Affiliation: | (1) Department of Mathematics, University of Kansas, 405 Snow Hall, Lawrence, KS 66045, USA (e-mail: hu@math.ukans.edu) , US;(2) Department of Mathematics, University of Oslo, P.O. Box 1053 Blindern, N-0316 Oslo, Norway and Institute of Finance and Management Science, Norwegian School of Economics and Business Administration, Helleveien 30, N-5035 Bergen-Sandviken, Norway (e-mail: oksendal@math.uio.no) , NO |