Assertion: curvature's curvature | /r/HasProperty | concentrated at point
Facets:
value: useful for polyhedra
type: PURPOSE
Source sentences:
text: The discrete analog of curvature, corresponding to curvature being concentrated at a point and particularly useful for polyhedra, is the (angular) defect; the analog for the Gauss–Bonnet theorem is Descartes' theorem on total angular defect.