An extension theorem to rough paths
Cones of Lower Semicontinuous Functions and a Characterisation of Finely Hyperharmonic Functions.
An application of fine potential theory to prove a Phragmen Lindelöf theorem
We give a new proof of a Phragmén Lindelöf theorem due to W.H.J. Fuchs and valid for an arbitrary open subset of the complex plane: if is analytic on , bounded near the boundary of , and the growth of is at most polynomial then either is bounded or for some positive and has a simple pole.
Differential equations driven by rough signals.
This paper aims to provide a systematic approach to the treatment of differential equations of the type dyt = Σi fi(yt) dxt i where the driving signal xt is a rough path. Such equations are very common and occur particularly frequently in probability where the driving signal might be a vector valued Brownian...
Extending the Wong-Zakai theorem to reversible Markov processes
We show how to construct a canonical choice of stochastic area for paths of reversible Markov processes satisfying a weak Hölder condition, and hence demonstrate that the sample paths of such processes are rough paths in the sense of Lyons. We further prove that certain polygonal approximations to these paths and their areas converge in -variation norm. As a corollary of this result and standard properties of rough paths, we are able to provide a significant generalization of the classical result...
Smoothness of Itô maps and diffusion processes on path spaces (I)
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