Quantum groups have been investigated rather deeply in mathematical
physics over the last decade. Among the most prominent contributions in
this area let us mention the works of V.G. Drinfeld, S.L. Woronowicz, S.
Majid. Prob ability the- ory on quantum groups has developed in several
directions (see works of P. Biane, RL. Hudson and K.R Partasarathy, P.A.
Meyer, M. Schürmann, D. Voiculescu). The aim of this book is to present
several new aspects related to quantum groups: operator calculus, dual
representations, stochastic processes and diffusions, Appell polynomials
and systems in connection with evolution equations. Much of the ma-
terial is scattered throughout available literature, however, we have
nowhere found in accessible form all of this material collected. The
presentation of representation theory in connection with Appell systems
is original with the authors. Stochastic processes (example: Brownian
motion, diffusion processes, Levy processes) are in- vestigated and
several examples are presented. As a text the work is intended to be
accessible to graduate students and researchers not specialised in
quantum prob ability. We would like to acknowledge our colleagues P.
Feinsilver, R Lenzceswki, D.