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On the Dimension of Modules and Algebras, VI. Comparison of Global and Algebra Dimension

Published online by Cambridge University Press:  22 January 2016

Maurice Auslander*
Affiliation:
University of Michigan
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Throughout this paper all rings are assumed to have unit elements. A ring Λ is said to be semi-primary if its Jacobson radical N is nilpotent and Г = Λ/N satisfies the minimum condition. The main objective of this paper is

THEOREM I. Let A be a semi-primary algebra over a field K. Let N be the radical of Λ and Г = Λ/N. If

Then

dim Λ = gl.dim Λ.

Type
Research Article
Copyright
Copyright © Editorial Board of Nagoya Mathematical Journal 1957

References

[1] Auslander, M., On the dimension of modules and algebras (III), global dimension, Nagoya Math. J., 9 (1955),6777.CrossRefGoogle Scholar
[2] Cartan, H. and Eilenberg, S., Homological Algebra, Princeton University Press, 1956.Google Scholar
[3] Eilenberg, S., Algebras of cohomologically finite dimension, Comment. Math. Helv., 28 (1954),310319.CrossRefGoogle Scholar
[4] Ikeda, M., Nagao, H. and Nakayama, T., Algebras with vanishing w-cohomology groups, Nagoya Math. J. 7 (1954),115131.CrossRefGoogle Scholar
[5] Nakayama, T. and Azumaya, G., On irreducible rings, Ann. of Math. 48 (1947),949965.CrossRefGoogle Scholar