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Hyperbolic and fractional hyperbolic Brownian motion

We examine the hyperbolic, planar Brownian motion and its time-fractional version. The analogy between the hyperbolic Brownian motion and Brownian motion on the sphere is also analysed. We examine in detail the connection between the equations governing the distributions in the Cartesian and hyperbolic coordinates. We discuss the time-fractional generalization of hyperbolic Brownian motion and give a representation of it as composition of classical hyperbolic Brownian motion with a reflecting Brownian motion on the line.