Generic complete-graph rigidity conjecture for admissible matrix norms

Let XX be either Mn(F){\mathcal{M}}_n({\mathbb{F}}) or Hn(F){\mathcal{H}}_n({\mathbb{F}}), let \|\cdot\| be an admissible norm on XX, and write k=dimXk=\dim X. For a placement pXVp\in X^V, the framework (Km,p)(K_m,p) is called full, well-positioned, and infinitesimally rigid when it has the corresponding properties in (X,)(X,\|\cdot\|). Complete-graph rigidity conjecture. If F=R{\mathbb{F}}={\mathbb{R}}, then there exists pXVp\in X^V such that (Km,p)(K_m,p) is full, well-positioned, and infinitesimally rigid for all m2km\geq 2k; if F=C{\mathbb{F}}={\mathbb{C}}, then there exists such a placement for all m2k1m\geq 2k-1. The conjecture predicts the first values of mm beyond the Maxwell-counting obstructions for complete graphs in admissible matrix spaces; its status is not resolved in the supplied source context.

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Primary source

Derek Kitson and Rupert H. Levene, “Graph rigidity for unitarily invariant matrix norms”, arXiv:1709.08967 (2017).

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