Markus Hihn (HU Berlin)

2011/07/15, 16:00

HU Berlin, at RUD 25 room 1.023

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.