Now showing items 1-10 of 129
Reduced-basis method (RBM) for non-affine elliptic parametrized PDEs - (motivated by optimization in hydromechanics)
This work has been motivated by optimizing the efficiency of a ship-propulsion device, the Voith-Schneider Propeller, w.r.t. its steering (determined by the so-called blade-steering curve). We consider a simplified model ...
Characteristics of Poisson cylinder processes and their estimation
In this thesis, we consider stationary Poisson cylinder processes (PCPs). Here, a cylinder is defined as the Minkowski sum of a linear vectorspace and a polyconvex set in the orthogonal space. A PCP is a random set of ...
Consumption-investment problems with state-dependent discounting
In this thesis we analyze consumption-investment problems with state-dependent discounting. We assume that the investor discounts his future utility by a non-exponential discount function which depends on his personal ...
This thesis primarily gives an overview of research on so called betweenness relations with a focus on own contributions to that subject. Betweenness relations represent a generalisation of the geometric notion that one ...
Invariant sets and long time behaviour of operator semigroups
(Universität Ulm, 2017-02-10)
In this PhD thesis, strongly continuous operator semigroups are studied. We show that contractivity or positivity of such a semigroup can have a profound impact on its long time behaviour. Moreover, we perform a detailed ...
Unconditional and conditional institutional effects on unemployment: a Bayesian model averaging approach
Labor and product market institutions are regarded as central factors for explaining differences in the evolution of unemployment across countries. It is generally assumed that reforms which serve to reduce institutional ...
Exchangeability of copulas
(Universität Ulm, 2016-07-08)
When studying the dependence structure of multivariate random vectors, the copula is crucial. A copula is called exchangeable, if it is invariant under any permutation of its arguments. In this thesis, a limit for the ...
Cycle decompositions and t-perfect graphs
(Universität Ulm, 2017-10-18)
The thesis is divided into two parts. The first part deals with t-perfect graphs. A graph is called t-perfect if its stable set polytope is fully described by non-negativity, edge and odd-cycle constraints. We give ...
Hebbarkeit singulärer Mengen der m-Hesse-Gleichungen
(Universität Ulm, 2017-11-06)
In dieser Arbeit geben wir eine neue, weniger restriktive Forderung für die Hebbarkeit singulärer Mengen E von glatten Lösungen der m-Hesse Gleichung (und auch für allgemeinere nichtlineare elliptische Gleichungen) auf ...
Exponential domination, exponential independence, and the clustering coefficient
(Universität Ulm, 2017-11-22)
This dissertation contains four research papers. The first two papers are about exponential domination in graphs, which is a variant of domination in graphs. In the first paper, we show results about the corresponding ...