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. Author manuscript; available in PMC: 2015 Oct 1.
Published in final edited form as: Phys Rep. 2014 Oct 1;543(1):1–60. doi: 10.1016/j.physrep.2014.05.001

Figure 13.

Figure 13

A patch of a triangulated membrane depicting the one-ring neighbourhood around a vertex υ. The edge e connects vertices υ and 1, and is shared by the faces f1(e) and f2(e). The normal to the surface at vertex υ is given by N̂υ.