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Product Ranks of the 3 × 3 Determinant and Permanent

Published online by Cambridge University Press:  20 November 2018

Nathan Ilten
Affiliation:
Department of Mathematics, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A156, Canada e-mail: nilten@sfu.ca
Zach Teitler
Affiliation:
Department of Mathematics, Boise State University, 1910 University Drive, Boise, ID 83725-1555, USA e-mail: zteitler@boisestate.edu
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Abstract

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We show that the product rank of the $3\,\times \,3$ determinant ${{\det }_{3}}$ is $5$ , and the product rank of the $3\,\times \,3$ permanent $\text{per}{{\text{m}}_{3}}$ is $4$ . As a corollary, we obtain that the tensor rank of ${{\det }_{3}}$ is $5$ and the tensor rank of $\text{per}{{\text{m}}_{3}}$ is $4$ . We show moreover that the border product rank of $\text{per}{{\text{m}}_{3}}$ is larger than $n$ for any $n\,\ge \,3$ .

Type
Research Article
Copyright
Copyright © Canadian Mathematical Society 2016

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