20.11.2025, 16:15
– Campus Golm, Haus 9, Raum 1.22
Forschungsseminar Differentialgeometrie
Codimension 2 transfer of signatures in L theory
Yuetong Luo (Göttingen)
Nikolas Tapia (TU Berlin and WIAS)
Solutions to the Dyson-Schwinger equation can be obtained by inverting the normal ordering operator. This operator is related to Wick polynomials of annihilation and creation operators. In this talk I will focus on Wick polynomials for non-commuting random variables. I will present a shuffle algebra approach to the combinatorics of such polynomials in the free and boolean settings. This is a joint work with K. Ebrahimi-Fard, F. Patras and L. Zambotti.