Publisher's Synopsis
Excerpt from On Triangulations of the 3-Ball and the Solid Torus
Proof 2 We use the same notation as in Proof 1. Assume A is a triangulation that con tradicts the claim. Observe that A cannot have any interior vertices. Let n fo(a). 8a is a triangulation of 2-sphere and hence satisfies Euler's relation fo(3a) f1(6a) f2(8a) 2.
Also, each edge in 0a is contained in two triangles. Hence f2(3a) 2n 4.
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