A Note On Measure Theory

the long version

In this book the author aims to give a comprehensive description of modern abstract measure theory, with some indication of its principal applications. The first two volumes are set at an introductory level; they are intended for students with a solid grounding in the concepts of real analysis, but possibly with rather limited detailed knowledge. The emphasis throughout is on the mathematical ideas involved, which in this subject are mostly to be found in the details of the proofs. The intention of the author is that the book should be usable both as a first introduction to the subject and as a reference work. For the sake of the first aim, he tries to limit the ideas of the early volumes to those which are really essential to the development of the basic theorems. For the sake of the second aim, the author tries to express these ideas in their full natural generality, and in particular the author takes care to avoid suggesting any unnecessary restrictions in their applicability. Of course these principles are to to some extent contradictory.