Advances in Filtering and Optimal Stochastic Control : Proceedings of the IFIP WG 7 1 Working Conference Cocoyoc Mexico February 1 6 1982 Existence uniqueness and tail behavior of solutions to Zakai equations with unbounded coefficients Optimal stopping under partial observations Optimal control of partially observed diffusions Accurate evaluation of conditional densities in nonlinear filtering An efficient approximation scheme for a class of stochastic differential equations Stochastic control with noisy observations Applications of duality to measure valued diffusion processes Optimal stopping of controlled Markov processes Two parameter filtering equations for jump process semimartingales Space time mixing in a branching model Logarithmic transformations and stochastic control Generalized Gaussian random solutions of certain evolution equations Extremal controls for completely observable diffusions Lévys stochastic area formula in higher dimensions Asymptotic nonlinear filtering and large deviations Representation and approximation of counting processes Approximate invariant measures for the asymptotic distributions of differential equations with wide band noise inputs Optimal stochastic control of diffusion type processes and Hamilton Jacobi Bellman equations On reducing the dimension of control problems by diffusion approximation Lie algebraic and approximation methods for some nonlinear filtering problems Optimal stopping for two parameter processes Stochastic control problem for reflected diffusions in a convex bounded domain Nonlinear filtering of diffusion processes a guided tour Note on uniqueness of semigroup associated with Bellman operator PDE with random coefficients: Asymptotic expansion for the moments A discrete time stochastic decision model On the approximation of controlled jump diffusion processes On optimal stochastic control problem of large systems Unnormalized conditional probabilities and optimality for partially observed controlled jump Markov processes On normal approximation in Banach spaces A class of problems in the optimal control of diffusions with finitely many controls A resumé of some of the applications of Malliavins calculus Large deviations.