Published Paper

Inserted: 24 may 2022
Last Updated: 5 jun 2023

Journal: GAFA
Pages: 32
Year: 2022

Abstract:

We solve a conjecture raised by Kapovitch, Lytchak and Petrunin by showing that the metric measure boundary is vanishing on any $RCD(K,N)$ space $(X,d,H^N)$ without boundary. Our result, combined with previous work by Kapovitch-Lytchak-Petrunin, settles an open question about the existence of infinite geodesics on Alexandrov spaces without boundary raised by Perelman and Petrunin in 1996.