Dokument-ID Dokumenttyp Verfasser/Autoren Herausgeber Haupttitel Abstract Auflage Verlagsort Verlag Erscheinungsjahr Seitenzahl Schriftenreihe Titel Schriftenreihe Bandzahl ISBN Quelle der Hochschulschrift Konferenzname Quelle:Titel Quelle:Jahrgang Quelle:Heftnummer Quelle:Erste Seite Quelle:Letzte Seite URN DOI Abteilungen OPUS4-2834 Konferenzveröffentlichung Cacao, Isabel; Constales, Denis; Kraußhar, Rolf Sören Gürlebeck, Klaus; Könke, Carsten A UNIFIED APPROACH FOR THE TREATMENT OF SOME HIGHER DIMENSIONAL DIRAC TYPE EQUATIONS ON SPHERES Using Clifford analysis methods, we provide a unified approach to obtain explicit solutions of some partial differential equations combining the n-dimensional Dirac and Euler operators, including generalizations of the classical time-harmonic Maxwell equations. The obtained regular solutions show strong connections between hypergeometric functions and homogeneous polynomials in the kernel of the Dirac operator. 8 urn:nbn:de:gbv:wim2-20170314-28343 10.25643/bauhaus-universitaet.2834 In Zusammenarbeit mit der Bauhaus-Universität Weimar OPUS4-2936 Konferenzveröffentlichung Cacao, Isabel; Constales, Denis; Kraußhar, Rolf Sören Gürlebeck, Klaus; Könke, Carsten BESSEL FUNCTIONS AND HIGHER DIMENSIONAL DIRAC TYPE EQUATIONS In this paper we study the structure of the solutions to higher dimensional Dirac type equations generalizing the known λ-hyperholomorphic functions, where λ is a complex parameter. The structure of the solutions to the system of partial differential equations (D- λ) f=0 show a close connection with Bessel functions of first kind with complex argument. The more general system of partial differential equations that is considered in this paper combines Dirac and Euler operators and emphasizes the role of the Bessel functions. However, contrary to the simplest case, one gets now Bessel functions of any arbitrary complex order. 8 urn:nbn:de:gbv:wim2-20170327-29366 10.25643/bauhaus-universitaet.2936 In Zusammenarbeit mit der Bauhaus-Universität Weimar OPUS4-2863 Konferenzveröffentlichung Constales, Denis; Kraußhar, Rolf Sören Gürlebeck, Klaus; Könke, Carsten ON THE KLEIN-GORDON EQUATION ON THE 3-TORUS In this paper we consider the time independent Klein-Gordon equation on some conformally flat 3-tori with given boundary data. We set up an explicit formula for the fundamental solution. We show that we can represent any solution to the homogeneous Klein-Gordon equation on the torus as finite sum over generalized 3-fold periodic elliptic functions that are in the kernel of the Klein-Gordon operator. Furthermore we prove Cauchy and Green type integral formulas and set up a Teodorescu and Cauchy transform for the toroidal Klein-Gordon operator. These in turn are used to set up explicit formulas for the solution to the inhomogeneous version of the Klein-Gordon equation on the 3-torus. 10 urn:nbn:de:gbv:wim2-20170314-28639 10.25643/bauhaus-universitaet.2863 In Zusammenarbeit mit der Bauhaus-Universität Weimar OPUS4-2938 Konferenzveröffentlichung Constales, Denis; Kraußhar, Rolf Sören Gürlebeck, Klaus; Könke, Carsten ON THE NAVIER-STOKES EQUATION WITH FREE CONVECTION IN STRIP DOMAINS AND 3D TRIANGULAR CHANNELS The Navier-Stokes equations and related ones can be treated very elegantly with the quaternionic operator calculus developed in a series of works by K. Guerlebeck, W. Sproeossig and others. This study will be extended in this paper. In order to apply the quaternionic operator calculus to solve these types of boundary value problems fully explicitly, one basically needs to evaluate two types of integral operators: the Teodorescu operator and the quaternionic Bergman projector. While the integral kernel of the Teodorescu transform is universal for all domains, the kernel function of the Bergman projector, called the Bergman kernel, depends on the geometry of the domain. With special variants of quaternionic holomorphic multiperiodic functions we obtain explicit formulas for three dimensional parallel plate channels, rectangular block domains and regular triangular channels. The explicit knowledge of the integral kernels makes it then possible to evaluate the operator equations in order to determine the solutions of the boundary value problem explicitly. 12 urn:nbn:de:gbv:wim2-20170327-29387 10.25643/bauhaus-universitaet.2938 In Zusammenarbeit mit der Bauhaus-Universität Weimar OPUS4-2846 Konferenzveröffentlichung Grob, Dennis; Constales, Denis; Kraußhar, Rolf Sören Gürlebeck, Klaus; Könke, Carsten THE HYPERCOMPLEX SZEGÖ KERNEL METHOD FOR 3D MAPPING PROBLEMS In this paper we present rudiments of a higher dimensional analogue of the Szegö kernel method to compute 3D mappings from elementary domains onto the unit sphere. This is a formal construction which provides us with a good substitution of the classical conformal Riemann mapping. We give explicit numerical examples and discuss a comparison of the results with those obtained alternatively by the Bergman kernel method. 7 urn:nbn:de:gbv:wim2-20170314-28464 10.25643/bauhaus-universitaet.2846 In Zusammenarbeit mit der Bauhaus-Universität Weimar OPUS4-2912 Konferenzveröffentlichung Kraußhar, Rolf Sören; Constales, Denis; Gürlebeck, Klaus; Sprößig, Wolfgang Gürlebeck, Klaus; Könke, Carsten APPLICATIONS OF QUATERNIONIC ANALYSIS IN ENGINEERING The quaternionic operator calculus can be applied very elegantly to solve many important boundary value problems arising in fluid dynamics and electrodynamics in an analytic way. In order to set up fully explicit solutions. In order to apply the quaternionic operator calculus to solve these types of boundary value problems fully explicitly, one has to evaluate two types of integral operators: the Teodorescu operator and the quaternionic Bergman projector. While the integral kernel of the Teodorescu transform is universal for all domains, the kernel function of the Bergman projector, called the Bergman kernel, depends on the geometry of the domain. Recently the theory of quaternionic holomorphic multiperiodic functions and automorphic forms provided new impulses to set up explicit representation formulas for large classes of hyperbolic polyhedron type domains. These include block shaped domains, wedge shaped domains (with or without additional rectangular restrictions) and circular symmetric finite and infinite cylinders as particular subcases. In this talk we want to give an overview over the recent developments in this direction. 8 urn:nbn:de:gbv:wim2-20170327-29128 10.25643/bauhaus-universitaet.2912 Professur Angewandte Mathematik