Geodesic
Some (Hopf) algebraic properties of circulant matrices
Algebra and discrete mathematics, Tome 13 (2012) no. 1, pp. 1-17.

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We study some (Hopf) algebraic properties of circulant matrices, inspired by the fact that the algebra of circulant $n\times n$ matrices is isomorphic to the group algebra of the cyclic group with $n$ elements. We introduce also a class of matrices that generalize both circulant and skew circulant matrices, and for which the eigenvalues and eigenvectors can be read directly from their entries.
Keywords: Hopf algebras; (generalized) circulant matrices; Brandt algebras. 
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Helen Albuquerque; Florin Panaite. Some (Hopf) algebraic properties of circulant matrices. Algebra and discrete mathematics, Tome 13 (2012) no. 1, pp. 1-17. http://geodesic.mathdoc.fr/item/ADM_2012_13_1_a1/

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