What is … a matroid? And how are they related to quantum field theory?

This page hosts information on Markus Hihn's talk "What is … a matroid?" at the "What is …?" seminar. The talk will take place on Friday, July 15, 4pm at HU, RUD 25 1.023.

Abstract

In Quantum Field Theory, the study of periods associated to Feynman graphs is of growing interest. However, some graphs define the same period (if it exists). The question which graph defines the same period is answered by their corresponding cycle matroid. This is an easy construction, but they are also appearing in other topics in Quantum Field Theory: The falsification of Kontsevich conjecture and Feynman Integrals with Tensor Structure.

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