Brownian Motion Indexed by a Time Scale

In this article, we generalize Wiener's existence result for one-dimensional Brownian motion by constructing a suitable continuous stochastic process where the index set is a time scale. We construct a countable dense subset of a time scale and use it to prove a generalized version of the Kolmogorov-Centsov theorem. As a corollary, we obtain a local Holder-continuity result for the sample paths of generalized Brownian motion indexed by a time scale.