This book is based on lectures given at the Global Analysis Research
Center (GARC) of Seoul National University in 1999and at Peking
University in 1999and 2000. Preliminary versions of the book have been
used for various topics courses in analysis for graduate students at
York University. We study in this book wavelet transforms and
localization operators in the context of infinite-dimensional and
square-integrable representations of locally compact and
Hausdorffgroups. The wavelet transforms studied in this book, which
include the ones that come from the Weyl-Heisenberg group and the
well-known affine group, are the building blocks of localization
operators. The theme that dominates the book is the spectral theory of
wavelet transforms and localization operators in the form of
Schatten-von Neumann norm inequalities. Several chap- ters are also
devoted to the product formulas for concrete localization operators such
as Daubechies operators and wavelet multipliers. This book is a natural
sequel to the book on pseudo-differential operators [103] and the book
on Weyl transforms [102] by the author. Indeed, localization operators
on the Weyl-Heisenberg group are Weyl transforms, which are in fact
pseudo-differential operators. Details on the perspective and the
organization of the book are laid out in the first chapter. This is a
book on mathematics and is written for anyone who has taken basic
graduate courses in measure theory and functional analysis. Some
knowledge of group theory and general topology at the undergraduate
level is also assumed.