You may have to Search all our reviewed books and magazines, click the sign up button below to create a free account.
View the abstract.
Our overarching goal is to study various types of algebraic difference equations using techniques analogous to the ones used to study D-modules. Concretely, we study actions of discrete groups on algebraic curves and equivariant sheaves for these actions. We focus on understanding the local behavior of equivariant sheaves. We start by recalling basic notions about equivariant sheaves, the analogous notion to a D-module in the discrete situation. We give a definition for the restriction of an equivariant sheaf to the formal neighborhood of a point, in the case of a reduced curve acted on by a group which is virtually the integers. This definition should play the role of the usual notion of re...
View the abstract.
View the abstract.
View the abstract.
View the abstract.
In July 2009 Germany hosted the 50th International Mathematical Olympiad (IMO). For the very first time the number of participating countries exceeded 100, with 104 countries from all continents. Celebrating the 50th anniversary of the IMO provides an ideal opportunity to look back over the past five decades and to review its development to become a worldwide event. This book is a report about the 50th IMO as well as the IMO history. A lot of data about all the 50 IMOs are included. We list the most successful contestants, the results of the 50 Olympiads and the 112 countries that have ever taken part. It is impressive to see that many of the world’s leading research mathematicians were among the most successful IMO participants in their youth. Six of them gave presentations at a special celebration: Bollobás, Gowers, Lovász, Smirnov, Tao and Yoccoz. This book is aimed at students in the IMO age group and all those who have interest in this worldwide leading competition for highschool students.
View the abstract.
View the abstract.