Prefer a chat interface with context about you and your work?
Spectral properties of tensor products of linear operators. II. The approximate point spectrum and Kato essential spectrum
For tensor products of linear operators, their approximate point spectrum, approximate deficiency spectrum and essential spectra in the sense of T. Kato and Gustafson-Weidmann are determined together with explicit formulae for their nullity and deficiency.The theory applies to A®I+I®B and A® B. Introduction.Given densely defined closed linear operators A and …