RIESZ IDEMPOTENT OF (n, k)-QUASI-*-PARANORMAL OPERATORS

• 作 者: Qingping ZENG Huaijie ZHONG
• 机 构: CollegeofComputerandInformationSciences,SchoolofMathematicsandComputerScience
• 出 处: 数学物理学报：B辑英文版
• 发表日期: 2016年5期
• 基金项目: This work has been supported by National Natural Science Foundation of China，Natural Science Foundation of Fujian Province

A bounded linear operator T on a complex Hilbert space H is called(n, k)-quasi-*-paranormal if ║T~(1+n)(T~kx) ║~(1/(1+n))║ T~kx║~(n/(1+n))≥║ T*(T~kx)║ for all x ∈ H,where n, k are nonnegative integers. This class of operators has many interesting properti