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- W4287704447 abstract "Circulant matrices over finite fields and over commutative finite chain rings have been of interest due to their nice algebraic structures and wide applications. In many cases, such matrices over rings have a closed connection with diagonal matrices over their extension rings. In this paper, the determinants of diagonal and circulant matrices over commutative finite chain rings $R$ with residue field $mathbb{F}_q$ are studied. The number of $ntimes n$ diagonal matrices over ${R}$ of determinant $a$ is determined for all elements $a$ in $ {R}$ and for all positive integers $n$. Subsequently, the enumeration of nonsingular $ntimes n$ circulant matrices over ${R}$ of determinant $a$ is given for all units $a$ in $ {R}$ and all positive integers $n$ such that $gcd(n,q)=1$. In some cases, the number of singular $ntimes n$ circulant matrices over ${R}$ with a fixed determinant is determined through the link between the rings of circulant matrices and diagonal matrices. As applications, a brief discussion on the determinant of diagonal and circulant matrices over commutative finite principal ideal rings is given. Finally, some open problems and conjectures are posted" @default.
- W4287704447 created "2022-07-26" @default.
- W4287704447 creator A5004408061 @default.
- W4287704447 date "2020-07-28" @default.
- W4287704447 modified "2023-09-28" @default.
- W4287704447 title "Determinants of some Special Matrices over Commutative Finite Chain Rings" @default.
- W4287704447 doi "https://doi.org/10.48550/arxiv.2007.14123" @default.
- W4287704447 hasPublicationYear "2020" @default.
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