An extension of bifractional Brownian motion

Xavier Bardina, Khalifa Es-Sebaiy

Published 2010-02-19, updated 2011-05-09Version 2

In this paper we introduce and study a self-similar Gaussian process that is the bifractional Brownian motion $B^{H,K}$ with parameters $H\in (0,1)$ and $K\in(1,2)$ such that $HK\in(0,1)$. A remarkable difference between the case $K\in(0,1)$ and our situation is that this process is a semimartingale when $2HK=1$.