This second volume of our treatise on commutative algebra deals largely
with three basic topics, which go beyond the more or less classical
material of volume I and are on the whole of a more advanced nature and
a more recent vintage. These topics are: (a) valuation theory; (b)
theory of polynomial and power series rings (including generalizations
to graded rings and modules); (c) local algebra. Because most of these
topics have either their source or their best motivation in algebraic
geom- etry, the algebro-geometric connections and applications of the
purely algebraic material are constantly stressed and abundantly
scattered through- out the exposition. Thus, this volume can be used in
part as an introduc- tion to some basic concepts and the arithmetic
foundations of algebraic geometry. The reader who is not immediately
concerned with geometric applications may omit the algebro-geometric
material in a first reading (see" Instructions to the reader," page
vii), but it is only fair to say that many a reader will find it more
instructive to find out immediately what is the geometric motivation
behind the purely algebraic material of this volume. The first 8
sections of Chapter VI (including § 5bis) deal directly with properties
of places, rather than with those of the valuation associated with a
place. These, therefore, are properties of valuations in which the value
group of the valuation is not involved.