Theorem elrhmunit 14162

Description: Ring homomorphisms preserve unit elements. (Contributed by Thierry Arnoux, 23-Oct-2017.)

Assertion

Ref	Expression
elrhmunit	⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (𝐹‘𝐴) ∈ (Unit‘𝑆))

Proof of Theorem elrhmunit

Step	Hyp	Ref	Expression
1		simpl 109	. . . 4 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → 𝐹 ∈ (𝑅 RingHom 𝑆))
2		eqidd 2230	. . . . 5 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (Base‘𝑅) = (Base‘𝑅))
3		eqidd 2230	. . . . 5 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (Unit‘𝑅) = (Unit‘𝑅))
4		rhmrcl1 14140	. . . . . . 7 ⊢ (𝐹 ∈ (𝑅 RingHom 𝑆) → 𝑅 ∈ Ring)
5	4	adantr 276	. . . . . 6 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → 𝑅 ∈ Ring)
6		ringsrg 14031	. . . . . 6 ⊢ (𝑅 ∈ Ring → 𝑅 ∈ SRing)
7	5, 6	syl 14	. . . . 5 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → 𝑅 ∈ SRing)
8		simpr 110	. . . . 5 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → 𝐴 ∈ (Unit‘𝑅))
9	2, 3, 7, 8	unitcld 14093	. . . 4 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → 𝐴 ∈ (Base‘𝑅))
10		eqid 2229	. . . . . 6 ⊢ (Base‘𝑅) = (Base‘𝑅)
11		eqid 2229	. . . . . 6 ⊢ (1r‘𝑅) = (1r‘𝑅)
12	10, 11	ringidcl 14004	. . . . 5 ⊢ (𝑅 ∈ Ring → (1r‘𝑅) ∈ (Base‘𝑅))
13	1, 4, 12	3syl 17	. . . 4 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (1r‘𝑅) ∈ (Base‘𝑅))
14		eqidd 2230	. . . . . . 7 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (1r‘𝑅) = (1r‘𝑅))
15		eqidd 2230	. . . . . . 7 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (∥r‘𝑅) = (∥r‘𝑅))
16		eqidd 2230	. . . . . . 7 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (oppr‘𝑅) = (oppr‘𝑅))
17		eqidd 2230	. . . . . . 7 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (∥r‘(oppr‘𝑅)) = (∥r‘(oppr‘𝑅)))
18	3, 14, 15, 16, 17, 7	isunitd 14091	. . . . . 6 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (𝐴 ∈ (Unit‘𝑅) ↔ (𝐴(∥r‘𝑅)(1r‘𝑅) ∧ 𝐴(∥r‘(oppr‘𝑅))(1r‘𝑅))))
19	8, 18	mpbid 147	. . . . 5 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (𝐴(∥r‘𝑅)(1r‘𝑅) ∧ 𝐴(∥r‘(oppr‘𝑅))(1r‘𝑅)))
20	19	simpld 112	. . . 4 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → 𝐴(∥r‘𝑅)(1r‘𝑅))
21		eqid 2229	. . . . 5 ⊢ (∥r‘𝑅) = (∥r‘𝑅)
22		eqid 2229	. . . . 5 ⊢ (∥r‘𝑆) = (∥r‘𝑆)
23	10, 21, 22	rhmdvdsr 14160	. . . 4 ⊢ (((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Base‘𝑅) ∧ (1r‘𝑅) ∈ (Base‘𝑅)) ∧ 𝐴(∥r‘𝑅)(1r‘𝑅)) → (𝐹‘𝐴)(∥r‘𝑆)(𝐹‘(1r‘𝑅)))
24	1, 9, 13, 20, 23	syl31anc 1274	. . 3 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (𝐹‘𝐴)(∥r‘𝑆)(𝐹‘(1r‘𝑅)))
25		eqid 2229	. . . . . 6 ⊢ (1r‘𝑆) = (1r‘𝑆)
26	11, 25	rhm1 14152	. . . . 5 ⊢ (𝐹 ∈ (𝑅 RingHom 𝑆) → (𝐹‘(1r‘𝑅)) = (1r‘𝑆))
27	26	breq2d 4095	. . . 4 ⊢ (𝐹 ∈ (𝑅 RingHom 𝑆) → ((𝐹‘𝐴)(∥r‘𝑆)(𝐹‘(1r‘𝑅)) ↔ (𝐹‘𝐴)(∥r‘𝑆)(1r‘𝑆)))
28	27	adantr 276	. . 3 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → ((𝐹‘𝐴)(∥r‘𝑆)(𝐹‘(1r‘𝑅)) ↔ (𝐹‘𝐴)(∥r‘𝑆)(1r‘𝑆)))
29	24, 28	mpbid 147	. 2 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (𝐹‘𝐴)(∥r‘𝑆)(1r‘𝑆))
30		rhmopp 14161	. . . . 5 ⊢ (𝐹 ∈ (𝑅 RingHom 𝑆) → 𝐹 ∈ ((oppr‘𝑅) RingHom (oppr‘𝑆)))
31	30	adantr 276	. . . 4 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → 𝐹 ∈ ((oppr‘𝑅) RingHom (oppr‘𝑆)))
32		eqid 2229	. . . . . . 7 ⊢ (oppr‘𝑅) = (oppr‘𝑅)
33	32, 10	opprbasg 14059	. . . . . 6 ⊢ (𝑅 ∈ Ring → (Base‘𝑅) = (Base‘(oppr‘𝑅)))
34	5, 33	syl 14	. . . . 5 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (Base‘𝑅) = (Base‘(oppr‘𝑅)))
35	9, 34	eleqtrd 2308	. . . 4 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → 𝐴 ∈ (Base‘(oppr‘𝑅)))
36	13, 34	eleqtrd 2308	. . . 4 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (1r‘𝑅) ∈ (Base‘(oppr‘𝑅)))
37	19	simprd 114	. . . 4 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → 𝐴(∥r‘(oppr‘𝑅))(1r‘𝑅))
38		eqid 2229	. . . . 5 ⊢ (Base‘(oppr‘𝑅)) = (Base‘(oppr‘𝑅))
39		eqid 2229	. . . . 5 ⊢ (∥r‘(oppr‘𝑅)) = (∥r‘(oppr‘𝑅))
40		eqid 2229	. . . . 5 ⊢ (∥r‘(oppr‘𝑆)) = (∥r‘(oppr‘𝑆))
41	38, 39, 40	rhmdvdsr 14160	. . . 4 ⊢ (((𝐹 ∈ ((oppr‘𝑅) RingHom (oppr‘𝑆)) ∧ 𝐴 ∈ (Base‘(oppr‘𝑅)) ∧ (1r‘𝑅) ∈ (Base‘(oppr‘𝑅))) ∧ 𝐴(∥r‘(oppr‘𝑅))(1r‘𝑅)) → (𝐹‘𝐴)(∥r‘(oppr‘𝑆))(𝐹‘(1r‘𝑅)))
42	31, 35, 36, 37, 41	syl31anc 1274	. . 3 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (𝐹‘𝐴)(∥r‘(oppr‘𝑆))(𝐹‘(1r‘𝑅)))
43	26	breq2d 4095	. . . 4 ⊢ (𝐹 ∈ (𝑅 RingHom 𝑆) → ((𝐹‘𝐴)(∥r‘(oppr‘𝑆))(𝐹‘(1r‘𝑅)) ↔ (𝐹‘𝐴)(∥r‘(oppr‘𝑆))(1r‘𝑆)))
44	43	adantr 276	. . 3 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → ((𝐹‘𝐴)(∥r‘(oppr‘𝑆))(𝐹‘(1r‘𝑅)) ↔ (𝐹‘𝐴)(∥r‘(oppr‘𝑆))(1r‘𝑆)))
45	42, 44	mpbid 147	. 2 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (𝐹‘𝐴)(∥r‘(oppr‘𝑆))(1r‘𝑆))
46		eqidd 2230	. . 3 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (Unit‘𝑆) = (Unit‘𝑆))
47		eqidd 2230	. . 3 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (1r‘𝑆) = (1r‘𝑆))
48		eqidd 2230	. . 3 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (∥r‘𝑆) = (∥r‘𝑆))
49		eqidd 2230	. . 3 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (oppr‘𝑆) = (oppr‘𝑆))
50		eqidd 2230	. . 3 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (∥r‘(oppr‘𝑆)) = (∥r‘(oppr‘𝑆)))
51		rhmrcl2 14141	. . . . 5 ⊢ (𝐹 ∈ (𝑅 RingHom 𝑆) → 𝑆 ∈ Ring)
52	51	adantr 276	. . . 4 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → 𝑆 ∈ Ring)
53		ringsrg 14031	. . . 4 ⊢ (𝑆 ∈ Ring → 𝑆 ∈ SRing)
54	52, 53	syl 14	. . 3 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → 𝑆 ∈ SRing)
55	46, 47, 48, 49, 50, 54	isunitd 14091	. 2 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → ((𝐹‘𝐴) ∈ (Unit‘𝑆) ↔ ((𝐹‘𝐴)(∥r‘𝑆)(1r‘𝑆) ∧ (𝐹‘𝐴)(∥r‘(oppr‘𝑆))(1r‘𝑆))))
56	29, 45, 55	mpbir2and 950	1 ⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (𝐹‘𝐴) ∈ (Unit‘𝑆))

Syntax hints:   → wi 4   ∧ wa 104   ↔ wb 105   = wceq 1395   ∈ wcel 2200   class class class wbr 4083  ‘cfv 5321  (class class class)co 6010  Basecbs 13053  1_rcur 13943  SRingcsrg 13947  Ringcrg 13980  opp_rcoppr 14051  ∥_rcdsr 14070  Unitcui 14071   RingHom crh 14135

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 617  ax-in2 618  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-coll 4199  ax-sep 4202  ax-nul 4210  ax-pow 4259  ax-pr 4294  ax-un 4525  ax-setind 4630  ax-cnex 8106  ax-resscn 8107  ax-1cn 8108  ax-1re 8109  ax-icn 8110  ax-addcl 8111  ax-addrcl 8112  ax-mulcl 8113  ax-addcom 8115  ax-addass 8117  ax-i2m1 8120  ax-0lt1 8121  ax-0id 8123  ax-rnegex 8124  ax-pre-ltirr 8127  ax-pre-lttrn 8129  ax-pre-ltadd 8131

This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-fal 1401  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ne 2401  df-nel 2496  df-ral 2513  df-rex 2514  df-reu 2515  df-rmo 2516  df-rab 2517  df-v 2801  df-sbc 3029  df-csb 3125  df-dif 3199  df-un 3201  df-in 3203  df-ss 3210  df-nul 3492  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3889  df-int 3924  df-iun 3967  df-br 4084  df-opab 4146  df-mpt 4147  df-id 4385  df-xp 4726  df-rel 4727  df-cnv 4728  df-co 4729  df-dm 4730  df-rn 4731  df-res 4732  df-ima 4733  df-iota 5281  df-fun 5323  df-fn 5324  df-f 5325  df-f1 5326  df-fo 5327  df-f1o 5328  df-fv 5329  df-riota 5963  df-ov 6013  df-oprab 6014  df-mpo 6015  df-1st 6295  df-2nd 6296  df-tpos 6402  df-map 6810  df-pnf 8199  df-mnf 8200  df-ltxr 8202  df-inn 9127  df-2 9185  df-3 9186  df-ndx 13056  df-slot 13057  df-base 13059  df-sets 13060  df-plusg 13144  df-mulr 13145  df-0g 13312  df-mgm 13410  df-sgrp 13456  df-mnd 13471  df-mhm 13513  df-grp 13557  df-minusg 13558  df-ghm 13799  df-cmn 13844  df-abl 13845  df-mgp 13905  df-ur 13944  df-srg 13948  df-ring 13982  df-oppr 14052  df-dvdsr 14073  df-unit 14074  df-rhm 14137

This theorem is referenced by:  rhmunitinv  14163