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math.NA2005
The spectral approximation of multiplication operators via asymptotic (structured) linear algebra
Stefano Serra Capizzano
multiplication operator on a Hilbert space may be approximated with finite sections by choosing an orthonormal basis of the Hilbert space. Nonzero multiplication operators on …
math.SP2005
The asymptotic properties of the spectrum of non symmetrically perturbed Jacobi matrix sequences
Leonid Golinskii, Stefano Serra-Capizzano
Under the mild trace-norm assumptions we show that the eigenvalues of a generic (non Hermitian) complex perturbation of a Jacobi matrix sequence (not necessarily real) are still di…