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In this chapter, we shall present some selected topics in application such as stochastic optimal control or stochastic population dynamics related to stochastic stability of stochastic differential equations in infinite dimensional spaces.
In this chapter, we shall present a stochastic stability theory of nonlinear stochastic differential equations in Hilbert spaces. We will employ semigroup and variational methods in a systematic way to deal with semilinear and nonlinear, nonautonomous systems, respectively.
In this chapter, we shall recall some definitions and results from functional analysis, partial differential equations, and probability theories. We introduce two notions of solutions, strong and mild, for stochastic differential equations in Hilbert spaces. We also introduce and clarify various definitions of stochastic stability in abstract spaces, which are a natural generalization of deterministic stability concepts.
The stability of stochastic differential equations in abstract, mainly Hilbert, spaces receives a unified treatment in this self-contained book. It covers basic theory as well as computational techniques for handling the stochastic stability of systems from mathematical, physical and biological problems. Its core material is divided into three parts devoted respectively to the stochastic stability of linear systems, non-linear systems, and time-delay systems. The focus is on stability of stochastic dynamical processes affected by white noise, which are described by partial differential equations such as the Navier–Stokes equations. A range of mathematicians and scientists, including those involved in numerical computation, will find this book useful. It is also ideal for engineers working on stochastic systems and their control, and researchers in mathematical physics or biology.