Theorem riscer 35426

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 35421	. . 3 ⊢ ≃𝑟 = {⟨𝑟, 𝑠⟩ ∣ ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps) ∧ ∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠))}
2	1	relopabi 5658	. 2 ⊢ Rel ≃𝑟
3		eqid 2798	. 2 ⊢ dom ≃𝑟 = dom ≃𝑟
4		vex 3444	. . . . . . 7 ⊢ 𝑟 ∈ V
5		vex 3444	. . . . . . 7 ⊢ 𝑠 ∈ V
6	4, 5	isrisc 35423	. . . . . 6 ⊢ (𝑟 ≃𝑟 𝑠 ↔ ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps) ∧ ∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠)))
7		rngoisocnv 35419	. . . . . . . . . 10 ⊢ ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps ∧ 𝑓 ∈ (𝑟 RngIso 𝑠)) → ◡𝑓 ∈ (𝑠 RngIso 𝑟))
8	7	3expia 1118	. . . . . . . . 9 ⊢ ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps) → (𝑓 ∈ (𝑟 RngIso 𝑠) → ◡𝑓 ∈ (𝑠 RngIso 𝑟)))
9		risci 35425	. . . . . . . . . . 11 ⊢ ((𝑠 ∈ RingOps ∧ 𝑟 ∈ RingOps ∧ ◡𝑓 ∈ (𝑠 RngIso 𝑟)) → 𝑠 ≃𝑟 𝑟)
10	9	3expia 1118	. . . . . . . . . 10 ⊢ ((𝑠 ∈ RingOps ∧ 𝑟 ∈ RingOps) → (◡𝑓 ∈ (𝑠 RngIso 𝑟) → 𝑠 ≃𝑟 𝑟))
11	10	ancoms 462	. . . . . . . . 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 1934	. . . . . . 7 ⊢ ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps) → (∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠) → 𝑠 ≃𝑟 𝑟))
14	13	imp 410	. . . . . 6 ⊢ (((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps) ∧ ∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠)) → 𝑠 ≃𝑟 𝑟)
15	6, 14	sylbi 220	. . . . 5 ⊢ (𝑟 ≃𝑟 𝑠 → 𝑠 ≃𝑟 𝑟)
16		vex 3444	. . . . . . 7 ⊢ 𝑡 ∈ V
17	5, 16	isrisc 35423	. . . . . 6 ⊢ (𝑠 ≃𝑟 𝑡 ↔ ((𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps) ∧ ∃𝑔 𝑔 ∈ (𝑠 RngIso 𝑡)))
18		exdistrv 1956	. . . . . . . . . . 11 ⊢ (∃𝑓∃𝑔(𝑓 ∈ (𝑟 RngIso 𝑠) ∧ 𝑔 ∈ (𝑠 RngIso 𝑡)) ↔ (∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠) ∧ ∃𝑔 𝑔 ∈ (𝑠 RngIso 𝑡)))
19		rngoisoco 35420	. . . . . . . . . . . . . 14 ⊢ (((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps) ∧ (𝑓 ∈ (𝑟 RngIso 𝑠) ∧ 𝑔 ∈ (𝑠 RngIso 𝑡))) → (𝑔 ∘ 𝑓) ∈ (𝑟 RngIso 𝑡))
20	19	ex 416	. . . . . . . . . . . . 13 ⊢ ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps) → ((𝑓 ∈ (𝑟 RngIso 𝑠) ∧ 𝑔 ∈ (𝑠 RngIso 𝑡)) → (𝑔 ∘ 𝑓) ∈ (𝑟 RngIso 𝑡)))
21		risci 35425	. . . . . . . . . . . . . . 15 ⊢ ((𝑟 ∈ RingOps ∧ 𝑡 ∈ RingOps ∧ (𝑔 ∘ 𝑓) ∈ (𝑟 RngIso 𝑡)) → 𝑟 ≃𝑟 𝑡)
22	21	3expia 1118	. . . . . . . . . . . . . 14 ⊢ ((𝑟 ∈ RingOps ∧ 𝑡 ∈ RingOps) → ((𝑔 ∘ 𝑓) ∈ (𝑟 RngIso 𝑡) → 𝑟 ≃𝑟 𝑡))
23	22	3adant2 1128	. . . . . . . . . . . . 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 1935	. . . . . . . . . . 11 ⊢ ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps) → (∃𝑓∃𝑔(𝑓 ∈ (𝑟 RngIso 𝑠) ∧ 𝑔 ∈ (𝑠 RngIso 𝑡)) → 𝑟 ≃𝑟 𝑡))
26	18, 25	syl5bir 246	. . . . . . . . . 10 ⊢ ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps) → ((∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠) ∧ ∃𝑔 𝑔 ∈ (𝑠 RngIso 𝑡)) → 𝑟 ≃𝑟 𝑡))
27	26	3expb 1117	. . . . . . . . 9 ⊢ ((𝑟 ∈ RingOps ∧ (𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps)) → ((∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠) ∧ ∃𝑔 𝑔 ∈ (𝑠 RngIso 𝑡)) → 𝑟 ≃𝑟 𝑡))
28	27	adantlr 714	. . . . . . . 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 410	. . . . . . 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 659	. . . . . 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 600	. . . . 5 ⊢ ((𝑟 ≃𝑟 𝑠 ∧ 𝑠 ≃𝑟 𝑡) → 𝑟 ≃𝑟 𝑡)
32	15, 31	pm3.2i 474	. . . 4 ⊢ ((𝑟 ≃𝑟 𝑠 → 𝑠 ≃𝑟 𝑟) ∧ ((𝑟 ≃𝑟 𝑠 ∧ 𝑠 ≃𝑟 𝑡) → 𝑟 ≃𝑟 𝑡))
33	32	ax-gen 1797	. . 3 ⊢ ∀𝑡((𝑟 ≃𝑟 𝑠 → 𝑠 ≃𝑟 𝑟) ∧ ((𝑟 ≃𝑟 𝑠 ∧ 𝑠 ≃𝑟 𝑡) → 𝑟 ≃𝑟 𝑡))
34	33	gen2 1798	. 2 ⊢ ∀𝑟∀𝑠∀𝑡((𝑟 ≃𝑟 𝑠 → 𝑠 ≃𝑟 𝑟) ∧ ((𝑟 ≃𝑟 𝑠 ∧ 𝑠 ≃𝑟 𝑡) → 𝑟 ≃𝑟 𝑡))
35		dfer2 8273	. 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 1338	1 ⊢ ≃𝑟 Er dom ≃𝑟

Syntax hints:   → wi 4   ∧ wa 399   ∧ w3a 1084  ∀wal 1536   = wceq 1538  ∃wex 1781   ∈ wcel 2111   class class class wbr 5030  ^◡ccnv 5518  dom cdm 5519   ∘ ccom 5523  Rel wrel 5524  (class class class)co 7135   Er wer 8269  RingOpscrngo 35332   RngIso crngiso 35399   ≃_𝑟 crisc 35400

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2113  ax-9 2121  ax-10 2142  ax-11 2158  ax-12 2175  ax-ext 2770  ax-sep 5167  ax-nul 5174  ax-pow 5231  ax-pr 5295  ax-un 7441

This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3an 1086  df-tru 1541  df-ex 1782  df-nf 1786  df-sb 2070  df-mo 2598  df-eu 2629  df-clab 2777  df-cleq 2791  df-clel 2870  df-nfc 2938  df-ne 2988  df-ral 3111  df-rex 3112  df-reu 3113  df-rmo 3114  df-rab 3115  df-v 3443  df-sbc 3721  df-csb 3829  df-dif 3884  df-un 3886  df-in 3888  df-ss 3898  df-nul 4244  df-if 4426  df-pw 4499  df-sn 4526  df-pr 4528  df-op 4532  df-uni 4801  df-iun 4883  df-br 5031  df-opab 5093  df-mpt 5111  df-id 5425  df-xp 5525  df-rel 5526  df-cnv 5527  df-co 5528  df-dm 5529  df-rn 5530  df-res 5531  df-ima 5532  df-iota 6283  df-fun 6326  df-fn 6327  df-f 6328  df-f1 6329  df-fo 6330  df-f1o 6331  df-fv 6332  df-riota 7093  df-ov 7138  df-oprab 7139  df-mpo 7140  df-1st 7671  df-2nd 7672  df-er 8272  df-map 8391  df-grpo 28276  df-gid 28277  df-ablo 28328  df-ass 35281  df-exid 35283  df-mgmOLD 35287  df-sgrOLD 35299  df-mndo 35305  df-rngo 35333  df-rngohom 35401  df-rngoiso 35414  df-risc 35421

This theorem is referenced by: (None)