Professor Jack K. Hale
is a world renowned leader and among the most influential persons
in the field of nonlinear dynamics in our age. He was an originator
and pioneer in many important areas in the interface of dynamical
systems and differential equations including nonlinear oscillations,
stability and bifurcation theory, functional differential equations,
and infinite-dimensional dynamical systems defined by
parabolic and hyperbolic equations. Professor Hale's
influence in the field has gone far beyond his papers and books.
By being a leading mathematician and a
person of exemplary character, he has had
tremendous impacts on the career
developments of many people around him and has brought the best
out of many of us working in the field.