Date | 2019-04-24 |
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Speaker | Qingxiang Xu |

Dept. | Shanghai Normal University |

Room | 129-301 |

Time | 16:00-17:30 |

Halmos two projections theorem for Hilbert space operators is one of the fundamental results in operator theory. In this talk we will focus on its generalization to the Hilbert C*-module case, and its application in clarifying the Friedrichs angle between two closed submodules. Based on some new characterizations of the closed submodules and their associated projections, we will introduce a new term of separated idempotents. Some properties of the seperated idempotents will be presented.

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