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Equivalence bimodule between non-commutative tori

Sei-Qwon OhChun-Gil Park — 2003

Czechoslovak Mathematical Journal

The non-commutative torus C * ( n , ω ) is realized as the C * -algebra of sections of a locally trivial C * -algebra bundle over S ω ^ with fibres isomorphic to C * ( n / S ω , ω 1 ) for a totally skew multiplier ω 1 on n / S ω . D. Poguntke [9] proved that A ω is stably isomorphic to C ( S ω ^ ) C * ( n / S ω , ω 1 ) C ( S ω ^ ) A ϕ M k l ( ) for a simple non-commutative torus A ϕ and an integer k l . It is well-known that a stable isomorphism of two separable C * -algebras is equivalent to the existence of equivalence bimodule between them. We construct an A ω - C ( S ω ^ ) A ϕ -equivalence bimodule.

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