Theorem riscer 35260

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 35255	. . 3 ⊢ ≃𝑟 = {⟨𝑟, 𝑠⟩ ∣ ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps) ∧ ∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠))}
2	1	relopabi 5689	. 2 ⊢ Rel ≃𝑟
3		eqid 2821	. 2 ⊢ dom ≃𝑟 = dom ≃𝑟
4		vex 3498	. . . . . . 7 ⊢ 𝑟 ∈ V
5		vex 3498	. . . . . . 7 ⊢ 𝑠 ∈ V
6	4, 5	isrisc 35257	. . . . . 6 ⊢ (𝑟 ≃𝑟 𝑠 ↔ ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps) ∧ ∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠)))
7		rngoisocnv 35253	. . . . . . . . . 10 ⊢ ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps ∧ 𝑓 ∈ (𝑟 RngIso 𝑠)) → ◡𝑓 ∈ (𝑠 RngIso 𝑟))
8	7	3expia 1117	. . . . . . . . 9 ⊢ ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps) → (𝑓 ∈ (𝑟 RngIso 𝑠) → ◡𝑓 ∈ (𝑠 RngIso 𝑟)))
9		risci 35259	. . . . . . . . . . 11 ⊢ ((𝑠 ∈ RingOps ∧ 𝑟 ∈ RingOps ∧ ◡𝑓 ∈ (𝑠 RngIso 𝑟)) → 𝑠 ≃𝑟 𝑟)
10	9	3expia 1117	. . . . . . . . . 10 ⊢ ((𝑠 ∈ RingOps ∧ 𝑟 ∈ RingOps) → (◡𝑓 ∈ (𝑠 RngIso 𝑟) → 𝑠 ≃𝑟 𝑟))
11	10	ancoms 461	. . . . . . . . 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 1930	. . . . . . 7 ⊢ ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps) → (∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠) → 𝑠 ≃𝑟 𝑟))
14	13	imp 409	. . . . . 6 ⊢ (((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps) ∧ ∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠)) → 𝑠 ≃𝑟 𝑟)
15	6, 14	sylbi 219	. . . . 5 ⊢ (𝑟 ≃𝑟 𝑠 → 𝑠 ≃𝑟 𝑟)
16		vex 3498	. . . . . . 7 ⊢ 𝑡 ∈ V
17	5, 16	isrisc 35257	. . . . . 6 ⊢ (𝑠 ≃𝑟 𝑡 ↔ ((𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps) ∧ ∃𝑔 𝑔 ∈ (𝑠 RngIso 𝑡)))
18		exdistrv 1952	. . . . . . . . . . 11 ⊢ (∃𝑓∃𝑔(𝑓 ∈ (𝑟 RngIso 𝑠) ∧ 𝑔 ∈ (𝑠 RngIso 𝑡)) ↔ (∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠) ∧ ∃𝑔 𝑔 ∈ (𝑠 RngIso 𝑡)))
19		rngoisoco 35254	. . . . . . . . . . . . . 14 ⊢ (((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps) ∧ (𝑓 ∈ (𝑟 RngIso 𝑠) ∧ 𝑔 ∈ (𝑠 RngIso 𝑡))) → (𝑔 ∘ 𝑓) ∈ (𝑟 RngIso 𝑡))
20	19	ex 415	. . . . . . . . . . . . 13 ⊢ ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps) → ((𝑓 ∈ (𝑟 RngIso 𝑠) ∧ 𝑔 ∈ (𝑠 RngIso 𝑡)) → (𝑔 ∘ 𝑓) ∈ (𝑟 RngIso 𝑡)))
21		risci 35259	. . . . . . . . . . . . . . 15 ⊢ ((𝑟 ∈ RingOps ∧ 𝑡 ∈ RingOps ∧ (𝑔 ∘ 𝑓) ∈ (𝑟 RngIso 𝑡)) → 𝑟 ≃𝑟 𝑡)
22	21	3expia 1117	. . . . . . . . . . . . . 14 ⊢ ((𝑟 ∈ RingOps ∧ 𝑡 ∈ RingOps) → ((𝑔 ∘ 𝑓) ∈ (𝑟 RngIso 𝑡) → 𝑟 ≃𝑟 𝑡))
23	22	3adant2 1127	. . . . . . . . . . . . 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 1931	. . . . . . . . . . 11 ⊢ ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps) → (∃𝑓∃𝑔(𝑓 ∈ (𝑟 RngIso 𝑠) ∧ 𝑔 ∈ (𝑠 RngIso 𝑡)) → 𝑟 ≃𝑟 𝑡))
26	18, 25	syl5bir 245	. . . . . . . . . 10 ⊢ ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps) → ((∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠) ∧ ∃𝑔 𝑔 ∈ (𝑠 RngIso 𝑡)) → 𝑟 ≃𝑟 𝑡))
27	26	3expb 1116	. . . . . . . . 9 ⊢ ((𝑟 ∈ RingOps ∧ (𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps)) → ((∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠) ∧ ∃𝑔 𝑔 ∈ (𝑠 RngIso 𝑡)) → 𝑟 ≃𝑟 𝑡))
28	27	adantlr 713	. . . . . . . 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 409	. . . . . . 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 658	. . . . . 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 599	. . . . 5 ⊢ ((𝑟 ≃𝑟 𝑠 ∧ 𝑠 ≃𝑟 𝑡) → 𝑟 ≃𝑟 𝑡)
32	15, 31	pm3.2i 473	. . . 4 ⊢ ((𝑟 ≃𝑟 𝑠 → 𝑠 ≃𝑟 𝑟) ∧ ((𝑟 ≃𝑟 𝑠 ∧ 𝑠 ≃𝑟 𝑡) → 𝑟 ≃𝑟 𝑡))
33	32	ax-gen 1792	. . 3 ⊢ ∀𝑡((𝑟 ≃𝑟 𝑠 → 𝑠 ≃𝑟 𝑟) ∧ ((𝑟 ≃𝑟 𝑠 ∧ 𝑠 ≃𝑟 𝑡) → 𝑟 ≃𝑟 𝑡))
34	33	gen2 1793	. 2 ⊢ ∀𝑟∀𝑠∀𝑡((𝑟 ≃𝑟 𝑠 → 𝑠 ≃𝑟 𝑟) ∧ ((𝑟 ≃𝑟 𝑠 ∧ 𝑠 ≃𝑟 𝑡) → 𝑟 ≃𝑟 𝑡))
35		dfer2 8284	. 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 1337	1 ⊢ ≃𝑟 Er dom ≃𝑟

Syntax hints:   → wi 4   ∧ wa 398   ∧ w3a 1083  ∀wal 1531   = wceq 1533  ∃wex 1776   ∈ wcel 2110   class class class wbr 5059  ^◡ccnv 5549  dom cdm 5550   ∘ ccom 5554  Rel wrel 5555  (class class class)co 7150   Er wer 8280  RingOpscrngo 35166   RngIso crngiso 35233   ≃_𝑟 crisc 35234

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1907  ax-6 1966  ax-7 2011  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2156  ax-12 2172  ax-ext 2793  ax-sep 5196  ax-nul 5203  ax-pow 5259  ax-pr 5322  ax-un 7455

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1536  df-ex 1777  df-nf 1781  df-sb 2066  df-mo 2618  df-eu 2650  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ne 3017  df-ral 3143  df-rex 3144  df-reu 3145  df-rmo 3146  df-rab 3147  df-v 3497  df-sbc 3773  df-csb 3884  df-dif 3939  df-un 3941  df-in 3943  df-ss 3952  df-nul 4292  df-if 4468  df-pw 4541  df-sn 4562  df-pr 4564  df-op 4568  df-uni 4833  df-iun 4914  df-br 5060  df-opab 5122  df-mpt 5140  df-id 5455  df-xp 5556  df-rel 5557  df-cnv 5558  df-co 5559  df-dm 5560  df-rn 5561  df-res 5562  df-ima 5563  df-iota 6309  df-fun 6352  df-fn 6353  df-f 6354  df-f1 6355  df-fo 6356  df-f1o 6357  df-fv 6358  df-riota 7108  df-ov 7153  df-oprab 7154  df-mpo 7155  df-1st 7683  df-2nd 7684  df-er 8283  df-map 8402  df-grpo 28264  df-gid 28265  df-ablo 28316  df-ass 35115  df-exid 35117  df-mgmOLD 35121  df-sgrOLD 35133  df-mndo 35139  df-rngo 35167  df-rngohom 35235  df-rngoiso 35248  df-risc 35255

This theorem is referenced by: (None)