The Filling Holes Problems of Operator Spectra of 2~*2 Upper Triangular Operator Matrices
Huaijie Zhong · Journal of Fujian Normal University · 2007
Let Mc=AC0B∈B(XY) be an upper triangular operator acting on the Banach space B(XY).It studies on the filling holes problems of various special operator spectra of Mc including five cases such as left spectra,right spectra,left essential spectra,right essential speatra and essential spectra.