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math.CO2026
Polytopal Bier spheres and nonrealizable central symmetries
Thiago Holleben, Yirong Yang
Bier spheres arise as deleted joins of simplicial complexes with their combinatorial Alexander duals and form one of the largest known families of simplicial spheres. We study cent…
math.CO2026
Symmetric (co)homology polytopes
Torben Donzelmann, Thiago Holleben, Martina Juhnke
Symmetric edge polytopes are a recent and well-studied family of centrally symmetric polytopes arising from graphs. In this paper, we introduce a generalization of this family to a…