Mathematics – Quantum Algebra
Scientific paper
2003-11-28
Mathematics
Quantum Algebra
24pages
Scientific paper
The relations between the radical of crossed product $R #_\sigma H$ and
algebra $R$ are obtained. Using this theory, the author shows that if $H$ is a
finite-dimensional semisimple, cosemisimle, and either commutative or
cocommutative Hopf algebra, then $R$ is $H$-semiprime iff $R$ is semiprime iff
$R#_{\sigma}H$ is semiprime.
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