Department of Mathematics,
University of California San Diego
****************************
Algebra Seminar
Max Ehrman
Yale University
Almost prime coordinates in thin Pythagorean triangles
Abstract:
The affine sieve is a technique first developed by Bourgain, Gamburd, and Sarnak in 2006 and later completed by Salehi Golsefidy and Sarnak in 2010 to study almost-primality in a broad class of affine linear actions. The beauty of this is that it gives us effective bounds on the saturation number for thin orbits coming from $GL_n$ - in particular, producing infinitely many $R$-almost primes for some $R$. However, in practice this value of $R$ is often far from optimal. The case of thin Pythagorean triangles has been of particular interest since the outset of the affine sieve, and I will discuss recent progress on improving bounds for the saturation numbers for their hypotenuses and areas using Archimedean sieve theory.
Host: Alireza Salehi Golsefidy
November 14, 2016
2:00 PM
AP&M 7321
****************************