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Topologically free actions and ideals in discrete <i>C</i>*-dynamical systems

Topologically free actions and ideals in discrete <i>C</i>*-dynamical systems

A C *-dynamical system is called topologically free if the action satisfies a certain natural condition weaker than freeness. It is shown that if a discrete system is topologically free then the ideal structure of the crossed product algebra is related to that of the original algebra. One consequence is …