A relativistic diffusion model in kinetic theory Alcántara Félix, José Antonio Calogero, Simone Universidad de Granada. Programa Oficial de Doctorado en: Física y Matemáticas Ecuaciones diferenciales en derivadas parciales Teoría de la relatividad Amplitud de dispersión (Física nuclear) Física estadística Teoría cuántica Teoría cinética de la materia The main objective of this dissertation is the analysis of solutions to a class of linear and non-linear parabolic partial differential equations (PDEs) in phase space for dimensions greater or equal than three. In particular, these equations can be used to describe diffusion dynamics in a relativistic setting. This study is motivated not only by the vast range of applications of diffusion models, but also by the still poor understanding of the mathematical techniques involved in this study. In fact, the diffusion term in the models to be considered is non-uniformly elliptic and spatially degenerate, i.e., some spatial derivatives are absent in the diffusion operator. Moreover, for some of the models studied in this thesis, the coefficients of the diffusion equation depend on the time variable. These properties distinguish the models under discussion from the other diffusion models studied in the literature and warn that the standard techniques for parabolic PDEs might not apply to our framework. 2016-11-10T08:51:25Z 2016-11-10T08:51:25Z 2016 2016-01-28 info:eu-repo/semantics/doctoralThesis Alcántara Félix, J. A. A relativistic diffusion model in kinetic theory. Granada: Universidad de Granada, 2016. [http://hdl.handle.net/10481/43314] 9788491256816 http://hdl.handle.net/10481/43314 eng http://creativecommons.org/licenses/by-nc-nd/3.0/ info:eu-repo/semantics/openAccess Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License Universidad de Granada