Hostname: page-component-cd9895bd7-mkpzs Total loading time: 0 Render date: 2024-12-25T08:48:25.844Z Has data issue: false hasContentIssue false

Minimal ideals in near-rings and localized distributivity conditions

Published online by Cambridge University Press:  09 April 2009

Gary Birkenmeier
Affiliation:
University of Southwestern Louisiana Lafayette, Louisiana 70504, U.S.A.
Henry Heatherly
Affiliation:
University of Southwestern Louisiana Lafayette, Louisiana 70504, U.S.A.
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Let B, S, and T be subsets of a (left) near-ring R with B and T nonempty. We say B is (S, T)-distributive if s(b1+b2)t = sb1t + sb2t, for each sS, b1, 2B, tT. Basic properties for this type of ‘localized distributivity’ condition are developed, examples are given, and applications are made in determining the structure of minimal ideals. Theorem. If I is a minimal ideal of R and Ik is (Im, In)-distributive for some k, n ≧ 1, m ≧ 0, then either I2 = 0 or I is a simple, nonnilpotent ring with every element of I distributive in R. Theorem. Let Rk be (Rm, Rn)-distributive, for some k, n ≧ 1, m ≧ 0; if R is semiprime or is a subdirect product of simple near-rings, then R is a ring. Connections are established with near-rings which satisfy a permutation identity and with weakly distributive near-rings. If RA → 0 is an exact sequence of near-rings, then conditions on A are given which will impose conditions on the minimal ideals of R.

Type
Research Article
Copyright
Copyright © Australian Mathematical Society 1993

References

[1]Andrunakievic, V., ‘Radicals in associative rings I’, Mat. Sb. 44 (1958), 179212.Google Scholar
[2]Birkenmeier, G. and Heatherly, H., ‘Polynomial identity properties for near-rings on certain groups’, Near-Rings Newsletter 12 (1989), 515.Google Scholar
[3]Birkenmeier, G. and Heatherly, H., ‘Medical near-rings’, Monatsh. Math. 107 (1989), 89110.CrossRefGoogle Scholar
[4]Birkenmeier, G. and Heatherly, H., ‘Medial and distributively generated near-rings’, Monatsh. Math. 109 (1990), 97101.Google Scholar
[5]Birkenmeier, G. and Heatherly, H., ‘Medial rings and an associated radical’, Czechoslovak Math. J. 40 (1990), 258283.CrossRefGoogle Scholar
[6]Birkenmeier, G. and Heatherly, H., ‘Permutation identity rings and the medial radical’, in: Proc. Conference on Non-Commutative Ring Theory (Athens, Ohio), Lecture Notes in Math. 1448 (Springer, Berlin, 1990), pp. 125138.CrossRefGoogle Scholar
[7]Birkenmeier, G. and Heatherly, H., ‘Minimal ideals in near-rings’, Comm. Algebra 20 (1992), 457468.CrossRefGoogle Scholar
[8]Brown, H., ‘Near algebras’, Illinois J. Math. 12 (1968), 215227.CrossRefGoogle Scholar
[9]Brown, H., ‘Distributor theory in near-rings’, Comm. Pure Math. 21 (1968), 535544.Google Scholar
[10]Clay, J. R., ‘Near-rings on groups of low order’, Math. Z. 104 (1968), 364371.CrossRefGoogle Scholar
[11]Divinsky, N., Rings and Radicals (Univ. of Toronto Press, Ontario, 1965).Google Scholar
[12]Fröhlich, A., ‘Distributively generated near-rings (I. Ideal theory)’, Proc. London Math. Soc. 8 (1958), 7694.CrossRefGoogle Scholar
[13]Heatherly, H. and Ligh, S., ‘Pseudo-distributive near-rings’, Bull. Austral. Math. Soc. 12 (1975), 449456.CrossRefGoogle Scholar
[14]Kaarli, K., ‘Minimal ideals in near-rings’, Tartu Riikl. Ül. Toimetised, 336 (1975), 105142 (in Russian).Google Scholar
[15]Kaarli, K., ‘On Jacobson type radicals of near-rings’, Acta Math. Hung. 50 (1987), 7178.CrossRefGoogle Scholar
[16]Kaarli, K., ‘On minimal ideals of distributively generated near-rings’, preprint.Google Scholar
[17]Meldrum, J. D. P., Near-rings and their links with groups (Pitman, Marshfield, MA, 1985).Google Scholar
[18]Putcha, M. and Yaqub, A., ‘Semigroups satisfying permutation identities’, Semigroup Forum 3 (1971), 6873.Google Scholar
[19]Scott, S. D., ‘Minimal ideals in near-rings with minimal condition’, J. London Math. Soc. (2) 8 (1974), 812.Google Scholar
[20]Wiegandt, R., ‘On subdirectly irreducible near-rings which are fields’, in: Near-Rings and Near-Fields (ed. Betsch, G.) (Amsterdam, North-Holland, 1987) pp. 295298.Google Scholar