35 citations · 72 across the 13 of their papers we have counts for
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math.SP2017
Eigenvalues of compactly perturbed operators via entropy numbers
Marcel Hansmann
We derive new estimates for the number of discrete eigenvalues of compactly perturbed operators on Banach spaces, assuming that the perturbing operator is an element of a weak entr…
math.SP2017
Some remarks on upper bounds for Weierstrass primary factors and their application in spectral theory
Marcel Hansmann
We study upper bounds on Weierstrass primary factors and discuss their application in spectral theory. One of the main aims of this note is to draw attention to works of Blumenthal…