Calabi’s Hyperkähler Manifold and Singularity Models of U(3)-Invariant Ricci Flow 

Daoyuan Han, Lehigh University

Abstract: It was proved by Alexander Appleton in 2022 that the Eguchi-Hanson space can occur as a singularity model of Ricci flow in dimension 4. I will present a generalization of this result of occurrence of singularity modeled on the Calabi's hyperkahler space.