Theorem riscer 36073

Description: Ring isomorphism is an equivalence relation. (Contributed by Jeff Madsen, 16-Jun-2011.) (Revised by Mario Carneiro, 12-Aug-2015.)

Assertion

Ref	Expression
riscer	⊢ ≃𝑟 Er dom ≃𝑟

Proof of Theorem riscer

Dummy variables 𝑓 𝑔 𝑟 𝑠 𝑡 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		df-risc 36068	. . 3 ⊢ ≃𝑟 = {⟨𝑟, 𝑠⟩ ∣ ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps) ∧ ∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠))}
2	1	relopabiv 5719	. 2 ⊢ Rel ≃𝑟
3		eqid 2738	. 2 ⊢ dom ≃𝑟 = dom ≃𝑟
4		vex 3426	. . . . . . 7 ⊢ 𝑟 ∈ V
5		vex 3426	. . . . . . 7 ⊢ 𝑠 ∈ V
6	4, 5	isrisc 36070	. . . . . 6 ⊢ (𝑟 ≃𝑟 𝑠 ↔ ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps) ∧ ∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠)))
7		rngoisocnv 36066	. . . . . . . . . 10 ⊢ ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps ∧ 𝑓 ∈ (𝑟 RngIso 𝑠)) → ◡𝑓 ∈ (𝑠 RngIso 𝑟))
8	7	3expia 1119	. . . . . . . . 9 ⊢ ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps) → (𝑓 ∈ (𝑟 RngIso 𝑠) → ◡𝑓 ∈ (𝑠 RngIso 𝑟)))
9		risci 36072	. . . . . . . . . . 11 ⊢ ((𝑠 ∈ RingOps ∧ 𝑟 ∈ RingOps ∧ ◡𝑓 ∈ (𝑠 RngIso 𝑟)) → 𝑠 ≃𝑟 𝑟)
10	9	3expia 1119	. . . . . . . . . 10 ⊢ ((𝑠 ∈ RingOps ∧ 𝑟 ∈ RingOps) → (◡𝑓 ∈ (𝑠 RngIso 𝑟) → 𝑠 ≃𝑟 𝑟))
11	10	ancoms 458	. . . . . . . . 9 ⊢ ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps) → (◡𝑓 ∈ (𝑠 RngIso 𝑟) → 𝑠 ≃𝑟 𝑟))
12	8, 11	syld 47	. . . . . . . 8 ⊢ ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps) → (𝑓 ∈ (𝑟 RngIso 𝑠) → 𝑠 ≃𝑟 𝑟))
13	12	exlimdv 1937	. . . . . . 7 ⊢ ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps) → (∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠) → 𝑠 ≃𝑟 𝑟))
14	13	imp 406	. . . . . 6 ⊢ (((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps) ∧ ∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠)) → 𝑠 ≃𝑟 𝑟)
15	6, 14	sylbi 216	. . . . 5 ⊢ (𝑟 ≃𝑟 𝑠 → 𝑠 ≃𝑟 𝑟)
16		vex 3426	. . . . . . 7 ⊢ 𝑡 ∈ V
17	5, 16	isrisc 36070	. . . . . 6 ⊢ (𝑠 ≃𝑟 𝑡 ↔ ((𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps) ∧ ∃𝑔 𝑔 ∈ (𝑠 RngIso 𝑡)))
18		exdistrv 1960	. . . . . . . . . . 11 ⊢ (∃𝑓∃𝑔(𝑓 ∈ (𝑟 RngIso 𝑠) ∧ 𝑔 ∈ (𝑠 RngIso 𝑡)) ↔ (∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠) ∧ ∃𝑔 𝑔 ∈ (𝑠 RngIso 𝑡)))
19		rngoisoco 36067	. . . . . . . . . . . . . 14 ⊢ (((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps) ∧ (𝑓 ∈ (𝑟 RngIso 𝑠) ∧ 𝑔 ∈ (𝑠 RngIso 𝑡))) → (𝑔 ∘ 𝑓) ∈ (𝑟 RngIso 𝑡))
20	19	ex 412	. . . . . . . . . . . . 13 ⊢ ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps) → ((𝑓 ∈ (𝑟 RngIso 𝑠) ∧ 𝑔 ∈ (𝑠 RngIso 𝑡)) → (𝑔 ∘ 𝑓) ∈ (𝑟 RngIso 𝑡)))
21		risci 36072	. . . . . . . . . . . . . . 15 ⊢ ((𝑟 ∈ RingOps ∧ 𝑡 ∈ RingOps ∧ (𝑔 ∘ 𝑓) ∈ (𝑟 RngIso 𝑡)) → 𝑟 ≃𝑟 𝑡)
22	21	3expia 1119	. . . . . . . . . . . . . 14 ⊢ ((𝑟 ∈ RingOps ∧ 𝑡 ∈ RingOps) → ((𝑔 ∘ 𝑓) ∈ (𝑟 RngIso 𝑡) → 𝑟 ≃𝑟 𝑡))
23	22	3adant2 1129	. . . . . . . . . . . . 13 ⊢ ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps) → ((𝑔 ∘ 𝑓) ∈ (𝑟 RngIso 𝑡) → 𝑟 ≃𝑟 𝑡))
24	20, 23	syld 47	. . . . . . . . . . . 12 ⊢ ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps) → ((𝑓 ∈ (𝑟 RngIso 𝑠) ∧ 𝑔 ∈ (𝑠 RngIso 𝑡)) → 𝑟 ≃𝑟 𝑡))
25	24	exlimdvv 1938	. . . . . . . . . . 11 ⊢ ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps) → (∃𝑓∃𝑔(𝑓 ∈ (𝑟 RngIso 𝑠) ∧ 𝑔 ∈ (𝑠 RngIso 𝑡)) → 𝑟 ≃𝑟 𝑡))
26	18, 25	syl5bir 242	. . . . . . . . . 10 ⊢ ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps) → ((∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠) ∧ ∃𝑔 𝑔 ∈ (𝑠 RngIso 𝑡)) → 𝑟 ≃𝑟 𝑡))
27	26	3expb 1118	. . . . . . . . 9 ⊢ ((𝑟 ∈ RingOps ∧ (𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps)) → ((∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠) ∧ ∃𝑔 𝑔 ∈ (𝑠 RngIso 𝑡)) → 𝑟 ≃𝑟 𝑡))
28	27	adantlr 711	. . . . . . . 8 ⊢ (((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps) ∧ (𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps)) → ((∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠) ∧ ∃𝑔 𝑔 ∈ (𝑠 RngIso 𝑡)) → 𝑟 ≃𝑟 𝑡))
29	28	imp 406	. . . . . . 7 ⊢ ((((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps) ∧ (𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps)) ∧ (∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠) ∧ ∃𝑔 𝑔 ∈ (𝑠 RngIso 𝑡))) → 𝑟 ≃𝑟 𝑡)
30	29	an4s 656	. . . . . 6 ⊢ ((((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps) ∧ ∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠)) ∧ ((𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps) ∧ ∃𝑔 𝑔 ∈ (𝑠 RngIso 𝑡))) → 𝑟 ≃𝑟 𝑡)
31	6, 17, 30	syl2anb 597	. . . . 5 ⊢ ((𝑟 ≃𝑟 𝑠 ∧ 𝑠 ≃𝑟 𝑡) → 𝑟 ≃𝑟 𝑡)
32	15, 31	pm3.2i 470	. . . 4 ⊢ ((𝑟 ≃𝑟 𝑠 → 𝑠 ≃𝑟 𝑟) ∧ ((𝑟 ≃𝑟 𝑠 ∧ 𝑠 ≃𝑟 𝑡) → 𝑟 ≃𝑟 𝑡))
33	32	ax-gen 1799	. . 3 ⊢ ∀𝑡((𝑟 ≃𝑟 𝑠 → 𝑠 ≃𝑟 𝑟) ∧ ((𝑟 ≃𝑟 𝑠 ∧ 𝑠 ≃𝑟 𝑡) → 𝑟 ≃𝑟 𝑡))
34	33	gen2 1800	. 2 ⊢ ∀𝑟∀𝑠∀𝑡((𝑟 ≃𝑟 𝑠 → 𝑠 ≃𝑟 𝑟) ∧ ((𝑟 ≃𝑟 𝑠 ∧ 𝑠 ≃𝑟 𝑡) → 𝑟 ≃𝑟 𝑡))
35		dfer2 8457	. 2 ⊢ ( ≃𝑟 Er dom ≃𝑟 ↔ (Rel ≃𝑟 ∧ dom ≃𝑟 = dom ≃𝑟 ∧ ∀𝑟∀𝑠∀𝑡((𝑟 ≃𝑟 𝑠 → 𝑠 ≃𝑟 𝑟) ∧ ((𝑟 ≃𝑟 𝑠 ∧ 𝑠 ≃𝑟 𝑡) → 𝑟 ≃𝑟 𝑡))))
36	2, 3, 34, 35	mpbir3an 1339	1 ⊢ ≃𝑟 Er dom ≃𝑟

Syntax hints:   → wi 4   ∧ wa 395   ∧ w3a 1085  ∀wal 1537   = wceq 1539  ∃wex 1783   ∈ wcel 2108   class class class wbr 5070  ^◡ccnv 5579  dom cdm 5580   ∘ ccom 5584  Rel wrel 5585  (class class class)co 7255   Er wer 8453  RingOpscrngo 35979   RngIso crngiso 36046   ≃_𝑟 crisc 36047

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1799  ax-4 1813  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2110  ax-9 2118  ax-10 2139  ax-11 2156  ax-12 2173  ax-ext 2709  ax-sep 5218  ax-nul 5225  ax-pow 5283  ax-pr 5347  ax-un 7566

This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-3an 1087  df-tru 1542  df-fal 1552  df-ex 1784  df-nf 1788  df-sb 2069  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2817  df-nfc 2888  df-ne 2943  df-ral 3068  df-rex 3069  df-reu 3070  df-rmo 3071  df-rab 3072  df-v 3424  df-sbc 3712  df-csb 3829  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-nul 4254  df-if 4457  df-pw 4532  df-sn 4559  df-pr 4561  df-op 4565  df-uni 4837  df-iun 4923  df-br 5071  df-opab 5133  df-mpt 5154  df-id 5480  df-xp 5586  df-rel 5587  df-cnv 5588  df-co 5589  df-dm 5590  df-rn 5591  df-res 5592  df-ima 5593  df-iota 6376  df-fun 6420  df-fn 6421  df-f 6422  df-f1 6423  df-fo 6424  df-f1o 6425  df-fv 6426  df-riota 7212  df-ov 7258  df-oprab 7259  df-mpo 7260  df-1st 7804  df-2nd 7805  df-er 8456  df-map 8575  df-grpo 28756  df-gid 28757  df-ablo 28808  df-ass 35928  df-exid 35930  df-mgmOLD 35934  df-sgrOLD 35946  df-mndo 35952  df-rngo 35980  df-rngohom 36048  df-rngoiso 36061  df-risc 36068

This theorem is referenced by: (None)