Speaker: 
David Broadhurst
Speaker affiliation: 
Open University
Date: 
Friday, December 1, 2017 - 13:00
Room: 
Seminar Room
Title: 
Feynman integrals that are not polylogs
Abstract: 
In the last 30 years we have gained much knowledge of the polylogarithms that result from many, but not all, Feynman diagrams. In this talk, I consider a set of Feynman integrals that take us beyond polylogs. At first, modular forms occur. In general, there are quadratic relations between integrals, encoded by rational matrices. I shall not assume familiarity with such structures, but will sketch how concrete Feynman integrals continue to inform mathematics.