UM Math Graduate Students Seminar

Dr. Drew Armstrong
University of Miami

will present

What is ADE?

Friday, September 20, 2013, 2:30pm
Ungar Building Room 402

Abstract: Many deep classification problems in mathematics come down to the following: Find all triples of positive integers p,q,r such that 1/p+1/q+1/r is greater than 1. Exercise: What does this problem have to do with the attached diagram? In this talk I will explain the linear algebra phenomenon that underlies all such classifications. It is mysterious in a good way.

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