Differentiated shift-invariant multivariate integral operators.
Nous étendons les notions de processus croissants associés à un processus au cas des processus à paramètre bidimensionnel : existence et égalité de limites de sommes de carrés d’accroissements (conditionnés ou non) sur des rectangles, sur des segments parallèles, ou mixtes.
The Diffusion Monte Carlo method is devoted to the computation of electronic ground-state energies of molecules. In this paper, we focus on implementations of this method which consist in exploring the configuration space with a fixed number of random walkers evolving according to a stochastic differential equation discretized in time. We allow stochastic reconfigurations of the walkers to reduce the discrepancy between the weights that they carry. On a simple one-dimensional example, we prove...