Piotr Graczyk (Université d'Angers)
Title: Estimates of kernels associated with the Dyson and Dunkl processes.
Abstract: Dyson and Dunkl processes areÌýimportant stochastic processes modelizing uncolliding particle systems.Ìý Uncolliding Brownian particles wereÌýintroducedÌýby Dyson in 1962 andÌýlater called Dyson Brownian Motion.
It is a special case ofÌýradial Dunkl processes, called alsoÌýmultivariate Bessel processes. Dunkl operators were discovered by Dunkl in late 1980’s as a crucial tool to study Calogero-Moses-Sutherland mechanical particle systems.Ìý Dunkl processesÌý were introducedÌýby Roesler and Voit in 1998 and studied also by Gallardo and Yor.ÌýÌýÌý
In this talk I will present recent estimates ofÌý Poisson, Newton and Heat kernels for radial Dunkl processes, obtained in collaboration with Patrice Sawyer (Laurentian University). Our methods are based on harmonic and potential analysis related to root systems.
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