## Analytic and Additive Number Theory

Math 8440

Textbook:      There is no textbook for the course, but here are some recommended books. I will post notes and links to the various topics.
•    M. Nathanson: The classical bases I.
•    R. C. Vaughan: The Hardy-Littlewood method

Description:  The aim of the course is to give an introduction to the Hardy-Littlewood circle method of exponential sums, and also the more recent Goldston-Yildirim-Pintz sieve.
We will discuss various classical and more recent applications.  Topics may include but may not be limited to
• The number of representations as sums of squares.
• The distribution of lattice points on spheres.
• Geometric Ramsey theory on Z^d.
• Integer solutions of  diophantine equations.
• Correlation properties of the almost primes.
• Almost prime solutions of diophantine equations.

### We introduce the circle method and apply it to calculate the asymptotic number and distribution of integer points on spheres.

Notes                                                                                                       Supplementary Notes and Papers                                                                                                    Problems and Projects

II. Distance sets of large sets in R^d and Z^d.

We apply the structural information about the Fourier transform of integer points on spheres prove a discrete analogue of the Katznelson-Weiss theorem on the distance sets of large sets in Euclidean spaces.
This may be viewed as a result in geometric Ramsey theory, where one studies geometric configuration is sets of positive upper density.

Notes                                                                                                    Supplementary Notes and Papers                                                                                                      Problems and Projects

Distance sets 1                                                                                      A Szemerédi type theorem for sets of positive density in R^k

Distance sets 2                                                                                      On distance sets of large sets of integer points
k-point configurations in sets of positive density of Z^n
Distance sets 3

III. Diophantine equations

Notes                                                                                                     Supplementary Notes and Papers

Diophantine equations I                                                                         Davenport: Geometry of numbers

Diophantine equations II

Diophantine equations III

IVSieve Methods

Notes                                                                                                    Supplementary Notes and Papers

Green-Tao: Correlation estimates for sieve weights