(1) Department of Mathematics, Beijing Normal University, 100875 Beijing, China
Abstract:
LetXt be the interaction measured-valued branchingα-symmetric stable process overRd (1< α ≤2) constructed by Meleard-Roelly1]. Frist, it is shown thatXt is absolutely continuous with respect to the Lebesgue measure (onR) with a continuous density function which satisfies some SPDE. Second, it is proved that if the underlying process is a Brownian
motion onRd(d≤3), the corresponding occupation-time processYt is also absolutely continuous with respect to the Lebesgue measure.