Submonoids of integer group determinants
Abstract
For a finite group $$$G$$$, let $$$S(G)$$$ denote the set of all integer values obtained from the group determinant by substituting integers for its variables. Such values are called integer group determinants. Giving a complete description of $$$S(G)$$$ is a difficult problem, known as the Taussky-Todd integer group determinant problem.
In this paper, we introduce a submonoid $$$S'(G)$$$ of the monoid $$$S(G)$$$ arising from a specific specialization of the group determinant, and provide a framework for investigating certain aspects of the lower structure of $$$S(G)$$$. For finite groups $$$G$$$ of order at most $$$5$$$, we determine $$$S'(G)$$$ explicitly and present concrete examples of integer group determinants.
The motivation for considering the submonoid $$$S'(G)$$$ is that specialization patterns can retain meaningful arithmetic information. In particular, this viewpoint may be useful in contexts related to classical number-theoretic problems, such as the search for Wieferich primes.
Keywords
MSC 2020
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DOI: https://doi.org/10.15421/242612
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