The infinitesimal rigidity conjecture for centrally symmetric homology spheres

Let Δ\Delta be a centrally symmetric simplicial complex of dimension d13d-1\geq 3. Assume that Δ\Delta is a homology sphere, a connected homology manifold, or a normal pseudomanifold. Then there exists a map p:V(Δ)Rd\mathbf p:V(\Delta)\to \mathbb R^d such that (Δ,p)(\Delta,\mathbf p) is a centrally symmetric framework that is infinitesimally rigid in Rd\mathbb R^d. The infinitesimal rigidity conjecture. Such a realization should exist for every complex in the stated classes. This conjecture would imply the inequality part of the cs lower bound conjecture, but the source notes that links of centrally symmetric complexes are generally not centrally symmetric, obstructing standard inductive arguments.

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Primary source

Steven Klee, Eran Nevo, Isabella Novik and Hailun Zheng, “A lower bound theorem for centrally symmetric simplicial polytopes”, arXiv:1706.03447 (2018).

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