The main purpose of the book is to show how a viscosity approach can be
used to tackle control problems in insurance. The problems covered are
the maximization of survival probability as well as the maximization of
dividends in the classical collective risk model. The authors consider
the possibility of controlling the risk process by reinsurance as well
as by investments. They show that optimal value functions are
characterized as either the unique or the smallest viscosity solution of
the associated Hamilton-Jacobi-Bellman equation; they also study the
structure of the optimal strategies and show how to find them.
The viscosity approach was widely used in control problems related to
mathematical finance but until quite recently it was not used to solve
control problems related to actuarial mathematical science. This book is
designed to familiarize the reader on how to use this approach. The
intended audience is graduate students as well as researchers in this
area.