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This special volume of the ESAIM Journal, Mathematical Modelling and Numerical Analysis,
contains a collection of articles on probabilistic interpretations of
some classes of nonlinear integro-differential equations.
The selected contributions deal with a wide range of topics in applied probability theory and stochastic analysis,
with applications in a variety of scientific disciplines, including
physics, biology, fluid
mechanics, molecular chemistry, financial mathematics and bayesian statistics....
A synthesis of recent development of regime-switching models based on aggregation operators is presented. It comprises procedures for model specification and identification, parameter estimation and model adequacy testing. Constructions of models for real life data from hydrology and finance are presented.
The application of Nekhoroshev theory to selected physical systems, interesting for Celestial Mechanics, is here reviewed. Applications include the stability of motions in the weakly perturbed Euler-Poinsot rigid body and the stability of the so-called Lagrangian equilibria , in the spatial circular restricted three-body problem. The difficulties to be overcome, which require a nontrivial extension of the standard Nekhoroshev theorem, are the presence of singularities in the fiber structure...
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