Theorem drnglring 33727

Description: A division ring is a local ring. (Contributed by Thierry Arnoux, 2-Jun-2026.)

Hypothesis

Ref	Expression
drnglring.1	⊢ (𝜑 → 𝐹 ∈ DivRing)

Assertion

Ref	Expression
drnglring	⊢ (𝜑 → 𝐹 ∈ LRing)

Proof of Theorem drnglring

Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		drnglring.1	. . 3 ⊢ (𝜑 → 𝐹 ∈ DivRing)
2		drngnzr 20832	. . 3 ⊢ (𝐹 ∈ DivRing → 𝐹 ∈ NzRing)
3	1, 2	syl 18	. 2 ⊢ (𝜑 → 𝐹 ∈ NzRing)
4	1	ad4antr 744	. . . . . . 7 ⊢ (((((𝜑 ∧ 𝑥 ∈ (Base‘𝐹)) ∧ 𝑦 ∈ (Base‘𝐹)) ∧ (𝑥(+g‘𝐹)𝑦) = (1r‘𝐹)) ∧ ¬ 𝑥 = (0g‘𝐹)) → 𝐹 ∈ DivRing)
5		simp-4r 795	. . . . . . 7 ⊢ (((((𝜑 ∧ 𝑥 ∈ (Base‘𝐹)) ∧ 𝑦 ∈ (Base‘𝐹)) ∧ (𝑥(+g‘𝐹)𝑦) = (1r‘𝐹)) ∧ ¬ 𝑥 = (0g‘𝐹)) → 𝑥 ∈ (Base‘𝐹))
6		neqne 2972	. . . . . . . 8 ⊢ (¬ 𝑥 = (0g‘𝐹) → 𝑥 ≠ (0g‘𝐹))
7	6	adantl 486	. . . . . . 7 ⊢ (((((𝜑 ∧ 𝑥 ∈ (Base‘𝐹)) ∧ 𝑦 ∈ (Base‘𝐹)) ∧ (𝑥(+g‘𝐹)𝑦) = (1r‘𝐹)) ∧ ¬ 𝑥 = (0g‘𝐹)) → 𝑥 ≠ (0g‘𝐹))
8		eqid 2769	. . . . . . . . 9 ⊢ (Base‘𝐹) = (Base‘𝐹)
9		eqid 2769	. . . . . . . . 9 ⊢ (Unit‘𝐹) = (Unit‘𝐹)
10		eqid 2769	. . . . . . . . 9 ⊢ (0g‘𝐹) = (0g‘𝐹)
11	8, 9, 10	drngunit 20818	. . . . . . . 8 ⊢ (𝐹 ∈ DivRing → (𝑥 ∈ (Unit‘𝐹) ↔ (𝑥 ∈ (Base‘𝐹) ∧ 𝑥 ≠ (0g‘𝐹))))
12	11	biimpar 482	. . . . . . 7 ⊢ ((𝐹 ∈ DivRing ∧ (𝑥 ∈ (Base‘𝐹) ∧ 𝑥 ≠ (0g‘𝐹))) → 𝑥 ∈ (Unit‘𝐹))
13	4, 5, 7, 12	syl12anc 849	. . . . . 6 ⊢ (((((𝜑 ∧ 𝑥 ∈ (Base‘𝐹)) ∧ 𝑦 ∈ (Base‘𝐹)) ∧ (𝑥(+g‘𝐹)𝑦) = (1r‘𝐹)) ∧ ¬ 𝑥 = (0g‘𝐹)) → 𝑥 ∈ (Unit‘𝐹))
14	1	ad4antr 744	. . . . . . 7 ⊢ (((((𝜑 ∧ 𝑥 ∈ (Base‘𝐹)) ∧ 𝑦 ∈ (Base‘𝐹)) ∧ (𝑥(+g‘𝐹)𝑦) = (1r‘𝐹)) ∧ ¬ 𝑦 = (0g‘𝐹)) → 𝐹 ∈ DivRing)
15		simpllr 787	. . . . . . 7 ⊢ (((((𝜑 ∧ 𝑥 ∈ (Base‘𝐹)) ∧ 𝑦 ∈ (Base‘𝐹)) ∧ (𝑥(+g‘𝐹)𝑦) = (1r‘𝐹)) ∧ ¬ 𝑦 = (0g‘𝐹)) → 𝑦 ∈ (Base‘𝐹))
16		neqne 2972	. . . . . . . 8 ⊢ (¬ 𝑦 = (0g‘𝐹) → 𝑦 ≠ (0g‘𝐹))
17	16	adantl 486	. . . . . . 7 ⊢ (((((𝜑 ∧ 𝑥 ∈ (Base‘𝐹)) ∧ 𝑦 ∈ (Base‘𝐹)) ∧ (𝑥(+g‘𝐹)𝑦) = (1r‘𝐹)) ∧ ¬ 𝑦 = (0g‘𝐹)) → 𝑦 ≠ (0g‘𝐹))
18	8, 9, 10	drngunit 20818	. . . . . . . 8 ⊢ (𝐹 ∈ DivRing → (𝑦 ∈ (Unit‘𝐹) ↔ (𝑦 ∈ (Base‘𝐹) ∧ 𝑦 ≠ (0g‘𝐹))))
19	18	biimpar 482	. . . . . . 7 ⊢ ((𝐹 ∈ DivRing ∧ (𝑦 ∈ (Base‘𝐹) ∧ 𝑦 ≠ (0g‘𝐹))) → 𝑦 ∈ (Unit‘𝐹))
20	14, 15, 17, 19	syl12anc 849	. . . . . 6 ⊢ (((((𝜑 ∧ 𝑥 ∈ (Base‘𝐹)) ∧ 𝑦 ∈ (Base‘𝐹)) ∧ (𝑥(+g‘𝐹)𝑦) = (1r‘𝐹)) ∧ ¬ 𝑦 = (0g‘𝐹)) → 𝑦 ∈ (Unit‘𝐹))
21		simplll 786	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑥 ∈ (Base‘𝐹)) ∧ 𝑦 ∈ (Base‘𝐹)) ∧ (𝑥(+g‘𝐹)𝑦) = (1r‘𝐹)) → 𝜑)
22		simpr 489	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑥 ∈ (Base‘𝐹)) ∧ 𝑦 ∈ (Base‘𝐹)) ∧ (𝑥(+g‘𝐹)𝑦) = (1r‘𝐹)) → (𝑥(+g‘𝐹)𝑦) = (1r‘𝐹))
23		eqid 2769	. . . . . . . . . . . . 13 ⊢ (1r‘𝐹) = (1r‘𝐹)
24	23, 10	nzrnz 20598	. . . . . . . . . . . 12 ⊢ (𝐹 ∈ NzRing → (1r‘𝐹) ≠ (0g‘𝐹))
25	3, 24	syl 18	. . . . . . . . . . 11 ⊢ (𝜑 → (1r‘𝐹) ≠ (0g‘𝐹))
26	25	ad3antrrr 742	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑥 ∈ (Base‘𝐹)) ∧ 𝑦 ∈ (Base‘𝐹)) ∧ (𝑥(+g‘𝐹)𝑦) = (1r‘𝐹)) → (1r‘𝐹) ≠ (0g‘𝐹))
27	22, 26	eqnetrd 3031	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑥 ∈ (Base‘𝐹)) ∧ 𝑦 ∈ (Base‘𝐹)) ∧ (𝑥(+g‘𝐹)𝑦) = (1r‘𝐹)) → (𝑥(+g‘𝐹)𝑦) ≠ (0g‘𝐹))
28	27	neneqd 2969	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑥 ∈ (Base‘𝐹)) ∧ 𝑦 ∈ (Base‘𝐹)) ∧ (𝑥(+g‘𝐹)𝑦) = (1r‘𝐹)) → ¬ (𝑥(+g‘𝐹)𝑦) = (0g‘𝐹))
29		oveq12 7420	. . . . . . . . . . 11 ⊢ ((𝑥 = (0g‘𝐹) ∧ 𝑦 = (0g‘𝐹)) → (𝑥(+g‘𝐹)𝑦) = ((0g‘𝐹)(+g‘𝐹)(0g‘𝐹)))
30	29	adantl 486	. . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝑥 = (0g‘𝐹) ∧ 𝑦 = (0g‘𝐹))) → (𝑥(+g‘𝐹)𝑦) = ((0g‘𝐹)(+g‘𝐹)(0g‘𝐹)))
31		eqid 2769	. . . . . . . . . . 11 ⊢ (+g‘𝐹) = (+g‘𝐹)
32	1	drnggrpd 20822	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝐹 ∈ Grp)
33	32	adantr 485	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ (𝑥 = (0g‘𝐹) ∧ 𝑦 = (0g‘𝐹))) → 𝐹 ∈ Grp)
34	8, 10, 33	grpidcld 33300	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ (𝑥 = (0g‘𝐹) ∧ 𝑦 = (0g‘𝐹))) → (0g‘𝐹) ∈ (Base‘𝐹))
35	8, 31, 10, 33, 34	grplidd 19036	. . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝑥 = (0g‘𝐹) ∧ 𝑦 = (0g‘𝐹))) → ((0g‘𝐹)(+g‘𝐹)(0g‘𝐹)) = (0g‘𝐹))
36	30, 35	eqtrd 2804	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑥 = (0g‘𝐹) ∧ 𝑦 = (0g‘𝐹))) → (𝑥(+g‘𝐹)𝑦) = (0g‘𝐹))
37	36	stoic1a 1799	. . . . . . . 8 ⊢ ((𝜑 ∧ ¬ (𝑥(+g‘𝐹)𝑦) = (0g‘𝐹)) → ¬ (𝑥 = (0g‘𝐹) ∧ 𝑦 = (0g‘𝐹)))
38	21, 28, 37	syl2anc 595	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑥 ∈ (Base‘𝐹)) ∧ 𝑦 ∈ (Base‘𝐹)) ∧ (𝑥(+g‘𝐹)𝑦) = (1r‘𝐹)) → ¬ (𝑥 = (0g‘𝐹) ∧ 𝑦 = (0g‘𝐹)))
39		ianor 997	. . . . . . 7 ⊢ (¬ (𝑥 = (0g‘𝐹) ∧ 𝑦 = (0g‘𝐹)) ↔ (¬ 𝑥 = (0g‘𝐹) ∨ ¬ 𝑦 = (0g‘𝐹)))
40	38, 39	sylib 221	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑥 ∈ (Base‘𝐹)) ∧ 𝑦 ∈ (Base‘𝐹)) ∧ (𝑥(+g‘𝐹)𝑦) = (1r‘𝐹)) → (¬ 𝑥 = (0g‘𝐹) ∨ ¬ 𝑦 = (0g‘𝐹)))
41	13, 20, 40	orim12da 980	. . . . 5 ⊢ ((((𝜑 ∧ 𝑥 ∈ (Base‘𝐹)) ∧ 𝑦 ∈ (Base‘𝐹)) ∧ (𝑥(+g‘𝐹)𝑦) = (1r‘𝐹)) → (𝑥 ∈ (Unit‘𝐹) ∨ 𝑦 ∈ (Unit‘𝐹)))
42	41	ex 417	. . . 4 ⊢ (((𝜑 ∧ 𝑥 ∈ (Base‘𝐹)) ∧ 𝑦 ∈ (Base‘𝐹)) → ((𝑥(+g‘𝐹)𝑦) = (1r‘𝐹) → (𝑥 ∈ (Unit‘𝐹) ∨ 𝑦 ∈ (Unit‘𝐹))))
43	42	anasss 471	. . 3 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐹) ∧ 𝑦 ∈ (Base‘𝐹))) → ((𝑥(+g‘𝐹)𝑦) = (1r‘𝐹) → (𝑥 ∈ (Unit‘𝐹) ∨ 𝑦 ∈ (Unit‘𝐹))))
44	43	ralrimivva 3214	. 2 ⊢ (𝜑 → ∀𝑥 ∈ (Base‘𝐹)∀𝑦 ∈ (Base‘𝐹)((𝑥(+g‘𝐹)𝑦) = (1r‘𝐹) → (𝑥 ∈ (Unit‘𝐹) ∨ 𝑦 ∈ (Unit‘𝐹))))
45	8, 31, 23, 9	islring 20625	. 2 ⊢ (𝐹 ∈ LRing ↔ (𝐹 ∈ NzRing ∧ ∀𝑥 ∈ (Base‘𝐹)∀𝑦 ∈ (Base‘𝐹)((𝑥(+g‘𝐹)𝑦) = (1r‘𝐹) → (𝑥 ∈ (Unit‘𝐹) ∨ 𝑦 ∈ (Unit‘𝐹)))))
46	3, 44, 45	sylanbrc 594	1 ⊢ (𝜑 → 𝐹 ∈ LRing)

Syntax hints:  ¬ wn 3   → wi 4   ∧ wa 400   ∨ wo 860   = wceq 1567   ∈ wcel 2149   ≠ wne 2964  ∀wral 3085  ‘cfv 6537  (class class class)co 7411  Basecbs 17269  +_gcplusg 17310  0_gc0g 17492  Grpcgrp 19000  1_rcur 20263  Unitcui 20437  NzRingcnzr 20595  LRingclring 20623  DivRingcdr 20813

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1822  ax-4 1836  ax-5 1937  ax-6 1994  ax-7 2035  ax-8 2151  ax-9 2159  ax-10 2182  ax-11 2198  ax-12 2219  ax-ext 2741  ax-rep 5242  ax-sep 5261  ax-nul 5271  ax-pow 5337  ax-pr 5405  ax-un 7733  ax-cnex 11156  ax-resscn 11157  ax-1cn 11158  ax-icn 11159  ax-addcl 11160  ax-addrcl 11161  ax-mulcl 11162  ax-mulrcl 11163  ax-mulcom 11164  ax-addass 11165  ax-mulass 11166  ax-distr 11167  ax-i2m1 11168  ax-1ne0 11169  ax-1rid 11170  ax-rnegex 11171  ax-rrecex 11172  ax-cnre 11173  ax-pre-lttri 11174  ax-pre-lttrn 11175  ax-pre-ltadd 11176  ax-pre-mulgt0 11177

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3or 1102  df-3an 1103  df-tru 1570  df-fal 1580  df-ex 1807  df-nf 1811  df-sb 2098  df-mo 2573  df-eu 2603  df-clab 2748  df-cleq 2761  df-clel 2844  df-nfc 2918  df-ne 2965  df-nel 3071  df-ral 3086  df-rex 3096  df-rmo 3376  df-reu 3377  df-rab 3424  df-v 3465  df-sbc 3754  df-csb 3862  df-dif 3916  df-un 3918  df-in 3920  df-ss 3930  df-pss 3933  df-nul 4295  df-if 4493  df-pw 4569  df-sn 4595  df-pr 4597  df-op 4601  df-uni 4877  df-iun 4962  df-br 5114  df-opab 5178  df-mpt 5197  df-tr 5223  df-id 5557  df-eprel 5562  df-po 5570  df-so 5571  df-fr 5615  df-we 5617  df-xp 5668  df-rel 5669  df-cnv 5670  df-co 5671  df-dm 5672  df-rn 5673  df-res 5674  df-ima 5675  df-pred 6303  df-ord 6364  df-on 6365  df-lim 6366  df-suc 6367  df-iota 6493  df-fun 6539  df-fn 6540  df-f 6541  df-f1 6542  df-fo 6543  df-f1o 6544  df-fv 6545  df-riota 7368  df-ov 7414  df-oprab 7415  df-mpo 7416  df-om 7863  df-2nd 7987  df-tpos 8222  df-frecs 8278  df-wrecs 8309  df-recs 8358  df-rdg 8397  df-er 8694  df-en 8944  df-dom 8945  df-sdom 8946  df-pnf 11245  df-mnf 11246  df-xr 11247  df-ltxr 11248  df-le 11249  df-sub 11443  df-neg 11444  df-nn 12234  df-2 12303  df-3 12304  df-sets 17224  df-slot 17242  df-ndx 17254  df-base 17270  df-plusg 17323  df-mulr 17324  df-0g 17494  df-mgm 18698  df-sgrp 18777  df-mnd 18793  df-grp 19003  df-minusg 19004  df-cmn 19852  df-abl 19853  df-mgp 20217  df-rng 20231  df-ur 20264  df-ring 20317  df-oppr 20419  df-dvdsr 20439  df-unit 20440  df-nzr 20596  df-lring 20624  df-drng 20815

This theorem is referenced by: (None)