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Generalized non-commutative tori

Chun-Gil Park (2002)

Studia Mathematica

The generalized non-commutative torus T ϱ k of rank n is defined by the crossed product A m / k × α × α . . . × α , where the actions α i of ℤ on the fibre M k ( ) of a rational rotation algebra A m / k are trivial, and C * ( k × k ) × α × α . . . × α is a non-commutative torus A ϱ . It is shown that T ϱ k is strongly Morita equivalent to A ϱ , and that T ϱ k M p is isomorphic to A ϱ M k ( ) M p if and only if the set of prime factors of k is a subset of the set of prime factors of p.

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