Speaker: Bobo Hua (华波波), Fudan University
Date: Fri, Apr 28, 2017
Time: 16:30 - 17:30
Venue: Room 3323
Title: Combinatorial curvature for planar graphs
The combinatorial curvature of a planar graph is defined as the generalized Gaussian curvature of its polygonal surface with a piecewise flat metric. We will show that the total curvature of a planar graph with nonnegative combinatorial curvature, whose faces are isometric to Euclidean regular polygons, is an integral multiple of $1/12$, up to a normalization of $2\pi$.
This is joint work with Yanhui Su.