Lorenz will give a talk on the recent paper 2109.15251, entitled "Meromorphic modular forms and the three-loop equal-mass banana integral". The abstract for the talk is the following:

Abstract: The paper deals with the master integrals of 3-loop banana integrals, which are related to the periods of K3 manifolds. A certain class of master integrals is identified which is expressible purely in terms of iterated integrals of holomorphic quasi-modular forms. Moreover, a basis for these functions is given and some examples are worked out.