We propose to study certain groups that are associated with algebraic curves over finite fields. The groups in question can be viewed as the automorphism groups of unramified coverings of a fixed algebraic curve over a finite field which is also fixed throughout the discussion. As we let vary the coverings we obtain a system of groups, which is called the algebraic fundamental group of the curve; this concept was introduced by Grothendieck. The algebraic fundamental group mixes in a fascinating way the arithmetic of the finite field and the geometry of the curve in question. In particular, one can associate to a point on the curve a certain conjugacy class in this group, consisting of the so-called Frobenius elements. The question which we would like to answer is: What is the (relative) position of these Frobenius elements in the group?

The general area of research of the project is Arithmetic Algebraic Geometry. Roughly speaking, the Algebra refers to the fact that we work mainly with polynomials as far as functions are concerned. We define geometric objects byequating to zero a few of these polynomials. Such an object is called an algebraic set or a variety. It turns out that there is a surprisingly rich geometry of these objects, especially if we consider equations in higher dimensions and of higher degree. The arithmetical aspect comes into play when we consider only those polynomials which have integers (or rational numbers) as coefficients. These objects have wide-ranging applications in number theory, geometry, and the theory of data security.

Agency
National Science Foundation (NSF)
Institute
Division of Mathematical Sciences (DMS)
Application #
9970049
Program Officer
B. Brent Gordon
Project Start
Project End
Budget Start
1999-07-01
Budget End
2002-07-31
Support Year
Fiscal Year
1999
Total Cost
$270,000
Indirect Cost
Name
Massachusetts Institute of Technology
Department
Type
DUNS #
City
Cambridge
State
MA
Country
United States
Zip Code
02139