RADONIFICATION OF CYLINDRICAL SEMIMARTINGALES BY A SINGLE HILBERT–SCHMIDT OPERATOR

Author:

JAKUBOWSKI ADAM1,KWAPIEŃ STANISŁAW2,DE FITTE PAUL RAYNAUD3,ROSIŃSKI JAN4

Affiliation:

1. Faculty of Mathematics and Computer Science, Nicholas Copernicus University, ul. Chopina 12/18, 87–100 Toruń, Poland

2. Institute of Mathematics, Warsaw University, ul. Banacha 2, 00-989 Warszawa, Poland

3. Laboratoire R. Salem, UMR CNRS 6085, UFR Sciences, Université de Rouen, 76821 Mont Saint Aignan Cedex, France

4. Department of Mathematics, University of Tennessee, Knoxville, TN 37996–1300, USA

Abstract

It is proved that in Hilbert spaces a single Hilbert–Schmidt operator radonifies cylindrical semimartingales to strong semimartingales. This improves a result due to Badrikian and Üstünel (also L. Schwartz), who needed composition of three Hilbert–Schmidt operators.

Publisher

World Scientific Pub Co Pte Lt

Subject

Applied Mathematics,Mathematical Physics,Statistics and Probability,Statistical and Nonlinear Physics

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