Perturbations and sums of operators
Tuomas Hytönen (Viikki Biocenter 1)
JMAM Van Neerven (TU Delft - Analysis)
MC Veraar (TU Delft - Analysis)
L Weis (Karlsruhe Institut für Technologie)
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Abstract
In this chapter we address a couple of topics in the theory of H∞-calculus centering around the question what can be said about an operator of the form A+B when A and B have certain “good” properties such as being (R-)sectorial or admitting a bounded H∞-calculus.