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An extension of Wiener integration with the use of operator theory
Journal article   Open access   Peer reviewed

An extension of Wiener integration with the use of operator theory

Palle E.T Jorgensen and Myung Sin Song
Journal of Mathematical Physics, Vol.50(10), pp.103502-103502-11
2009
DOI: 10.1063/1.3196622

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Abstract

With the use of tensor product of Hilbert space and a diagonalization procedure from operator theory, we derive an approximation formula for a general class of stochastic integrals. Further we establish a generalized Fourier expansion for these stochastic integrals. In our extension, we circumvent some of the limitations of the more widely used stochastic integral due to Wiener and Ito, i.e., stochastic integration with respect to Brownian motion. Finally we discuss the connection between the two approaches, as well as a priori estimates and applications.

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