The local properties of the Markov processes of Ornstein-Uhlenbeck type

Abstract: We prove the existence of a local time, the continuity of the local time about $t$, and the regular property for $a.e.$ $x\in R$ of a Ornstein-Uhlenbeck type ${X_t,\ t\in R^+}$ driven by a general L\'{e}vy process, under mild regularity conditions. We discuss the asymptotic behaviour of the local time when $X$ is ergodic. We also investigate the first passage problem. These results give precise information about the local properties of the sample functions.