22.01.2026, 16:15 Uhr
– Raum 1.22, Haus 9
Forschungsseminar Differentialgeometrie
Index theory and spectral flow of Toeplitz operators
Koen van den Dungen (Bonn)
Alexander Strohmaier
I will review some known general expansions of microlocal spectral counting functions of Dirac and Laplace operators. In special cases these relate directly to heat kernel coefficients. I will then explain some differences between expansions for Laplace and Dirac type operators and show that generalized Dirac operators can be characterized amongst Dirac type operators by the vanishing of a certain coefficient appearing in the expansion of the spectral counting function. (Joint work with Liangpan Li)