Friday, December 1, 2017 - 13:00
Feynman integrals that are not polylogs
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.