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Download or read book Some Topics on Dirichlet Forms and Non-symmetric Markov Processes written by Jing Zhang and published by . This book was released on 2016 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, we discuss three topics on Dirichlet forms and non-symmetric Markov processes. First, we explore the analytic structure of non-symmetric Markov processes. Let U be an open set of Rn, m a positive Radon measure on U, and (Pt)t>0 a strongly continuous contraction sub-Markovian semigroup on L2(U;m). We give an explicit Lev́y-Khintchine type representation of the generator A of (Pt)t>0. If (Pt)t>0 is an analytic semigroup, we give an explicit characterization of the semi-Dirichlet form E associated with (Pt)t>0. Second, we consider the Dirichlet boundary value problem for a general class of second order non-symmetric elliptic operators L with singular coefficients. We show that there exists a unique, bounded continuous solution by using the theory of Dirichlet forms and heat kernel estimates. Also, we give a probabilistic representation of the non-symmetric semigroup generated by L. Finally, we present new results on Hunt's hypothesis (H) for Levy processes. These include a comparison result on Levy processes which implies that big jumps have no effect on the validity of (H), a new necessary and sufficient condition for (H), and an extended Kanda-Forst-Rao theorem.