Hostname: page-component-77c89778f8-5wvtr Total loading time: 0 Render date: 2024-07-17T01:51:58.370Z Has data issue: false hasContentIssue false

Closure operations and group algebras

Published online by Cambridge University Press:  20 January 2009

J. D. P. Meldrum
Affiliation:
University of Edinburgh
D. A. R. Wallace
Affiliation:
University of Aberdeen
Rights & Permissions [Opens in a new window]

Extract

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 G be a group and let K be a field. The twisted group algebra Kt(G) of G over K is defined as follows: let G have elements a, b, c, … and let Kt(G) be the vector space over K with basis elements ; let α: G ×GK be a 2-cocycle and define a multiplication on Kt(G) by

extending this by linearity to Kt(G) yields an associative algebra. We are interested in information concerning the Jacobson radical of Kt(G), denoted by JKt(G).

Type
Research Article
Copyright
Copyright © Edinburgh Mathematical Society 1972

References

REFERENCES

(1) Bovdi, A. A., Group rings of torsion-free groups, Sibirsk. Math. Z. 1 (1960), 251253.Google Scholar
(2) Connell, I. G., On the group ring, Canad. J. Math. 15 (1963), 650685.CrossRefGoogle Scholar
(3) Green, J. A. and Stonehewer, S. E., The radicals of some group algebras, J. Algebra 13 (1969), 137142.CrossRefGoogle Scholar
(4) Green, J. A. and Stonehewer, S. E., Note on the paper “The radicals of some group algebras”, J. Algebra 13 (1969), 297.CrossRefGoogle Scholar
(5) Hall, P., On non-strictly simple groups, Proc. Cambridge Philos. Soc. 59 (1963), 531553.CrossRefGoogle Scholar
(6) Kurosh, A. G., Theory of Groups, vol. II (New York, 1956).Google Scholar
(7) Passman, D. S., Nil ideals in group rings, Michigan Math. J. 9 (1962), 375384.CrossRefGoogle Scholar
(8) Passman, D. S., Radicals of twisted group rings, Proc. London Math. Soc. (3) 20 (1970), 409437.CrossRefGoogle Scholar
(9) Passman, D. S., On the semisimplicity of twisted group algebras, Proc. Amer. Math. Soc. 25 (1970), 161166.CrossRefGoogle Scholar
(10) Stonehewer, S. E., Group algebras of some torsion-free groups, J. Algebra 13 (1969), 143147.CrossRefGoogle Scholar
(11) Villamayor, O. E., On the semisimplicity of group algebras, Proc. Amer. Math. Soc. 9 (1958), 621627.CrossRefGoogle Scholar
(12) Villamayor, O. E., On the semisimplicity of group algebras II, Proc. Amer. Math. Soc. 10 (1959), 2731.Google Scholar
(13) Wallace, D. A. R., The Jacobson radicals of the group algebras of a group and of certain normal subgroups, Math. Z. 100 (1967), 282294.CrossRefGoogle Scholar
(14) Wallace, D. A. R., Some applications of subnormality in groups in the study of group algebras, Math. Z. 108 (1968), 5362.CrossRefGoogle Scholar
(15) Wallace, D. A. R., The radical of the group algebra of a subgroup, of a polycyclic group and of a restricted SN-group, Proc. Edinburgh Math. Soc. 17 (1970), 165171.CrossRefGoogle Scholar