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WROCŁAW UNIVERSITY
OF SCIENCE AND
TECHNOLOGY

Contents of PMS, Vol. 28, Fasc. 2,
pages 345 - 357
 

FINE STRUCTURE OF THE COMPLEX HYPERBOLIC BROWNIAN MOTION AND RUDIN’S QUESTION

Piotr Graczyk
Tomasz Żak

Abstract: We investigate the fine structure of the complex hyperbolic Brownian motion in the unit ball of Cn  . It turns out that the generator of the process is locally very close to the generator of some simple transformation of the classical Brownian motion. This fact helps us to give an intuitive explanation why the invariant Laplace operator in the unit ball of Cn  is a difference of two ordinary Laplace operators - the question set by W. Rudin in his monograph Function Theory in the Unit Ball of Cn  .

In the second part of the paper we find stochastic differential equations for the complex hyperbolic Brownian motion on the ball model of the complex hyperbolic space and furnish in this way an important tool in a further investigation of this process.

2000 AMS Mathematics Subject Classification: Primary: 32A07, 58J65; Secondary: 32Q35, 60H10, 60J65.

Keywords and phrases: Complex hyperbolic space, complex hyperbolic Brownian motion, invariant Laplace operator.

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