A Reeb sphere theorem in graph theory

03/25/2019
by   Oliver Knill, et al.
0

We prove a Reeb sphere theorem for finite simple graphs. The result bridges two different definitions of spheres in graph theory. We also reformulate Morse conditions in terms of the center manifolds, the level surface graphs f=f(x) in the unit sphere S(x). In the Morse case these graphs are either spheres, the empty graph or the product of two spheres.

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