Polarity for a class of Levy processes

Polar set of Markov processes is an important concept in probabilistic potential theory, but it is not easy to judge the polarity of the sets. In this paper, we give some results which can be easily used to examine the polarity of the sets whenX _t belongs to a special class of Levy processes. We also give a result about polar functions of symmetric stable processes. Biography: Wu Chuan-ju(1974-), Ph. D candidate, research direction: theory and application of stochastic processes.