This book is based on lecture notes of a seminar of the Deutsche
Mathematiker Vereinigung held by the authors at Oberwolfach from April 2
to 8, 1995. It gives an introduction to the classification theory and
geometry of higher dimensional complex-algebraic varieties, focusing on
the tremendeous developments of the sub- ject in the last 20 years. The
work is in two parts, with each one preceeded by an introduction
describing its contents in detail. Here, it will suffice to simply ex-
plain how the subject matter has been divided. Cum grano salis one might
say that Part 1 (Miyaoka) is more concerned with the algebraic methods
and Part 2 (Peternell) with the more analytic aspects though they have
unavoidable overlaps because there is no clearcut distinction between
the two methods. Specifically, Part 1 treats the deformation theory,
existence and geometry of rational curves via characteristic p, while
Part 2 is principally concerned with vanishing theorems and their
geometric applications. Part I Geometry of Rational Curves on Varieties
Yoichi Miyaoka RIMS Kyoto University 606-01 Kyoto Japan Introduction:
Why Rational Curves? This note is based on a series of lectures given at
the Mathematisches Forschungsin- stitut at Oberwolfach, Germany, as a
part of the DMV seminar "Mori Theory". The construction of minimal
models was discussed by T.