From the Preface by K. Chandrasekharan: The publication of this collection of papers is
intended as a service to the mathematical community as well as a tribute to the genius of CARL
LUDWIG SIEGEL... In the wide range of his interests in his capacity to uncover to attack and
to subdue problems of great significance and difficulty in his invention of new concepts and
ideas in his technical prowess and in the consummate artistry of his presentation SIEGEL
resembles the classical figures of mathematics. In his combination of arithmetical analytical
algebraical and geometrical methods of investigation and in his unerring instinct for the
conceptual and structural as distinct from the merely technical aspects of any concrete
problem he represents the best type of modern mathematical thought. At once classical and
modern his work has profoundly influenced the mathematical culture of our time... this
publication...will no doubt stimulate generations of scholars to come.Volume IV collects
Siegel´s papers from 1968 to 1975.
