The problem of calculating the eigensystem of a general complex matrix is well known. In many cases, however, the eigensystem is poorly determined numerically in the sense that small changes in the ...

Let F be a complex Banach space, B(F) the algebra of all bounded operators acting on F, E = E(ℂ, B(F)) the Fréchet space of all entire functions from the complex plane into B(F), endowed with the ...