On Subdivision Posets of Cyclic Polytopes

Details On Subdivision Posets of Cyclic Polytopes On Subdivision Posets of Cyclic Polytopes

1997-04-08

arxiv.org/abs/math/9704217v1

Mathematics

Combinatorics

Scientific paper

There are two related poset structures, the higher Stasheff-Tamari orders, on the set of all triangulations of the cyclic $d$ polytope with $n$ vertices. In this paper it is shown that both of them have the homotopy type of a sphere of dimension $n-d-3$. Moreover, we resolve positively a new special case of the \emph{Generalized Baues Problem}: The Baues poset of all polytopal decompositions of a cyclic polytope of dimension $d \leq 3$ has the homotopy type of a sphere of dimension $n-d-2$.

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