Abstract
In this paper we define a new type of quadratic variation for cylindrical continuous local martingales on an infinite dimensional spaces. It is shown that a large class of cylindrical continuous local martingales has such a quadratic variation. For this new class of cylindrical continuous local martingales we develop a stochastic integration theory for operator valued processes under the condition that the range space is a UMD Banach space. We obtain two-sided estimates for the stochastic integral in terms of the $\gamma $-norm. In the scalar or Hilbert case this reduces to the Burkholder-Davis-Gundy inequalities. An application to a class of stochastic evolution equations is given at the end of the paper.
Citation
Mark Veraar. Ivan Yaroslavtsev. "Cylindrical continuous martingales and stochastic integration in infinite dimensions." Electron. J. Probab. 21 1 - 53, 2016. https://doi.org/10.1214/16-EJP7
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