Search for dissertations about: "random walks"

Showing result 1 - 5 of 20 swedish dissertations containing the words random walks.

  1. 1. Random Geometry and Reinforced Jump Processes

    University dissertation from Lund University, Faculty of Science, Centre for Mathematical Sciences, Mathematical Statistics

    Author : Tuan-Minh Nguyen; Lunds universitet.; Lund University.; Lund University.; [2017-11]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; random polygons; products of random matrices; vertex-reinforced jump processes; pseudotrajectories; random walks in simplexes; Markov chains in a general state space;

    Abstract : This thesis comprises three papers studying several mathematical models related to geometric Markov processes and random processes with reinforcements. The main goal of these works is to investigate the dynamics as well as the limiting behaviour of the models as time goes to infinity, the existence of invariant measures and limiting distributions, the speed of convergence and other interesting relevant properties. READ MORE

  2. 2. Studies in respondent-driven sampling Directed networks, epidemics, and random walks

    University dissertation from Stockholm : Department of Mathematics, Stockholm University

    Author : Jens Malmros; Stockholms universitet.; [2016]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; matematisk statistik; Mathematical Statistics;

    Abstract : Respondent-driven sampling (RDS) is a link-tracing sampling methodology especially suitable for sampling hidden populations. A clever sampling mechanism and inferential procedures that facilitate asymptotically unbiased population estimates has contributed to the rising popularity of the method. READ MORE

  3. 3. On Directed Random Graphs and Greedy Walks on Point Processes

    University dissertation from Uppsala : Department of Mathematics

    Author : Katja Gabrysch; Uppsala universitet.; [2016]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Directed random graphs; Tracy-Widom distribution; Poisson-weighted infinite tree; Greedy walk; Point processes;

    Abstract : This thesis consists of an introduction and five papers, of which two contribute to the theory of directed random graphs and three to the theory of greedy walks on point processes.          We consider a directed random graph on a partially ordered vertex set, with an edge between any two comparable vertices present with probability p, independently of all other edges, and each edge is directed from the vertex with smaller label to the vertex with larger label. READ MORE

  4. 4. Cover Times, Sign-dependent Random Walks, and Maxima

    University dissertation from Stockholm : Matematik

    Author : Anna Carlsund; KTH.; [2003]
    Keywords : ;

    Abstract : .... READ MORE

  5. 5. Limit Theorems for Ergodic Group Actions and Random Walks

    University dissertation from Stockholm : KTH

    Author : Michael Björklund; KTH.; [2009]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; MATHEMATICS; MATEMATIK;

    Abstract : This thesis consists of an introduction, a summary and 7 papers. The papers are devoted to problems in ergodic theory, equidistribution on compact manifolds and random walks on groups.In Papers A and B, we generalize two classical ergodic theorems for actions of abelian groups. READ MORE