Spectra of the spherical Aluthge transform, the linear pencil, and a commuting pair of operators.

In this paper, we review and investigate some properties of a linear pencil in the frame of the point spectrum and an isolated point in its spectrum. We next give relationships among the spectrum of the linear pencil, the Taylor spectrums of a commuting pair and its spherical Aluthge transform through projection maps and the spectral mapping theorem. [ABSTRACT FROM AUTHOR]