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Next section 4 develops the notion of reduced Witt vectors; this is used to compute the Artin-Schreier-Witt symbol in section 5 and thus to describe the ramification groups for
In particular, joint semigroup densities of the eigenvalue processes of the generalized matrix-valued Ornstein-Uhlenbeck and squared Ornstein- Uhlenbeck processes are
In this note, we study the asymptotic behaviour of Lévy processes with no positive jumps condi- tioned to stay positive and some related processes. In particular, we establish
Keywords: Duality, graphical representation, Feller’s branching diffusion, branching-coalescing particle process, resampling-selection model, stochastic population
Stochastic fixed point equation, weighted branching process, infinite divisibility, L´evy measure, Choquet-Deny theorem, stable distributions.. AMS 2000
Keywords interacting diffusion, clustering, infinite particle system, delayed coalescing random walk with immigration, transformed Fisher-Wright tree, low dimensional systems,
The expression just obtained for the distribution of coalescing Brownian motions is closely related to the formula for the transition density of the interlaced Brownian motions given
Berman has extended in [10] his definition of local nondeterminism to a wide class of stochastic processes, and has refined his previous results under an assumption of higher
