre-ltirr 8291  ax-pre-ltadd 8295

This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-nel 2516  df-ral 2533  df-rex 2534  df-reu 2535  df-rmo 2536  df-rab 2537  df-v 2823  df-sbc 3052  df-csb 3148  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-nul 3521  df-pw 3690  df-sn 3715  df-pr 3716  df-op 3718  df-uni 3936  df-int 3971  df-br 4131  df-opab 4193  df-mpt 4194  df-id 4438  df-xp 4780  df-rel 4781  df-cnv 4782  df-co 4783  df-dm 4784  df-rn 4785  df-res 4786  df-ima 4787  df-iota 5337  df-fun 5379  df-fn 5380  df-fv 5385  df-riota 6038  df-ov 6088  df-oprab 6089  df-mpo 6090  df-pnf 8362  df-mnf 8363  df-ltxr 8365  df-inn 9306  df-2 9364  df-3 9365  df-ndx 13357  df-slot 13358  df-base 13360  df-sets 13361  df-iress 13362  df-plusg 13446  df-mulr 13447  df-0g 13614  df-mgm 13678  df-sgrp 13719  df-mnd 13732  df-mgp 14220  df-ur 14265  df-ring 14304

This theorem is used by:  unitgrpid  14427