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math.FA2019★ 1 cited
The structures and decompositions of symmetries involving idempotents
Yuan Li, Jiaxin Zhang, Nana Wei
Let be a separable Hilbert space and be an idempotent on We denote by and $…
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…