Null Sets and Analytic Continuation.
Numerical Algorithms for the Nevanlinna-Pick Problem.
Numerical condition of polynomials in different forms.
Numerical conformal mappings of unbounded multiply-connected domains using the charge simulation method.
Numerical range of operators acting on Banach spaces
The aim of the paper is to propose a definition of numerical range of an operator on reflexive Banach spaces. Under this definition the numerical range will possess the basic properties of a canonical numerical range. We will determine necessary and sufficient conditions under which the numerical range of a composition operator on a weighted Hardy space is closed. We will also give some necessary conditions to show that when the closure of the numerical range of a composition operator on a small...
Numerische Ermittlung quasikonformer Abbildungen mit finiten Elementen.