During the time from June 28-July 1, 1978, representatives of different branches of geometry met in Siegen for discussion of and reports on current problems. In particular, the survey lectures, presented by well known geometers, gave nonspecialists the welcome opportunity to learn about the questions posed, the methods used and the results obtained in different areas of the field of geometry. The research areas represented at the meeting in Siegen are reflected in the list of participants and their contributions: Ranging from geometric convexity and related topics to differential geometry and...

This collection of surveys consists in part of extensions of papers presented at the conferences on convexity at the Technische Universitat Wien (July 1981) and at the Universitat Siegen (July 1982) and in part of articles written at the invitation of the editors. This volume together with the earlier volume Contributions to Geometry edited by Tolke and Wills and published by Birkhauser in 1979 should give a fairly good account of many of the more important facets of convexity and its applications. Besides being an up to date reference work this volume can be used as an advanced treatise on...

From acclaimed historian Garry Wills, author of Lincoln at Gettysburg, a celebrated re-appraisal of the meaning and the source of inspiration of The Declaration of Independence, based on a reading of Jefferson's original draft document.

Inventing America upended decades of thinking about The Declaration of Independence when it was first published in 1978 and remains one of the most influential and important works of scholarship about this founding document. Wills challenged the idea that Jefferson took all his ideas from John Locke. Instead, by focussing on...