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A commutativity theorem for rings

Published online by Cambridge University Press:  17 April 2009

Hiroaki Komatsu
Affiliation:
Department of Mathematics, Okayama University Okayama 700, Japan
Tsunekazu Nishinaka
Affiliation:
Department of Mathematics, Okayama University Okayama 700, Japan
Hisao Tominaga
Affiliation:
Department of Mathematics, Okayama University Okayama 700, Japan
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Abstract

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We prove the following theorem: Let R be a ring, l a positive integer, and n a non-negative integer. If for each x, yR, either xy = yx or xy = xn f(y)x1 for some f(X) ∈ X2Z[X], then R is commutative.

Type
Research Article
Copyright
Copyright © Australian Mathematical Society 1991

References

[1]Bell, H.E., ‘Commutativity results for semigroups in rings’, Proc. Internal. Sympos. Semigroup Theory, Kyoto (1990), 3139.Google Scholar
[2]Komatsu, H. and Tominaga, H., ‘Chacron's condition and commutativity theorems’, Math. J. Okayama Univ. 31 (1989), 101120.Google Scholar
[3]Komatsu, H. and Tominaga, H., ‘Some commutativity conditions for rings with unity’, Resultate Math. 10 (1991), 8388.CrossRefGoogle Scholar