Joint spectra of strongly hyponormal operators on Banach spaces
Joint spectra of strongly hyponormal operators on Banach spaces
The joint spectrum for a commuting n-tuple in functional analysis has its origin in functional calculus which appeared in J. L. Taylor's paper [23] in 1970.In the case of operators on Hilbert spaces, in [25] F.-H. Vasilescu characterized the joint spectrum for a commuting pair and in [11] R. Curto …