J. Aust. Math. Soc.
73 (2002), 357-376
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Characteristic invariant of tensor product actions and actions on crossed products
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Yukako Miwa
Division of Mathematical Sciences
Osaka-Kyoiku University
Kashiwara
Osaka 582
Japan
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Abstract
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The first purpose of this paper is to give a
tensor product formula of the characteristic
invariant and modular invariant for a tensor
product action of a discrete group G
on AFD factors. The second purpose is to
describe a characteristic invariant and modular
invariant of the extended action to a crossed
product in terms of the original invariants.
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