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Theorem opprring 13956
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 2207 . . 3 (Base‘𝑅) = (Base‘𝑅)
31, 2opprbasg 13952 . 2 (𝑅 ∈ Ring → (Base‘𝑅) = (Base‘𝑂))
4 eqid 2207 . . 3 (+g𝑅) = (+g𝑅)
51, 4oppraddg 13953 . 2 (𝑅 ∈ Ring → (+g𝑅) = (+g𝑂))
6 eqidd 2208 . 2 (𝑅 ∈ Ring → (.r𝑂) = (.r𝑂))
7 ringgrp 13878 . . 3 (𝑅 ∈ Ring → 𝑅 ∈ Grp)
8 eqidd 2208 . . . 4 (𝑅 ∈ Ring → (Base‘𝑅) = (Base‘𝑅))
95oveqdr 5995 . . . 4 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅))) → (𝑥(+g𝑅)𝑦) = (𝑥(+g𝑂)𝑦))
108, 3, 9grppropd 13464 . . 3 (𝑅 ∈ Ring → (𝑅 ∈ Grp ↔ 𝑂 ∈ Grp))
117, 10mpbid 147 . 2 (𝑅 ∈ Ring → 𝑂 ∈ Grp)
12 eqid 2207 . . . 4 (.r𝑅) = (.r𝑅)
13 eqid 2207 . . . 4 (.r𝑂) = (.r𝑂)
142, 12, 1, 13opprmulg 13948 . . 3 ((𝑅 ∈ Ring ∧ 𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅)) → (𝑥(.r𝑂)𝑦) = (𝑦(.r𝑅)𝑥))
152, 12ringcl 13890 . . . 4 ((𝑅 ∈ Ring ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑥 ∈ (Base‘𝑅)) → (𝑦(.r𝑅)𝑥) ∈ (Base‘𝑅))
16153com23 1212 . . 3 ((𝑅 ∈ Ring ∧ 𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅)) → (𝑦(.r𝑅)𝑥) ∈ (Base‘𝑅))
1714, 16eqeltrd 2284 . 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 1008 . . . 4 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → 𝑧 ∈ (Base‘𝑅))
20 simpr2 1007 . . . 4 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → 𝑦 ∈ (Base‘𝑅))
21 simpr1 1006 . . . 4 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → 𝑥 ∈ (Base‘𝑅))
222, 12ringass 13893 . . . 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 1252 . . 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 13948 . . . . . 6 ((𝑅 ∈ Ring ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅)) → (𝑦(.r𝑂)𝑧) = (𝑧(.r𝑅)𝑦))
25243adant3r1 1215 . . . . 5 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → (𝑦(.r𝑂)𝑧) = (𝑧(.r𝑅)𝑦))
2625oveq2d 5983 . . . 4 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → (𝑥(.r𝑂)(𝑦(.r𝑂)𝑧)) = (𝑥(.r𝑂)(𝑧(.r𝑅)𝑦)))
272, 12ringcl 13890 . . . . . 6 ((𝑅 ∈ Ring ∧ 𝑧 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅)) → (𝑧(.r𝑅)𝑦) ∈ (Base‘𝑅))
2818, 19, 20, 27syl3anc 1250 . . . . 5 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → (𝑧(.r𝑅)𝑦) ∈ (Base‘𝑅))
292, 12, 1, 13opprmulg 13948 . . . . 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 1250 . . . 4 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → (𝑥(.r𝑂)(𝑧(.r𝑅)𝑦)) = ((𝑧(.r𝑅)𝑦)(.r𝑅)𝑥))
3126, 30eqtrd 2240 . . 3 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → (𝑥(.r𝑂)(𝑦(.r𝑂)𝑧)) = ((𝑧(.r𝑅)𝑦)(.r𝑅)𝑥))
3214oveq1d 5982 . . . . 5 ((𝑅 ∈ Ring ∧ 𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅)) → ((𝑥(.r𝑂)𝑦)(.r𝑂)𝑧) = ((𝑦(.r𝑅)𝑥)(.r𝑂)𝑧))
33323adant3r3 1217 . . . 4 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → ((𝑥(.r𝑂)𝑦)(.r𝑂)𝑧) = ((𝑦(.r𝑅)𝑥)(.r𝑂)𝑧))
34163adant3r3 1217 . . . . 5 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → (𝑦(.r𝑅)𝑥) ∈ (Base‘𝑅))
352, 12, 1, 13opprmulg 13948 . . . . 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 1250 . . . 4 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → ((𝑦(.r𝑅)𝑥)(.r𝑂)𝑧) = (𝑧(.r𝑅)(𝑦(.r𝑅)𝑥)))
3733, 36eqtrd 2240 . . 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 2251 . 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 13896 . . . 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 1252 . . 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 13907 . . . . 5 ((𝑅 ∈ Ring ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅)) → (𝑦(+g𝑅)𝑧) ∈ (Base‘𝑅))
42413adant3r1 1215 . . . 4 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → (𝑦(+g𝑅)𝑧) ∈ (Base‘𝑅))
432, 12, 1, 13opprmulg 13948 . . . 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 1250 . . 3 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → (𝑥(.r𝑂)(𝑦(+g𝑅)𝑧)) = ((𝑦(+g𝑅)𝑧)(.r𝑅)𝑥))
45143adant3r3 1217 . . . 4 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → (𝑥(.r𝑂)𝑦) = (𝑦(.r𝑅)𝑥))
462, 12, 1, 13opprmulg 13948 . . . . 5 ((𝑅 ∈ Ring ∧ 𝑥 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅)) → (𝑥(.r𝑂)𝑧) = (𝑧(.r𝑅)𝑥))
47463adant3r2 1216 . . . 4 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → (𝑥(.r𝑂)𝑧) = (𝑧(.r𝑅)𝑥))
4845, 47oveq12d 5985 . . 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 2250 . 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 13895 . . . 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 1252 . . 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 13907 . . . . 5 ((𝑅 ∈ Ring ∧ 𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅)) → (𝑥(+g𝑅)𝑦) ∈ (Base‘𝑅))
53523adant3r3 1217 . . . 4 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → (𝑥(+g𝑅)𝑦) ∈ (Base‘𝑅))
542, 12, 1, 13opprmulg 13948 . . . 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 1250 . . 3 ((𝑅 ∈ Ring ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑅) ∧ 𝑧 ∈ (Base‘𝑅))) → ((𝑥(+g𝑅)𝑦)(.r𝑂)𝑧) = (𝑧(.r𝑅)(𝑥(+g𝑅)𝑦)))
5647, 25oveq12d 5985 . . 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 2250 . 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 2207 . . 3 (1r𝑅) = (1r𝑅)
592, 58ringidcl 13897 . 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 13948 . . . 4 ((𝑅 ∈ Ring ∧ (1r𝑅) ∈ (Base‘𝑅) ∧ 𝑥 ∈ (Base‘𝑅)) → ((1r𝑅)(.r𝑂)𝑥) = (𝑥(.r𝑅)(1r𝑅)))
6460, 61, 62, 63syl3anc 1250 . . 3 ((𝑅 ∈ Ring ∧ 𝑥 ∈ (Base‘𝑅)) → ((1r𝑅)(.r𝑂)𝑥) = (𝑥(.r𝑅)(1r𝑅)))
652, 12, 58ringridm 13901 . . 3 ((𝑅 ∈ Ring ∧ 𝑥 ∈ (Base‘𝑅)) → (𝑥(.r𝑅)(1r𝑅)) = 𝑥)
6664, 65eqtrd 2240 . 2 ((𝑅 ∈ Ring ∧ 𝑥 ∈ (Base‘𝑅)) → ((1r𝑅)(.r𝑂)𝑥) = 𝑥)
672, 12, 1, 13opprmulg 13948 . . . 4 ((𝑅 ∈ Ring ∧ 𝑥 ∈ (Base‘𝑅) ∧ (1r𝑅) ∈ (Base‘𝑅)) → (𝑥(.r𝑂)(1r𝑅)) = ((1r𝑅)(.r𝑅)𝑥))
6860, 62, 61, 67syl3anc 1250 . . 3 ((𝑅 ∈ Ring ∧ 𝑥 ∈ (Base‘𝑅)) → (𝑥(.r𝑂)(1r𝑅)) = ((1r𝑅)(.r𝑅)𝑥))
692, 12, 58ringlidm 13900 . . 3 ((𝑅 ∈ Ring ∧ 𝑥 ∈ (Base‘𝑅)) → ((1r𝑅)(.r𝑅)𝑥) = 𝑥)
7068, 69eqtrd 2240 . 2 ((𝑅 ∈ Ring ∧ 𝑥 ∈ (Base‘𝑅)) → (𝑥(.r𝑂)(1r𝑅)) = 𝑥)
713, 5, 6, 11, 17, 38, 49, 57, 59, 66, 70isringd 13918 1 (𝑅 ∈ Ring → 𝑂 ∈ Ring)
Colors of variables: wff set class
Syntax hints:  wi 4  wa 104  w3a 981   = wceq 1373  wcel 2178  cfv 5290  (class class class)co 5967  Basecbs 12947  +gcplusg 13024  .rcmulr 13025  Grpcgrp 13447  1rcur 13836  Ringcrg 13873  opprcoppr 13944
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 615  ax-in2 616  ax-io 711  ax-5 1471  ax-7 1472  ax-gen 1473  ax-ie1 1517  ax-ie2 1518  ax-8 1528  ax-10 1529  ax-11 1530  ax-i12 1531  ax-bndl 1533  ax-4 1534  ax-17 1550  ax-i9 1554  ax-ial 1558  ax-i5r 1559  ax-13 2180  ax-14 2181  ax-ext 2189  ax-sep 4178  ax-nul 4186  ax-pow 4234  ax-pr 4269  ax-un 4498  ax-setind 4603  ax-cnex 8051  ax-resscn 8052  ax-1cn 8053  ax-1re 8054  ax-icn 8055  ax-addcl 8056  ax-addrcl 8057  ax-mulcl 8058  ax-addcom 8060  ax-addass 8062  ax-i2m1 8065  ax-0lt1 8066  ax-0id 8068  ax-rnegex 8069  ax-pre-ltirr 8072  ax-pre-lttrn 8074  ax-pre-ltadd 8076
This theorem depends on definitions:  df-bi 117  df-3an 983  df-tru 1376  df-fal 1379  df-nf 1485  df-sb 1787  df-eu 2058  df-mo 2059  df-clab 2194  df-cleq 2200  df-clel 2203  df-nfc 2339  df-ne 2379  df-nel 2474  df-ral 2491  df-rex 2492  df-reu 2493  df-rmo 2494  df-rab 2495  df-v 2778  df-sbc 3006  df-csb 3102  df-dif 3176  df-un 3178  df-in 3180  df-ss 3187  df-nul 3469  df-pw 3628  df-sn 3649  df-pr 3650  df-op 3652  df-uni 3865  df-int 3900  df-br 4060  df-opab 4122  df-mpt 4123  df-id 4358  df-xp 4699  df-rel 4700  df-cnv 4701  df-co 4702  df-dm 4703  df-rn 4704  df-res 4705  df-ima 4706  df-iota 5251  df-fun 5292  df-fn 5293  df-fv 5298  df-riota 5922  df-ov 5970  df-oprab 5971  df-mpo 5972  df-tpos 6354  df-pnf 8144  df-mnf 8145  df-ltxr 8147  df-inn 9072  df-2 9130  df-3 9131  df-ndx 12950  df-slot 12951  df-base 12953  df-sets 12954  df-plusg 13037  df-mulr 13038  df-0g 13205  df-mgm 13303  df-sgrp 13349  df-mnd 13364  df-grp 13450  df-mgp 13798  df-ur 13837  df-ring 13875  df-oppr 13945
This theorem is referenced by:  opprringbg  13957  mulgass3  13962  1unit  13984  opprunitd  13987  crngunit  13988  unitmulcl  13990  unitgrp  13993  unitnegcl  14007  unitpropdg  14025  subrguss  14113  subrgunit  14116  isridl  14381  ridl0  14387  ridl1  14388
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