This note covers the
following topics: Discrete Curves, Curves and curvature, Flows on curves,
Elastica, Darboux transforms, Discrete Surfaces, Abstract discrete surfaces,
Polyhedral surfaces and piecewise flat surfaces, Discrete cotan Laplace
operator, Delaunay tessellations, Line congruences over simplicial surfaces,
Polyhedral surfaces with parallel Gauss map, Willmore energy.

**Author(s):** Alexander I. Bobenko

144**Pages**