Stochastic Integral Equations for Walsh Semimartingales
Probability
2016-03-01 v2
Abstract
We construct planar semimartingales that include the Walsh Brownian motion as a special case, and derive Harrison-Shepp-type equations and a change-of-variable formula in the spirit of Freidlin-Sheu for these so-called "Walsh semimartingales". We examine the solvability of the resulting system of stochastic integral equations. In appropriate Markovian settings we study two types of connections to martingale problems, questions of uniqueness in distribution for such processes, and a few examples.
Cite
@article{arxiv.1505.02504,
title = {Stochastic Integral Equations for Walsh Semimartingales},
author = {Tomoyuki Ichiba and Ioannis Karatzas and Vilmos Prokaj and Minghan Yan},
journal= {arXiv preprint arXiv:1505.02504},
year = {2016}
}
Comments
39 pages