摘要
Let （A, Z, α） be a C<sup>*</sup>-dynamical system, and α<sup>n</sup>=id （n is a fixed positive integer）. A natural problem is how the C<sup>*</sup>-crossed product A ×<sub>α</sub>Z relates to A×<sub>α</sub>Z<sub>n</sub>. The answer is the following: A×<sub>α</sub>Z≌M<sub>A×<sub>α</sub>Z<sub>n</sub></sub>,where M<sub>A×<sub>α</sub>Z<sub>n</sub></sub> is the mapping torus of , and （A×<sub>α</sub>Z<sub>n</sub>, <sub>n</sub>, ）is the dual system
基金
Project partially supported by the National Natural Science Foundation of China.
