Hostname: page-component-cd9895bd7-q99xh Total loading time: 0 Render date: 2024-12-26T01:06:38.306Z Has data issue: false hasContentIssue false

Nilpotency indices of the radicals of p-group algebras

Published online by Cambridge University Press:  20 January 2009

Yasushi Ninomiya
Affiliation:
Department of Mathematics, Faculty of Liberal Arts, Shinshu University, Matsumoto 390, Japan
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 k be a field of characteristic p>0. We classify all finite p-groups G satisfying the inequality p−2|G|≦t(G) < p−1|G|, where t(G) is the nilpotency index of the Jacobson radical of k[G].

Type
Research Article
Copyright
Copyright © Edinburgh Mathematical Society 1994

References

REFERENCES

1.Burnside, W., Theory of Groups of Finite Order, 2nd edition (Cambridge Univ. Press, Cambridge, 1911).Google Scholar
2.Hall, M. and Senior, J. K., The Groups of Order 2n (n≦6) (Macmillan, New York, 1964).Google Scholar
3.James, R., The groups of order p 6 (p an odd prime), Math. Comp. 34 (1980), 613637.Google Scholar
4.Jennings, S. A., The structure of the group ring of a p-group over a modular field, Trans. Amer. Math. Soc. 50 (1941), 175185.Google Scholar
5.Karpilovsky, G., The Jacobson Radical of Group Algebras (North-Holland, Amsterdam, 1987).Google Scholar
6.Koshitani, S., On the nilpotency indices of the radicals of group algebras of p-groups which have cyclic subgroups of index p, Tsukuba J. Math. 1 (1977), 137148.CrossRefGoogle Scholar
7.Motose, K., On a theorem of S. Koshitani, Math. J. Okayama Univ. 20 (1978), 5965.Google Scholar
8.Motose, K. and Ninomiya, Y., On the nilpotency index of the radical of a group algebra, Hokkaido Math. J. 4 (1975), 261264.CrossRefGoogle Scholar
9.Ninomiya, Y., Finite p-groups with cyclic subgroups of index p 2, Math. J. Okayama Univ., to appear.Google Scholar
10.Shalev, A., Dimension subgroups, nilpotency indices, and the number of generators of ideals in p-group algebras, J. Algebra 129 (1990), 412438.CrossRefGoogle Scholar
11.Wallace, D. A. R., Lower bounds for the radical of the group algebra of a finite p-soluble group, Proc. Edinburgh Math. Soc. 16 (1968/1969), 127134.CrossRefGoogle Scholar