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Theorem riscer 33446
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.
StepHypRef Expression
1 df-risc 33441 . . 3 𝑟 = {⟨𝑟, 𝑠⟩ ∣ ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps) ∧ ∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠))}
21relopabi 5210 . 2 Rel ≃𝑟
3 eqid 2621 . 2 dom ≃𝑟 = dom ≃𝑟
4 vex 3192 . . . . . . 7 𝑟 ∈ V
5 vex 3192 . . . . . . 7 𝑠 ∈ V
64, 5isrisc 33443 . . . . . 6 (𝑟𝑟 𝑠 ↔ ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps) ∧ ∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠)))
7 rngoisocnv 33439 . . . . . . . . . 10 ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps ∧ 𝑓 ∈ (𝑟 RngIso 𝑠)) → 𝑓 ∈ (𝑠 RngIso 𝑟))
873expia 1264 . . . . . . . . 9 ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps) → (𝑓 ∈ (𝑟 RngIso 𝑠) → 𝑓 ∈ (𝑠 RngIso 𝑟)))
9 risci 33445 . . . . . . . . . . 11 ((𝑠 ∈ RingOps ∧ 𝑟 ∈ RingOps ∧ 𝑓 ∈ (𝑠 RngIso 𝑟)) → 𝑠𝑟 𝑟)
1093expia 1264 . . . . . . . . . 10 ((𝑠 ∈ RingOps ∧ 𝑟 ∈ RingOps) → (𝑓 ∈ (𝑠 RngIso 𝑟) → 𝑠𝑟 𝑟))
1110ancoms 469 . . . . . . . . 9 ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps) → (𝑓 ∈ (𝑠 RngIso 𝑟) → 𝑠𝑟 𝑟))
128, 11syld 47 . . . . . . . 8 ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps) → (𝑓 ∈ (𝑟 RngIso 𝑠) → 𝑠𝑟 𝑟))
1312exlimdv 1858 . . . . . . 7 ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps) → (∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠) → 𝑠𝑟 𝑟))
1413imp 445 . . . . . 6 (((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps) ∧ ∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠)) → 𝑠𝑟 𝑟)
156, 14sylbi 207 . . . . 5 (𝑟𝑟 𝑠𝑠𝑟 𝑟)
16 vex 3192 . . . . . . 7 𝑡 ∈ V
175, 16isrisc 33443 . . . . . 6 (𝑠𝑟 𝑡 ↔ ((𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps) ∧ ∃𝑔 𝑔 ∈ (𝑠 RngIso 𝑡)))
18 eeanv 2181 . . . . . . . . . . 11 (∃𝑓𝑔(𝑓 ∈ (𝑟 RngIso 𝑠) ∧ 𝑔 ∈ (𝑠 RngIso 𝑡)) ↔ (∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠) ∧ ∃𝑔 𝑔 ∈ (𝑠 RngIso 𝑡)))
19 rngoisoco 33440 . . . . . . . . . . . . . 14 (((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps) ∧ (𝑓 ∈ (𝑟 RngIso 𝑠) ∧ 𝑔 ∈ (𝑠 RngIso 𝑡))) → (𝑔𝑓) ∈ (𝑟 RngIso 𝑡))
2019ex 450 . . . . . . . . . . . . 13 ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps) → ((𝑓 ∈ (𝑟 RngIso 𝑠) ∧ 𝑔 ∈ (𝑠 RngIso 𝑡)) → (𝑔𝑓) ∈ (𝑟 RngIso 𝑡)))
21 risci 33445 . . . . . . . . . . . . . . 15 ((𝑟 ∈ RingOps ∧ 𝑡 ∈ RingOps ∧ (𝑔𝑓) ∈ (𝑟 RngIso 𝑡)) → 𝑟𝑟 𝑡)
22213expia 1264 . . . . . . . . . . . . . 14 ((𝑟 ∈ RingOps ∧ 𝑡 ∈ RingOps) → ((𝑔𝑓) ∈ (𝑟 RngIso 𝑡) → 𝑟𝑟 𝑡))
23223adant2 1078 . . . . . . . . . . . . 13 ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps) → ((𝑔𝑓) ∈ (𝑟 RngIso 𝑡) → 𝑟𝑟 𝑡))
2420, 23syld 47 . . . . . . . . . . . 12 ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps) → ((𝑓 ∈ (𝑟 RngIso 𝑠) ∧ 𝑔 ∈ (𝑠 RngIso 𝑡)) → 𝑟𝑟 𝑡))
2524exlimdvv 1859 . . . . . . . . . . 11 ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps) → (∃𝑓𝑔(𝑓 ∈ (𝑟 RngIso 𝑠) ∧ 𝑔 ∈ (𝑠 RngIso 𝑡)) → 𝑟𝑟 𝑡))
2618, 25syl5bir 233 . . . . . . . . . 10 ((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps) → ((∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠) ∧ ∃𝑔 𝑔 ∈ (𝑠 RngIso 𝑡)) → 𝑟𝑟 𝑡))
27263expb 1263 . . . . . . . . 9 ((𝑟 ∈ RingOps ∧ (𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps)) → ((∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠) ∧ ∃𝑔 𝑔 ∈ (𝑠 RngIso 𝑡)) → 𝑟𝑟 𝑡))
2827adantlr 750 . . . . . . . 8 (((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps) ∧ (𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps)) → ((∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠) ∧ ∃𝑔 𝑔 ∈ (𝑠 RngIso 𝑡)) → 𝑟𝑟 𝑡))
2928imp 445 . . . . . . 7 ((((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps) ∧ (𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps)) ∧ (∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠) ∧ ∃𝑔 𝑔 ∈ (𝑠 RngIso 𝑡))) → 𝑟𝑟 𝑡)
3029an4s 868 . . . . . 6 ((((𝑟 ∈ RingOps ∧ 𝑠 ∈ RingOps) ∧ ∃𝑓 𝑓 ∈ (𝑟 RngIso 𝑠)) ∧ ((𝑠 ∈ RingOps ∧ 𝑡 ∈ RingOps) ∧ ∃𝑔 𝑔 ∈ (𝑠 RngIso 𝑡))) → 𝑟𝑟 𝑡)
316, 17, 30syl2anb 496 . . . . 5 ((𝑟𝑟 𝑠𝑠𝑟 𝑡) → 𝑟𝑟 𝑡)
3215, 31pm3.2i 471 . . . 4 ((𝑟𝑟 𝑠𝑠𝑟 𝑟) ∧ ((𝑟𝑟 𝑠𝑠𝑟 𝑡) → 𝑟𝑟 𝑡))
3332ax-gen 1719 . . 3 𝑡((𝑟𝑟 𝑠𝑠𝑟 𝑟) ∧ ((𝑟𝑟 𝑠𝑠𝑟 𝑡) → 𝑟𝑟 𝑡))
3433gen2 1720 . 2 𝑟𝑠𝑡((𝑟𝑟 𝑠𝑠𝑟 𝑟) ∧ ((𝑟𝑟 𝑠𝑠𝑟 𝑡) → 𝑟𝑟 𝑡))
35 dfer2 7695 . 2 ( ≃𝑟 Er dom ≃𝑟 ↔ (Rel ≃𝑟 ∧ dom ≃𝑟 = dom ≃𝑟 ∧ ∀𝑟𝑠𝑡((𝑟𝑟 𝑠𝑠𝑟 𝑟) ∧ ((𝑟𝑟 𝑠𝑠𝑟 𝑡) → 𝑟𝑟 𝑡))))
362, 3, 34, 35mpbir3an 1242 1 𝑟 Er dom ≃𝑟
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 384  w3a 1036  wal 1478   = wceq 1480  wex 1701  wcel 1987   class class class wbr 4618  ccnv 5078  dom cdm 5079  ccom 5083  Rel wrel 5084  (class class class)co 6610   Er wer 7691  RingOpscrngo 33352   RngIso crngiso 33419  𝑟 crisc 33420
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1719  ax-4 1734  ax-5 1836  ax-6 1885  ax-7 1932  ax-8 1989  ax-9 1996  ax-10 2016  ax-11 2031  ax-12 2044  ax-13 2245  ax-ext 2601  ax-sep 4746  ax-nul 4754  ax-pow 4808  ax-pr 4872  ax-un 6909
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1038  df-tru 1483  df-ex 1702  df-nf 1707  df-sb 1878  df-eu 2473  df-mo 2474  df-clab 2608  df-cleq 2614  df-clel 2617  df-nfc 2750  df-ne 2791  df-ral 2912  df-rex 2913  df-reu 2914  df-rmo 2915  df-rab 2916  df-v 3191  df-sbc 3422  df-csb 3519  df-dif 3562  df-un 3564  df-in 3566  df-ss 3573  df-nul 3897  df-if 4064  df-pw 4137  df-sn 4154  df-pr 4156  df-op 4160  df-uni 4408  df-iun 4492  df-br 4619  df-opab 4679  df-mpt 4680  df-id 4994  df-xp 5085  df-rel 5086  df-cnv 5087  df-co 5088  df-dm 5089  df-rn 5090  df-res 5091  df-ima 5092  df-iota 5815  df-fun 5854  df-fn 5855  df-f 5856  df-f1 5857  df-fo 5858  df-f1o 5859  df-fv 5860  df-riota 6571  df-ov 6613  df-oprab 6614  df-mpt2 6615  df-1st 7120  df-2nd 7121  df-er 7694  df-map 7811  df-grpo 27214  df-gid 27215  df-ablo 27266  df-ass 33301  df-exid 33303  df-mgmOLD 33307  df-sgrOLD 33319  df-mndo 33325  df-rngo 33353  df-rngohom 33421  df-rngoiso 33434  df-risc 33441
This theorem is referenced by: (None)
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