This volume contains three long lecture series by J.L. Colliot-Thelene,
Kazuya Kato and P. Vojta. Their topics are respectively the connection
between algebraic K-theory and the torsion algebraic cycles on an
algebraic variety, a new approach to Iwasawa theory for Hasse-Weil
L-function, and the applications of arithemetic geometry to Diophantine
approximation. They contain many new results at a very advanced level,
but also surveys of the state of the art on the subject with complete,
detailed profs and a lot of background. Hence they can be useful to
readers with very different background and experience. CONTENTS: J.L.
Colliot-Thelene: Cycles algebriques de torsion et K-theorie algebrique.-
K. Kato: Lectures on the approach to Iwasawa theory for Hasse-Weil
L-functions.- P. Vojta: Applications of arithmetic algebraic geometry to
diophantine approximations.