St Petersburg Mathematical Journal · 2006 · 61 citations · 8 references
Natural SciencesMathematicsTopologyConvex AnalysisDifferential TopologyMetric GeometryMetric SpacesCompactness TheoremsExistence Of MinimizersGradient FlowsOpen Mapping Theorem
An open map theorem for metric spaces is proved and some applications are discussed. The result on the existence of gradient flows of semiconcave functions is generalized to a large class of spaces.
8
Differentiation in metric spaces
Alexander Lytchak · St Petersburg Mathematical Journal · 2005 · 49 citations · Full text
The tangent cone of an Aleksandrov space of curvature ≤K
Igor Nikolaev · manuscripta mathematica · 1995 · 38 citations