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971.
In this paper, we define the generalized Gauss Weierstrass semigroups with Weierstrass kernel, and give some of their properties. Using them, we study the inversion formulas for the generalized Riesz and Bessel potentials, generated by the generalized shift operators and associated with the Laplace Bessel differential operator. 相似文献
972.
Herein, we consider the nonlinear filtering problem for general right continuous Markov processes, which are assumed to be associated with semi-Dirichlet forms. First, we derive the filtering equations in the semi-Dirichlet form setting. Then, we study the uniqueness of solutions of the filtering equations via the Wiener chaos expansions. Our results on the Wiener chaos expansions for nonlinear filters with possibly unbounded observation functions are novel and have their own interests. Furthermore, we investigate the absolute continuity of the filtering processes with respect to the reference measures and derive the density equations for the filtering processes. 相似文献
973.
M. Vilkienė 《Lithuanian Mathematical Journal》2009,49(2):234-239
In this paper, we obtain optimal bounds for convergence rate for Yosida approximations of bounded holomorphic semigroups.
We also provide asymptotic expansions for semigroups in terms of Yosida approximations and obtain optimal error bounds for
these expansions. 相似文献
974.
Dimitar K. Dimitrov Youssèf Ben Cheikh 《Journal of Computational and Applied Mathematics》2009,233(3):703-707
We prove that the only Jensen polynomials associated with an entire function in the Laguerre-Pólya class that are orthogonal are the Laguerre polynomials. 相似文献
975.
976.
We prove that the diagonal of the transition probabilities for the d-dimensional Bessel processes on (0, 1], reflected at 1, which we denote by , is an increasing function of r for d > 2 and that this is false for d = 2.
The first and third authors were supported in part by NSF grant # 0603701-DMS. The second author was supported in part by
KBN Grant 1 P03A 020 28. 相似文献
977.
We develop a time-dependent perturbation theory for nonequilibrium interacting particle systems. We focus on models such as the contact process which evolve via destruction and autocatalytic creation of particles. At a critical value of the destruction rate there is a continuous phase transition between an active steady state and the vacuum state, which is absorbing. We present several methods for deriving series for the evolution starting from a single seed particle, including expansions for the ultimate survival probability in the super- and subcritical regions, expansions for the average number of particles in the subcritical region, and short-time expansions. Algorithms for computer generation of the various expansions are presented. Rather long series (24 terms or more) and precise estimates of critical parameters are presented. 相似文献
978.
J. Slawny 《Journal of statistical physics》1983,32(2):375-388
The mean field bound on magnetization is proved for a class of one-component ferromagnetic systems and forD components systems with arbitraryD. 相似文献
979.
980.