Nonlinear transformations of the canonical gauss measure on Hilbert space and absolute continuity |
| |
Authors: | G. Kallianpur R. L. Karandikar |
| |
Affiliation: | (1) Center for Stochastic Processes, Department of Statistics, University of North Carolina, 27599-3260 Chapel Hill, NC, USA;(2) Indian Statistical Institute, 110016 New Delhi, India;(3) Center for Stochastic Processes, University of North Carolina, 27599-3260 Chapel Hill, NC, USA |
| |
Abstract: | The papers of R. Ramer and S. Kusuoka investigate conditions under which the probability measure induced by a nonlinear transformation on abstract Wiener space(,H,B) is absolutely continuous with respect to the abstract Wiener measure. These conditions reveal the importance of the underlying Hilbert spaceH but involve the spaceB in an essential way. The present paper gives conditions solely based onH and takes as its starting point, a nonlinear transformationT=I+F onH. New sufficient conditions for absolute continuity are given which do not seem easily comparable with those of Kusuoka or Ramer but are more general than those of Buckdahn and Enchev. The Ramer-Itô integral occurring in the expression for the Radon-Nikodym derivative is studied in some detail and, in the general context of white noise theory it is shown to be an anticipative stochastic integral which, under a stronger condition on the weak Gateaux derivative of F is directly related to the Ogawa integral.Research supported by the National Science Foundation and the Air Force Office of Scientific Research Grant No. F49620 92 J 0154 and the Army Research Office Grant No. DAAL 03 92 G 0008. |
| |
Keywords: | Primary: 60B11 60H05 60H07 Secondary: 28C20 46G12 |
本文献已被 SpringerLink 等数据库收录! |
|