摘要
In this paper we derive a relative volume comparison of Ricci flow under a certain local curvature condition.It is a refinement of Perelman’s no local collapsing theorem in Perelman(2002).
基金
supported by National Natural Science Foundation of China(Grant Nos.11331001 and 11890661)
supported by Beijing Natural Science Foundation(Grant No.Z180004)
National Natural Science Foundation of China(Grant No.11825105)
Ministry of Education of China(Grant No.161001)。
