Search for dissertations about: "neutral theory"
Showing result 11 - 15 of 112 swedish dissertations containing the words neutral theory.
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11. Genetic variation in structured populations
Abstract : It is widely acknowledged that the process of speciation in the presence of gene flow between different ecotypes is common in nature. However, the mechanisms underlying speciation are not understood. READ MORE
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12. Some Extensions of Fractional Ornstein-Uhlenbeck Model : Arbitrage and Other Applications
Abstract : This doctoral thesis endeavors to extend probability and statistical models using stochastic differential equations. The described models capture essential features from data that are not explained by classical diffusion models driven by Brownian motion.New results obtained by the author are presented in five articles. READ MORE
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13. Topics in Mean-Field Control and Games for Pure Jump Processes
Abstract : This thesis is the collection of four papers addressing topics in stochastic optimal control, zero-sum games, backward stochastic differential equations, Pontryagin stochastic maximum principle and relaxed stochastic optimal control.In the first two papers, we establish existence of Markov chains of mean-field type, with countable state space and unbounded jump intensities. READ MORE
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14. Four applications of stochastic processes : Contagious disease, credit risk, gambling and bond portfolios
Abstract : This thesis consists of four papers on applications of stochastic processes. In Paper I we study an open population SIS (Susceptible - Infective - Susceptible) stochastic epidemic model from the time of introduction of the disease, through a possible outbreak and to extinction. The analysis uses coupling arguments and diffusion approximations. READ MORE
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15. Spatial Statistics and Ancestral Recombination Graphs with Applications in Gene Mapping and Geostatistics
Abstract : This thesis explores models and algorithms in geostatistics and gene mapping. The first part deals with the use of computationally effective lattice models for inference of data with a continuous spatial index. READ MORE