Results 21 to 30 of about 58,101 (201)
New models for some free algebras of small ranks
Karpatsʹkì Matematičnì Publìkacìï, 2023 Dimonoids, generalized digroups and doppelsemigroups are algebras defined on a set with two binary associative operations. The notion of a dimonoid was introduced by J.-L.
A.V. Zhuchok, G.F. Pilz
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On the joins of semigroup varieties with the variety of commutative semigroups [PDF]
Proceedings of the American Mathematical Society, 1994 We show that the join of a variety of semigroups and the variety of all commutative semigroups is not finitely based, provided some weak conditions.
Sapir, M. V., Volkov, M. V.
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Right derivations on ordered semigroups [PDF]
Journal of Hyperstructures, 2019 Over the last few decades, several authors have investigated the relationship between the commutativity of ring R and the existence of certain specified derivations of R.
M. Murali Krishna Rao
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Commutativity in Double Interchange Semigroups [PDF]
Applied Categorical Structures, 2018 25 pages, 5 figures, 27 references, comments ...
Fatemeh Bagherzadeh, Murray R. Bremner
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Classification and enumeration of finite semigroups [PDF]
, 2010 The classification of finite semigroups is difficult even for small orders because of their large number. Most finite semigroups are nilpotent of nilpotency rank 3.
Distler, Andreas
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On absorption in semigroups and $n$-ary semigroups [PDF]
Logical Methods in Computer Science, 2015 The notion of absorption was developed a few years ago by Barto and Kozik and immediately found many applications, particularly in topics related to the constraint satisfaction problem.
Bojan Bašić
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On commutativity of a semigroup which is a semilattice of commutative semigroups
Journal of Algebra, 1969 Let P,(G) and P,(G) be abstract properties pertaining to commutative semigroups G in the sense of Cohn [3]. P,(G) is said to be weaker than or equal to P,(G) and denoted by P,(G) 3 P,(G) if and only if, for any commutative semigroup S, P,(G) is satisfied by S (i.e., P,(S) is true) whenever P,(G) is satisfied by S.
Yoshida, Reikichi, Yamada, Miyuki
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Unary FA-presentable semigroups [PDF]
, 2012 Automatic presentations, also called FA-presentations, were introduced to extend nite model theory to innite structures whilst retaining the solubility of interesting decision problems.
Cain, Alan James +2 more
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Asymptotic ω-Primality of Finitely Generated Cancelative Commutative Monoids
Mathematics, 2023 The computation of ω-primality has been object of study, mainly, for numerical semigroups due to its multiple applications to the Factorization Theory. However, its asymptotic version is less well known.
Juan Ignacio García-García +2 more
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Varieties of commutative semigroups [PDF]
Transactions of the American Mathematical Society, 1994 In this paper, we describe all equational theories of commutative semigroups in terms of certain well-quasi-orderings on the set of finite sequences of nonnegative integers. This description yields many old and new results on varieties of commutative semigroups.
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