Expanding Soliton Models for Kähler-Ricci Flow Near Conical Singularities

Abstract

Let $(Y,g_0)$ be a compact analytic space with a finite number of singular points, where the metric at each singular point is modelled on a Kähler cone with smooth canonical model. We show that the Kähler-Ricci flow with such initial data satisfies a $C/t$ curvature bound, and that the flow near each singular point is modelled on the unique Kähler-Ricci expander asymptotic to the corresponding cone. Our motivation is to give a geometric description of the Kähler--Ricci flow emerging from singularities arising in the analytic minimal model program.

Streamlined proofs and minor corrections. 35 pages, 2 figures. Comments are welcome!