E-Dissertationen: Search
Now showing items 151-160 of 215
Ricci curvature and gradient flows of the entropy for jump processes
(2013-04-03)
In the first part of this thesis, we present a new notion of Ricci curvature that applies to finite Markov chains. This notion relies on geodesic convexity of the entropy and is analogous to the one introduced by Lott--Villani ...
Finite Volume Methods for Advection Diffusion on Moving Interfaces and Application on Surfactant Driven Thin Film Flow
(2013-01-04)
The thesis is divided into two parts. First, we present two finite volumes schemes for the discretization of convection-diffusion-reaction problems on moving surfaces. The first scheme extends the two point flux approximation ...
Numerische Simulation von Knochenumbauvorgängen um zahnärztliche Implantate mit der Finite-Elemente-Methode
(2013-01-23)
Zur Untersuchung der Knochenumbauvorgänge sind neben klinischen auch biomechanische Methoden, die den Hauptgegenstand der vorliegenden Arbeit bilden, von besonderer Bedeutung. Insbesondere numerische Simulationen der ...
Factorability, Discrete Morse Theory and a Reformulation of K(π, 1)-conjecture
(2013-02-20)
The first aim of this thesis is to study factorable groups and monoids. We give a new family of examples for factorability structures, provided by Garside theory, in particular, we provide a factorability structure on braid ...
Gromov-Witten correspondences, derived categories, and Frobenius manifolds
(2013-02-21)
In this thesis we consider questions arising in Gromov-Witten theory, quantum cohomology and mirror symmetry. The first two chapters deal with Gromov-Witten theory and derived categories for moduli spaces of stable curves ...
On the relaxation of a variational principle for the motion of a vortex sheet in perfect fluid
(2013-03-14)
A certain two-phase model is considered, which stands some relation with a description of the vortex sheet configuration in a perfect fluid.
Both a sharp and a relaxed version of the evolution can be understood as ...
Both a sharp and a relaxed version of the evolution can be understood as ...
Two-row Springer fibers, foams and arc algebras of type D
(2017-08-15)
This thesis is concerned with the geometry, topology and combinatorics arising in the study of arc algebras of types Bm-1 and Dm. These algebras are closely related to infinite-dimensional representation ......
Period, Central Charge and Effective Action on Ricci-Flat Manifolds with Special Holonomy
(2017-06-30)
Motivated by the Gamma conjecture, we introduce a notion of numerical vectors, such as Chern character and Mukai vector, and a notion of numerical t-stabilities and numerical slope functions on triangulated categories. The ...
Singular integrals and maximal operators related to Carleson's theorem and curves in the plane
(2017-08-15)
In this thesis we study several different operators that are related to Carleson's theorem and curves in the plane.
An interesting open problem in harmonic analysis is the study of analogues of Carleson's operator ...
An interesting open problem in harmonic analysis is the study of analogues of Carleson's operator ...
Parametric Model Order Reduction Using Sparse Grids
(2017-09-29)
In applications such as very large scale integration chip design models are typically huge. The same is true in mechanical engineering, especially when the models are complex finite element discretizations. To speed up ...