English

A new formula of the determinant tensor with symmetries

Commutative Algebra 2023-03-15 v1 Rings and Algebras

Abstract

In this paper, we present a new formula of the determinant tensor detndet_n for n×nn \times n matrices. In \cite{kim2023newdet4}, Kim, Ju, and Kim found a new formula of 4×44 \times 4 determinant tensor det4det_4 which is available when the base field is not of characteristic 22. Considering some symmetries in that formula, we found a new formula so that \begin{equation*} \operatorname{Crank}(det_n) \leq \operatorname{rank}(det_n) \leq \frac{n!}{2^{\lfloor(n-2)/2 \rfloor}} \end{equation*} when the base field is not of characteristic 22.

Keywords

Cite

@article{arxiv.2303.07845,
  title  = {A new formula of the determinant tensor with symmetries},
  author = {Jeong-Hoon Ju and Taehyeong Kim and Yeongrak Kim},
  journal= {arXiv preprint arXiv:2303.07845},
  year   = {2023}
}

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13 pages