2 papers
math.FA2018
The minimal and maximal symmetries for -contractive projections
Yuan Li, Xiaomei Cai, Jiajia Niu +1
In this paper, we firstly character the structures of symmetries such that a projection is -contractive. Then the minimal and maximal elements of the symmetries with…
math.FA2018
The absolute values and support projections for a class of operator matrices involving idempotents
Yuan Li, Xiaomei Cai, Shuaijie Wang
Let and be a linear bounded operator from a Hilbert space into another Hilbert space In this paper, we conside…