On the wreath product of monoids
L. Skornjakov (1982)
Banach Center Publications
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L. Skornjakov (1982)
Banach Center Publications
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U. Knauer, A. Mikhalev (1980)
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W. Huang (1996)
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M. Demlová (1978)
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U. Knauer, P. Normak (1990)
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Nadir Murru, Marco Abrate, Stefano Barbero, Umberto Cerruti (2017)
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We define operations that give the set of all Pythagorean triples a structure of commutative monoid. In particular, we define these operations by using injections between integer triples and 3 × 3 matrices. Firstly, we completely characterize these injections that yield commutative monoids of integer triples. Secondly, we determine commutative monoids of Pythagorean triples characterizing some Pythagorean triple preserving matrices. Moreover, this study offers unexpectedly an original...
S. Margolis, J.E. Pin (1984)
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A.V. Mikhalev, U. Knauer (1974)
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L.E. Renner (1987)
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