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The Euler-Fermat theorem for the semigroup of circulant Boolean matrices. (English) Zbl 0443.20053

MSC:
20M20 Semigroups of transformations, relations, partitions, etc.
15B34 Boolean and Hadamard matrices
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References:
[1] K. K. Hang Butler, Š. Schwarz: The semigroup of circulant Boolean matrices. Czechoslovak Math. J. 26 (101) (1976), 632-635. · Zbl 0347.20037
[2] Š. Schwarz: A counting theorem in the semigroup of circulant Boolean matrices. Czechoslovak Math. J. 27 (102) (1977), 504-510. · Zbl 0382.15010
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