Now showing items 11-20 of 23
Regularity properties of sectorial operators: extrapolation, counterexamples and generic classes
We study the interplay of different regularity properties of sectorial operators. The three main results deal with maximal regularity and the holomorphic functional calculus of sectorial operators. In the first main result ...
Consumption-investment problems of a relaxed investor with partial and insider information
In a financial market consisting of a risk-free asset and several risky assets, an investor with logarithmic or power utility functions aims to maximize the expected utility of terminal wealth and intermediate consumption. ...
Optimale Allokation für Voith-Schneider Propeller im Rahmen des dynamischen Positionierens
Allokation im Rahmen des dynamischen Positionierens für Voith-Schneider Propeller mit Hilfe optimaler Steuerung zur Verbesserung des Verhaltens des Schiffes im dynamischen Positionierbetrieb.
Non-autonomous Cauchy problems governed by forms: maximal regularity and invariance
Form methods are a useful and elegant framework to study second order elliptic operators in divergence form. They can be used to describe such operators including various boundary conditions, such as Dirichlet, Neumann and ...
Geometrical and combinatorial optimization problems
In this habilitation thesis several geometrical and combinatorial optimization problems are considered. First we introduce the facility location ratio which is the supremum of the quotient of the cost of an optimal solution ...
Open innovation research - emerging methods of the digital era
This thesis applies and develops digital open innovation research methods and thereby attempts to broaden the understanding in this emerging field. Three digital methods to foster open innovation are examined. Netnography ...
A numerical framework for semi-automated reduced basis methods with blackbox solvers
The Reduced Basis Method (RBM) has become a widespread model reduction technique for parametrized partial differential equations in the past few years. Yet, it has not found its way into automated commercial or open-source ...
Understanding sovereign default risk from a market perspective - utilization of three approaches
In der Dissertation wird versucht mit drei Ansätzen dazu beizutragen, ein erweitertes Verständnis über die Bewertung von Staatsausfallrisiken aus der Perspektive des Marktes zu generieren. 1) Länder-Assetwerte werden mit ...
Utility maximization in incomplete markets in the presence of claims or random endowments
This thesis deals with two optimization problems of rational investors, who want to maximize their expected utility in the presence of random endowments or claims in incomplete markets. In Part I we focus on the problem ...
Models of curves and valuations
The Semistable Reduction Theorem by Deligne and Mumford states that any absolutely irreducible smooth projective curve over a field with a discrete valuation has a semistable model, at least if one admits a finite separable ...