K. David Elworthy - Böcker
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4 produkter
4 produkter
588 kr
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Filtering is the science of nding the law of a process given a partial observation of it. The main objects we study here are di usion processes. These are naturally associated with second-order linear di erential operators which are semi-elliptic and so introduce a possibly degenerate Riemannian structure on the state space. In fact, much of what we discuss is simply about two such operators intertwined by a smooth map, the \projection from the state space to the observations space", and does not involve any stochastic analysis. From the point of view of stochastic processes, our purpose is to present and to study the underlying geometric structure which allows us to perform the ltering in a Markovian framework with the resulting conditional law being that of a Markov process which is time inhomogeneous in general. This geometry is determined by the symbol of the operator on the state space which projects to a symbol on the observation space. The projectible symbol induces a (possibly non-linear and partially de ned) connection which lifts the observation process to the state space and gives a decomposition of the operator on the state space and of the noise. As is standard we can recover the classical ltering theory in which the observations are not usually Markovian by application of the Girsanov- Maruyama-Cameron-Martin Theorem. This structure we have is examined in relation to a number of geometrical topics.
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Kunita, H.:Stochastic differential equations and stochastic flows of diffeomorphisms.-Elworthy, D.: Geometric aspects of diffusions on manifolds.-Ancona, A.:Théorie du potential sur les graphs et les variétiés.-Emery, M.:Continuous martingales in differentiable manifolds. ?
Stochastic Analysis And Applications - Proceedings Of The Fifth Gregynog Symposium
Inbunden, Engelska, 1996
2 760 kr
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This volume contains papers which were presented at a meeting entitled “Stochastic Analysis and Applications“ held at Gregynog Hall, Powys, from the 9th — 14th July 1995. The meeting consisted of a mixture of plenary/review talks and special interest sessions covering most of the current areas of activity in stochastic analysis. The meeting was jointly organized by the Department of Mathematics, University of Wales Swansea and the Mathematics Institute, University of Warwick in connection with the Stochastic Analysis year of activity. The papers contained herein are accessible to workers in the field of stochastic analysis and give a good coverage of topics of current interest in the research community.
New Trends In Stochastic Analysis: Proceedings Of The Tanaguchi International Symposium
Inbunden, Engelska, 1997
2 344 kr
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The Taniguchi International workshop on "New Trends in Stochastic Analysis" was held at Charingworth Manor, Gloucestershire, England from September 21-27, 1994. The workshop was followed by a symposium held with the Mathematics Research Centre of the University of Warwick from Sep 28 to Oct 1. In these meetings several of the new directions that stochastic analysis is taking were discussed, ranging from analysis on fractals to analysis on loop spaces.This volume contains articles by 15 participants, reflecting this range of topics. Amongst them are discussed: Sobolev and logrithmic Sobolev inequalities for Markov semigroups, asymptotics for heat equations on the exterior of convex domains, 2 D stochastic Ising models, reaction diffusion equations with noise and new approaches to infinite dimensional stochastic analysis including a Malliavin type calculus for equations driven by "rough signals".