ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  opprring GIF version

Theorem opprring 14091
Description: An opposite ring is a ring. (Contributed by Mario Carneiro, 1-Dec-2014.) (Revised by Mario Carneiro, 30-Aug-2015.)
Hypothesis
Ref Expression
opprbas.1 𝑂 = (oppr𝑅)
Assertion
Ref Expression
opprring (𝑅 ∈ Ring → 𝑂 ∈ Ring)

Proof of Theorem opprring
Dummy variables 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 opprbas.1 . . 3 𝑂 = (oppr𝑅)
2 eqid 2231 . . 3 (Base‘𝑅) = (Base‘𝑅)
31, 2opprbasg 14087 . 2 (𝑅 ∈ Ring → (Base‘𝑅) = (Base‘𝑂))
4 eqid 2231 . . 3 (+g𝑅) = (+g𝑅)
51, 4oppraddg 14088 . 2 (𝑅 ∈ Ring → (+g𝑅) = (+g𝑂))
6 eqidd 2232 . 2 (𝑅 ∈ Ring → (.r𝑂) = (.r𝑂))
7 ringgrp 14013 . . 3 (𝑅 ∈ Ring → 𝑅 ∈ Grp)
8 eqidd 2232 . . . 4 (𝑅 ∈ Ring → (Base‘𝑅) = (Base‘𝑅))
95oveqdr 6045 . . . 4 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅))) → (𝑥(+g𝑅)𝑦) = (𝑥(+g𝑂)𝑦))
108, 3, 9grppropd 13599 . . 3 (𝑅 ∈ Ring → (𝑅 ∈ Grp ↔ 𝑂 ∈ Grp))
117, 10mpbid 147 . 2 (𝑅 ∈ Ring → 𝑂 ∈ Grp)
12 eqid 2231 . . . 4 (.r𝑅) = (.r𝑅)
13 eqid 2231 . . . 4 (.r𝑂) = (.r𝑂)
142, 12, 1, 13opprmulg 14083 . . 3 ((𝑅 ∈ Ring ∧ 𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅)) → (𝑥(.r𝑂)𝑦) = (𝑦(.r𝑅)𝑥))
152, 12ringcl 14025 . . . 4 ((𝑅 ∈ Ring ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑥 ∈ (Base‘𝑅)) → (𝑦(.r𝑅)𝑥) ∈ (Base‘𝑅))
16153com23 1235 . . 3 ((𝑅 ∈ Ring ∧ 𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅)) → (𝑦(.r𝑅)𝑥) ∈ (Base‘𝑅))
1714, 16eqeltrd 2308 . 2 ((𝑅 ∈ Ring ∧ 𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅)) → (𝑥(.r𝑂)𝑦) ∈ (Base‘𝑅))
18 simpl 109 . . . 4 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → 𝑅 ∈ Ring)
19 simpr3 1031 . . . 4 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → 𝑧 ∈ (Base‘𝑅))
20 simpr2 1030 . . . 4 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → 𝑦 ∈ (Base‘𝑅))
21 simpr1 1029 . . . 4 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → 𝑥 ∈ (Base‘𝑅))
222, 12ringass 14028 . . . 4 ((𝑅 ∈ Ring ∧ (𝑧 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑥 ∈ (Base‘𝑅))) → ((𝑧(.r𝑅)𝑦)(.r𝑅)𝑥) = (𝑧(.r𝑅)(𝑦(.r𝑅)𝑥)))
2318, 19, 20, 21, 22syl13anc 1275 . . 3 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → ((𝑧(.r𝑅)𝑦)(.r𝑅)𝑥) = (𝑧(.r𝑅)(𝑦(.r𝑅)𝑥)))
242, 12, 1, 13opprmulg 14083 . . . . . 6 ((𝑅 ∈ Ring ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅)) → (𝑦(.r𝑂)𝑧) = (𝑧(.r𝑅)𝑦))
25243adant3r1 1238 . . . . 5 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → (𝑦(.r𝑂)𝑧) = (𝑧(.r𝑅)𝑦))
2625oveq2d 6033 . . . 4 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → (𝑥(.r𝑂)(𝑦(.r𝑂)𝑧)) = (𝑥(.r𝑂)(𝑧(.r𝑅)𝑦)))
272, 12ringcl 14025 . . . . . 6 ((𝑅 ∈ Ring ∧ 𝑧 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅)) → (𝑧(.r𝑅)𝑦) ∈ (Base‘𝑅))
2818, 19, 20, 27syl3anc 1273 . . . . 5 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → (𝑧(.r𝑅)𝑦) ∈ (Base‘𝑅))
292, 12, 1, 13opprmulg 14083 . . . . 5 ((𝑅 ∈ Ring ∧ 𝑥 ∈ (Base‘𝑅) ∧ (𝑧(.r𝑅)𝑦) ∈ (Base‘𝑅)) → (𝑥(.r𝑂)(𝑧(.r𝑅)𝑦)) = ((𝑧(.r𝑅)𝑦)(.r𝑅)𝑥))
3018, 21, 28, 29syl3anc 1273 . . . 4 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → (𝑥(.r𝑂)(𝑧(.r𝑅)𝑦)) = ((𝑧(.r𝑅)𝑦)(.r𝑅)𝑥))
3126, 30eqtrd 2264 . . 3 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → (𝑥(.r𝑂)(𝑦(.r𝑂)𝑧)) = ((𝑧(.r𝑅)𝑦)(.r𝑅)𝑥))
3214oveq1d 6032 . . . . 5 ((𝑅 ∈ Ring ∧ 𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅)) → ((𝑥(.r𝑂)𝑦)(.r𝑂)𝑧) = ((𝑦(.r𝑅)𝑥)(.r𝑂)𝑧))
33323adant3r3 1240 . . . 4 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → ((𝑥(.r𝑂)𝑦)(.r𝑂)𝑧) = ((𝑦(.r𝑅)𝑥)(.r𝑂)𝑧))
34163adant3r3 1240 . . . . 5 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → (𝑦(.r𝑅)𝑥) ∈ (Base‘𝑅))
352, 12, 1, 13opprmulg 14083 . . . . 5 ((𝑅 ∈ Ring ∧ (𝑦(.r𝑅)𝑥) ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅)) → ((𝑦(.r𝑅)𝑥)(.r𝑂)𝑧) = (𝑧(.r𝑅)(𝑦(.r𝑅)𝑥)))
3618, 34, 19, 35syl3anc 1273 . . . 4 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → ((𝑦(.r𝑅)𝑥)(.r𝑂)𝑧) = (𝑧(.r𝑅)(𝑦(.r𝑅)𝑥)))
3733, 36eqtrd 2264 . . 3 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → ((𝑥(.r𝑂)𝑦)(.r𝑂)𝑧) = (𝑧(.r𝑅)(𝑦(.r𝑅)𝑥)))
3823, 31, 373eqtr4rd 2275 . 2 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → ((𝑥(.r𝑂)𝑦)(.r𝑂)𝑧) = (𝑥(.r𝑂)(𝑦(.r𝑂)𝑧)))
392, 4, 12ringdir 14031 . . . 4 ((𝑅 ∈ Ring ∧ (𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅) ∧ 𝑥 ∈ (Base‘𝑅))) → ((𝑦(+g𝑅)𝑧)(.r𝑅)𝑥) = ((𝑦(.r𝑅)𝑥)(+g𝑅)(𝑧(.r𝑅)𝑥)))
4018, 20, 19, 21, 39syl13anc 1275 . . 3 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → ((𝑦(+g𝑅)𝑧)(.r𝑅)𝑥) = ((𝑦(.r𝑅)𝑥)(+g𝑅)(𝑧(.r𝑅)𝑥)))
412, 4ringacl 14042 . . . . 5 ((𝑅 ∈ Ring ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅)) → (𝑦(+g𝑅)𝑧) ∈ (Base‘𝑅))
42413adant3r1 1238 . . . 4 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → (𝑦(+g𝑅)𝑧) ∈ (Base‘𝑅))
432, 12, 1, 13opprmulg 14083 . . . 4 ((𝑅 ∈ Ring ∧ 𝑥 ∈ (Base‘𝑅) ∧ (𝑦(+g𝑅)𝑧) ∈ (Base‘𝑅)) → (𝑥(.r𝑂)(𝑦(+g𝑅)𝑧)) = ((𝑦(+g𝑅)𝑧)(.r𝑅)𝑥))
4418, 21, 42, 43syl3anc 1273 . . 3 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → (𝑥(.r𝑂)(𝑦(+g𝑅)𝑧)) = ((𝑦(+g𝑅)𝑧)(.r𝑅)𝑥))
45143adant3r3 1240 . . . 4 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → (𝑥(.r𝑂)𝑦) = (𝑦(.r𝑅)𝑥))
462, 12, 1, 13opprmulg 14083 . . . . 5 ((𝑅 ∈ Ring ∧ 𝑥 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅)) → (𝑥(.r𝑂)𝑧) = (𝑧(.r𝑅)𝑥))
47463adant3r2 1239 . . . 4 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → (𝑥(.r𝑂)𝑧) = (𝑧(.r𝑅)𝑥))
4845, 47oveq12d 6035 . . 3 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → ((𝑥(.r𝑂)𝑦)(+g𝑅)(𝑥(.r𝑂)𝑧)) = ((𝑦(.r𝑅)𝑥)(+g𝑅)(𝑧(.r𝑅)𝑥)))
4940, 44, 483eqtr4d 2274 . 2 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → (𝑥(.r𝑂)(𝑦(+g𝑅)𝑧)) = ((𝑥(.r𝑂)𝑦)(+g𝑅)(𝑥(.r𝑂)𝑧)))
502, 4, 12ringdi 14030 . . . 4 ((𝑅 ∈ Ring ∧ (𝑧 ∈ (Base‘𝑅) ∧ 𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅))) → (𝑧(.r𝑅)(𝑥(+g𝑅)𝑦)) = ((𝑧(.r𝑅)𝑥)(+g𝑅)(𝑧(.r𝑅)𝑦)))
5118, 19, 21, 20, 50syl13anc 1275 . . 3 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → (𝑧(.r𝑅)(𝑥(+g𝑅)𝑦)) = ((𝑧(.r𝑅)𝑥)(+g𝑅)(𝑧(.r𝑅)𝑦)))
522, 4ringacl 14042 . . . . 5 ((𝑅 ∈ Ring ∧ 𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅)) → (𝑥(+g𝑅)𝑦) ∈ (Base‘𝑅))
53523adant3r3 1240 . . . 4 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → (𝑥(+g𝑅)𝑦) ∈ (Base‘𝑅))
542, 12, 1, 13opprmulg 14083 . . . 4 ((𝑅 ∈ Ring ∧ (𝑥(+g𝑅)𝑦) ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅)) → ((𝑥(+g𝑅)𝑦)(.r𝑂)𝑧) = (𝑧(.r𝑅)(𝑥(+g𝑅)𝑦)))
5518, 53, 19, 54syl3anc 1273 . . 3 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → ((𝑥(+g𝑅)𝑦)(.r𝑂)𝑧) = (𝑧(.r𝑅)(𝑥(+g𝑅)𝑦)))
5647, 25oveq12d 6035 . . 3 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → ((𝑥(.r𝑂)𝑧)(+g𝑅)(𝑦(.r𝑂)𝑧)) = ((𝑧(.r𝑅)𝑥)(+g𝑅)(𝑧(.r𝑅)𝑦)))
5751, 55, 563eqtr4d 2274 . 2 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → ((𝑥(+g𝑅)𝑦)(.r𝑂)𝑧) = ((𝑥(.r𝑂)𝑧)(+g𝑅)(𝑦(.r𝑂)𝑧)))
58 eqid 2231 . . 3 (1r𝑅) = (1r𝑅)
592, 58ringidcl 14032 . 2 (𝑅 ∈ Ring → (1r𝑅) ∈ (Base‘𝑅))
60 simpl 109 . . . 4 ((𝑅 ∈ Ring ∧ 𝑥 ∈ (Base‘𝑅)) → 𝑅 ∈ Ring)
6160, 59syl 14 . . . 4 ((𝑅 ∈ Ring ∧ 𝑥 ∈ (Base‘𝑅)) → (1r𝑅) ∈ (Base‘𝑅))
62 simpr 110 . . . 4 ((𝑅 ∈ Ring ∧ 𝑥 ∈ (Base‘𝑅)) → 𝑥 ∈ (Base‘𝑅))
632, 12, 1, 13opprmulg 14083 . . . 4 ((𝑅 ∈ Ring ∧ (1r𝑅) ∈ (Base‘𝑅) ∧ 𝑥 ∈ (Base‘𝑅)) → ((1r𝑅)(.r𝑂)𝑥) = (𝑥(.r𝑅)(1r𝑅)))
6460, 61, 62, 63syl3anc 1273 . . 3 ((𝑅 ∈ Ring ∧ 𝑥 ∈ (Base‘𝑅)) → ((1r𝑅)(.r𝑂)𝑥) = (𝑥(.r𝑅)(1r𝑅)))
652, 12, 58ringridm 14036 . . 3 ((𝑅 ∈ Ring ∧ 𝑥 ∈ (Base‘𝑅)) → (𝑥(.r𝑅)(1r𝑅)) = 𝑥)
6664, 65eqtrd 2264 . 2 ((𝑅 ∈ Ring ∧ 𝑥 ∈ (Base‘𝑅)) → ((1r𝑅)(.r𝑂)𝑥) = 𝑥)
672, 12, 1, 13opprmulg 14083 . . . 4 ((𝑅 ∈ Ring ∧ 𝑥 ∈ (Base‘𝑅) ∧ (1r𝑅) ∈ (Base‘𝑅)) → (𝑥(.r𝑂)(1r𝑅)) = ((1r𝑅)(.r𝑅)𝑥))
6860, 62, 61, 67syl3anc 1273 . . 3 ((𝑅 ∈ Ring ∧ 𝑥 ∈ (Base‘𝑅)) → (𝑥(.r𝑂)(1r𝑅)) = ((1r𝑅)(.r𝑅)𝑥))
692, 12, 58ringlidm 14035 . . 3 ((𝑅 ∈ Ring ∧ 𝑥 ∈ (Base‘𝑅)) → ((1r𝑅)(.r𝑅)𝑥) = 𝑥)
7068, 69eqtrd 2264 . 2 ((𝑅 ∈ Ring ∧ 𝑥 ∈ (Base‘𝑅)) → (𝑥(.r𝑂)(1r𝑅)) = 𝑥)
713, 5, 6, 11, 17, 38, 49, 57, 59, 66, 70isringd 14053 1 (𝑅 ∈ Ring → 𝑂 ∈ Ring)
Colors of variables: wff set class
Syntax hints:  wi 4  wa 104  w3a 1004   = wceq 1397  wcel 2202  cfv 5326  (class class class)co 6017  Basecbs 13081  +gcplusg 13159  .rcmulr 13160  Grpcgrp 13582  1rcur 13971  Ringcrg 14008  opprcoppr 14079
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 619  ax-in2 620  ax-io 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2204  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-nul 4215  ax-pow 4264  ax-pr 4299  ax-un 4530  ax-setind 4635  ax-cnex 8122  ax-resscn 8123  ax-1cn 8124  ax-1re 8125  ax-icn 8126  ax-addcl 8127  ax-addrcl 8128  ax-mulcl 8129  ax-addcom 8131  ax-addass 8133  ax-i2m1 8136  ax-0lt1 8137  ax-0id 8139  ax-rnegex 8140  ax-pre-ltirr 8143  ax-pre-lttrn 8145  ax-pre-ltadd 8147
This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-fal 1403  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ne 2403  df-nel 2498  df-ral 2515  df-rex 2516  df-reu 2517  df-rmo 2518  df-rab 2519  df-v 2804  df-sbc 3032  df-csb 3128  df-dif 3202  df-un 3204  df-in 3206  df-ss 3213  df-nul 3495  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-int 3929  df-br 4089  df-opab 4151  df-mpt 4152  df-id 4390  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-rn 4736  df-res 4737  df-ima 4738  df-iota 5286  df-fun 5328  df-fn 5329  df-fv 5334  df-riota 5970  df-ov 6020  df-oprab 6021  df-mpo 6022  df-tpos 6410  df-pnf 8215  df-mnf 8216  df-ltxr 8218  df-inn 9143  df-2 9201  df-3 9202  df-ndx 13084  df-slot 13085  df-base 13087  df-sets 13088  df-plusg 13172  df-mulr 13173  df-0g 13340  df-mgm 13438  df-sgrp 13484  df-mnd 13499  df-grp 13585  df-mgp 13933  df-ur 13972  df-ring 14010  df-oppr 14080
This theorem is referenced by:  opprringbg  14092  mulgass3  14097  1unit  14120  opprunitd  14123  crngunit  14124  unitmulcl  14126  unitgrp  14129  unitnegcl  14143  unitpropdg  14161  subrguss  14249  subrgunit  14252  isridl  14517  ridl0  14523  ridl1  14524
  Copyright terms: Public domain W3C validator