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arXiv · 2505.10501

Determinants of Steiner Distance Hypermatrices

Joshua Cooper·Zhibin Du
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Abstract

Generalizing work from the 1970s on the determinants of distance hypermatrices of trees, we consider the hyperdeterminants of order-$k$ Steiner distance hypermatrices of trees on $n$ vertices. We show that they can be nearly diagonalized as $k$-forms, generalizing a result of Graham-Lovász, implying a tensor version of ``conditional negative definiteness'', providing new proofs of previous results of the authors and Tauscheck, and resolving the conjecture that these hyperdeterminants depend only on $k$ and $n$ -- as Graham-Pollak showed for $k=2$. We conclude with some open questions.

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Joshua Cooper, Zhibin Du. 2025-05-15. Determinants of Steiner Distance Hypermatrices. https://arxiv.org/abs/2505.10501

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