In this paper, we prove that the mean curvature blows up at the same rate as the second fundamental form at the first singular time T of any compact, type-I mean curvature flow. For the mean curvature flow of surfaces, we obtain similar result provided that the Gaussian density is less than two. Our proofs are based on continuous rescaling and the classification of self-shrinkers. We show that all notions of singular sets defined in  coincide for any type-I mean curvature flow, thus generalizing the result of Stone who established that for any mean convex type-I mean curvature flow. We also establish a gap theorem for self-shrinkers.
All Science Journal Classification (ASJC) codes
- Statistics and Probability
- Geometry and Topology
- Statistics, Probability and Uncertainty