This book is an introduction to constructive mathematics with an
emphasis on techniques and results that have been obtained in the last
twenty years. It is the only book to deal with developments in
Bishop-style constructive analysis over the past 20 years. The text
covers fundamental theory of the real line and metric spaces, focusing
on locatedness in normed spaces and with associated results about
operators and their adjoints on a Hilbert space. There are two
appendices to the book. The first gathers together some basic notions
about sets and orders; the second gives the axioms for intuitionistic
logic. The intended readership of the book consists of senior
undergraduate and graduate students, as well as professional research
mathematicians. No background in intuitionistic logic or constructive
analysis is needed in order to read the book, but some familiarity with
the classical theories of metric, normed and Hilbert spaces is
necessary.