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math.CO2013
A finite chiral 4-polytope in
Javier Bracho, Isabel Hubard, Daniel Pellicer
In this paper, we give an example of a chiral 4-polytope in projective 3-space. This example naturally yields a finite chiral 4-polytope in Euclidean 4-space, giving a counterexamp…
math.CO2013
A characterization of triangulations of closed surfaces
Jorge Arocha, Javier Bracho, Natalia Garcia-Colin +1
In this paper we prove that a finite triangulation of a connected closed surface is completely determined by its intersection matrix. The \emph{intersection matrix} of a finite tri…