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Theorem isdrngo3 34244
Description: A division ring is a ring in which 1 ≠ 0 and every nonzero element is invertible. (Contributed by Jeff Madsen, 10-Jun-2010.)
Hypotheses
Ref Expression
isdivrng1.1 𝐺 = (1st𝑅)
isdivrng1.2 𝐻 = (2nd𝑅)
isdivrng1.3 𝑍 = (GId‘𝐺)
isdivrng1.4 𝑋 = ran 𝐺
isdivrng2.5 𝑈 = (GId‘𝐻)
Assertion
Ref Expression
isdrngo3 (𝑅 ∈ DivRingOps ↔ (𝑅 ∈ RingOps ∧ (𝑈𝑍 ∧ ∀𝑥 ∈ (𝑋 ∖ {𝑍})∃𝑦𝑋 (𝑦𝐻𝑥) = 𝑈)))
Distinct variable groups:   𝑥,𝐻,𝑦   𝑥,𝑋,𝑦   𝑥,𝑍,𝑦   𝑥,𝑅,𝑦   𝑥,𝑈,𝑦
Allowed substitution hints:   𝐺(𝑥,𝑦)

Proof of Theorem isdrngo3
StepHypRef Expression
1 isdivrng1.1 . . 3 𝐺 = (1st𝑅)
2 isdivrng1.2 . . 3 𝐻 = (2nd𝑅)
3 isdivrng1.3 . . 3 𝑍 = (GId‘𝐺)
4 isdivrng1.4 . . 3 𝑋 = ran 𝐺
5 isdivrng2.5 . . 3 𝑈 = (GId‘𝐻)
61, 2, 3, 4, 5isdrngo2 34243 . 2 (𝑅 ∈ DivRingOps ↔ (𝑅 ∈ RingOps ∧ (𝑈𝑍 ∧ ∀𝑥 ∈ (𝑋 ∖ {𝑍})∃𝑦 ∈ (𝑋 ∖ {𝑍})(𝑦𝐻𝑥) = 𝑈)))
7 eldifi 3931 . . . . . 6 (𝑥 ∈ (𝑋 ∖ {𝑍}) → 𝑥𝑋)
8 difss 3936 . . . . . . . 8 (𝑋 ∖ {𝑍}) ⊆ 𝑋
9 ssrexv 3864 . . . . . . . 8 ((𝑋 ∖ {𝑍}) ⊆ 𝑋 → (∃𝑦 ∈ (𝑋 ∖ {𝑍})(𝑦𝐻𝑥) = 𝑈 → ∃𝑦𝑋 (𝑦𝐻𝑥) = 𝑈))
108, 9ax-mp 5 . . . . . . 7 (∃𝑦 ∈ (𝑋 ∖ {𝑍})(𝑦𝐻𝑥) = 𝑈 → ∃𝑦𝑋 (𝑦𝐻𝑥) = 𝑈)
11 neeq1 3034 . . . . . . . . . . . . . . . 16 ((𝑦𝐻𝑥) = 𝑈 → ((𝑦𝐻𝑥) ≠ 𝑍𝑈𝑍))
1211biimparc 472 . . . . . . . . . . . . . . 15 ((𝑈𝑍 ∧ (𝑦𝐻𝑥) = 𝑈) → (𝑦𝐻𝑥) ≠ 𝑍)
133, 4, 1, 2rngolz 34207 . . . . . . . . . . . . . . . . . 18 ((𝑅 ∈ RingOps ∧ 𝑥𝑋) → (𝑍𝐻𝑥) = 𝑍)
14 oveq1 6886 . . . . . . . . . . . . . . . . . . 19 (𝑦 = 𝑍 → (𝑦𝐻𝑥) = (𝑍𝐻𝑥))
1514eqeq1d 2802 . . . . . . . . . . . . . . . . . 18 (𝑦 = 𝑍 → ((𝑦𝐻𝑥) = 𝑍 ↔ (𝑍𝐻𝑥) = 𝑍))
1613, 15syl5ibrcom 239 . . . . . . . . . . . . . . . . 17 ((𝑅 ∈ RingOps ∧ 𝑥𝑋) → (𝑦 = 𝑍 → (𝑦𝐻𝑥) = 𝑍))
1716necon3d 2993 . . . . . . . . . . . . . . . 16 ((𝑅 ∈ RingOps ∧ 𝑥𝑋) → ((𝑦𝐻𝑥) ≠ 𝑍𝑦𝑍))
1817imp 396 . . . . . . . . . . . . . . 15 (((𝑅 ∈ RingOps ∧ 𝑥𝑋) ∧ (𝑦𝐻𝑥) ≠ 𝑍) → 𝑦𝑍)
1912, 18sylan2 587 . . . . . . . . . . . . . 14 (((𝑅 ∈ RingOps ∧ 𝑥𝑋) ∧ (𝑈𝑍 ∧ (𝑦𝐻𝑥) = 𝑈)) → 𝑦𝑍)
2019an4s 651 . . . . . . . . . . . . 13 (((𝑅 ∈ RingOps ∧ 𝑈𝑍) ∧ (𝑥𝑋 ∧ (𝑦𝐻𝑥) = 𝑈)) → 𝑦𝑍)
2120anassrs 460 . . . . . . . . . . . 12 ((((𝑅 ∈ RingOps ∧ 𝑈𝑍) ∧ 𝑥𝑋) ∧ (𝑦𝐻𝑥) = 𝑈) → 𝑦𝑍)
22 pm3.2 462 . . . . . . . . . . . 12 (𝑦𝑋 → (𝑦𝑍 → (𝑦𝑋𝑦𝑍)))
2321, 22syl5com 31 . . . . . . . . . . 11 ((((𝑅 ∈ RingOps ∧ 𝑈𝑍) ∧ 𝑥𝑋) ∧ (𝑦𝐻𝑥) = 𝑈) → (𝑦𝑋 → (𝑦𝑋𝑦𝑍)))
24 eldifsn 4507 . . . . . . . . . . 11 (𝑦 ∈ (𝑋 ∖ {𝑍}) ↔ (𝑦𝑋𝑦𝑍))
2523, 24syl6ibr 244 . . . . . . . . . 10 ((((𝑅 ∈ RingOps ∧ 𝑈𝑍) ∧ 𝑥𝑋) ∧ (𝑦𝐻𝑥) = 𝑈) → (𝑦𝑋𝑦 ∈ (𝑋 ∖ {𝑍})))
2625imdistanda 568 . . . . . . . . 9 (((𝑅 ∈ RingOps ∧ 𝑈𝑍) ∧ 𝑥𝑋) → (((𝑦𝐻𝑥) = 𝑈𝑦𝑋) → ((𝑦𝐻𝑥) = 𝑈𝑦 ∈ (𝑋 ∖ {𝑍}))))
27 ancom 453 . . . . . . . . 9 ((𝑦𝑋 ∧ (𝑦𝐻𝑥) = 𝑈) ↔ ((𝑦𝐻𝑥) = 𝑈𝑦𝑋))
28 ancom 453 . . . . . . . . 9 ((𝑦 ∈ (𝑋 ∖ {𝑍}) ∧ (𝑦𝐻𝑥) = 𝑈) ↔ ((𝑦𝐻𝑥) = 𝑈𝑦 ∈ (𝑋 ∖ {𝑍})))
2926, 27, 283imtr4g 288 . . . . . . . 8 (((𝑅 ∈ RingOps ∧ 𝑈𝑍) ∧ 𝑥𝑋) → ((𝑦𝑋 ∧ (𝑦𝐻𝑥) = 𝑈) → (𝑦 ∈ (𝑋 ∖ {𝑍}) ∧ (𝑦𝐻𝑥) = 𝑈)))
3029reximdv2 3195 . . . . . . 7 (((𝑅 ∈ RingOps ∧ 𝑈𝑍) ∧ 𝑥𝑋) → (∃𝑦𝑋 (𝑦𝐻𝑥) = 𝑈 → ∃𝑦 ∈ (𝑋 ∖ {𝑍})(𝑦𝐻𝑥) = 𝑈))
3110, 30impbid2 218 . . . . . 6 (((𝑅 ∈ RingOps ∧ 𝑈𝑍) ∧ 𝑥𝑋) → (∃𝑦 ∈ (𝑋 ∖ {𝑍})(𝑦𝐻𝑥) = 𝑈 ↔ ∃𝑦𝑋 (𝑦𝐻𝑥) = 𝑈))
327, 31sylan2 587 . . . . 5 (((𝑅 ∈ RingOps ∧ 𝑈𝑍) ∧ 𝑥 ∈ (𝑋 ∖ {𝑍})) → (∃𝑦 ∈ (𝑋 ∖ {𝑍})(𝑦𝐻𝑥) = 𝑈 ↔ ∃𝑦𝑋 (𝑦𝐻𝑥) = 𝑈))
3332ralbidva 3167 . . . 4 ((𝑅 ∈ RingOps ∧ 𝑈𝑍) → (∀𝑥 ∈ (𝑋 ∖ {𝑍})∃𝑦 ∈ (𝑋 ∖ {𝑍})(𝑦𝐻𝑥) = 𝑈 ↔ ∀𝑥 ∈ (𝑋 ∖ {𝑍})∃𝑦𝑋 (𝑦𝐻𝑥) = 𝑈))
3433pm5.32da 575 . . 3 (𝑅 ∈ RingOps → ((𝑈𝑍 ∧ ∀𝑥 ∈ (𝑋 ∖ {𝑍})∃𝑦 ∈ (𝑋 ∖ {𝑍})(𝑦𝐻𝑥) = 𝑈) ↔ (𝑈𝑍 ∧ ∀𝑥 ∈ (𝑋 ∖ {𝑍})∃𝑦𝑋 (𝑦𝐻𝑥) = 𝑈)))
3534pm5.32i 571 . 2 ((𝑅 ∈ RingOps ∧ (𝑈𝑍 ∧ ∀𝑥 ∈ (𝑋 ∖ {𝑍})∃𝑦 ∈ (𝑋 ∖ {𝑍})(𝑦𝐻𝑥) = 𝑈)) ↔ (𝑅 ∈ RingOps ∧ (𝑈𝑍 ∧ ∀𝑥 ∈ (𝑋 ∖ {𝑍})∃𝑦𝑋 (𝑦𝐻𝑥) = 𝑈)))
366, 35bitri 267 1 (𝑅 ∈ DivRingOps ↔ (𝑅 ∈ RingOps ∧ (𝑈𝑍 ∧ ∀𝑥 ∈ (𝑋 ∖ {𝑍})∃𝑦𝑋 (𝑦𝐻𝑥) = 𝑈)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 198  wa 385   = wceq 1653  wcel 2157  wne 2972  wral 3090  wrex 3091  cdif 3767  wss 3770  {csn 4369  ran crn 5314  cfv 6102  (class class class)co 6879  1st c1st 7400  2nd c2nd 7401  GIdcgi 27869  RingOpscrngo 34179  DivRingOpscdrng 34233
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1891  ax-4 1905  ax-5 2006  ax-6 2072  ax-7 2107  ax-8 2159  ax-9 2166  ax-10 2185  ax-11 2200  ax-12 2213  ax-13 2378  ax-ext 2778  ax-rep 4965  ax-sep 4976  ax-nul 4984  ax-pow 5036  ax-pr 5098  ax-un 7184
This theorem depends on definitions:  df-bi 199  df-an 386  df-or 875  df-3or 1109  df-3an 1110  df-tru 1657  df-ex 1876  df-nf 1880  df-sb 2065  df-mo 2592  df-eu 2610  df-clab 2787  df-cleq 2793  df-clel 2796  df-nfc 2931  df-ne 2973  df-ral 3095  df-rex 3096  df-reu 3097  df-rmo 3098  df-rab 3099  df-v 3388  df-sbc 3635  df-csb 3730  df-dif 3773  df-un 3775  df-in 3777  df-ss 3784  df-pss 3786  df-nul 4117  df-if 4279  df-pw 4352  df-sn 4370  df-pr 4372  df-tp 4374  df-op 4376  df-uni 4630  df-iun 4713  df-br 4845  df-opab 4907  df-mpt 4924  df-tr 4947  df-id 5221  df-eprel 5226  df-po 5234  df-so 5235  df-fr 5272  df-we 5274  df-xp 5319  df-rel 5320  df-cnv 5321  df-co 5322  df-dm 5323  df-rn 5324  df-res 5325  df-ima 5326  df-ord 5945  df-on 5946  df-lim 5947  df-suc 5948  df-iota 6065  df-fun 6104  df-fn 6105  df-f 6106  df-f1 6107  df-fo 6108  df-f1o 6109  df-fv 6110  df-riota 6840  df-ov 6882  df-om 7301  df-1st 7402  df-2nd 7403  df-1o 7800  df-er 7983  df-en 8197  df-dom 8198  df-sdom 8199  df-fin 8200  df-grpo 27872  df-gid 27873  df-ginv 27874  df-ablo 27924  df-ass 34128  df-exid 34130  df-mgmOLD 34134  df-sgrOLD 34146  df-mndo 34152  df-rngo 34180  df-drngo 34234
This theorem is referenced by:  isfldidl  34353
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