Results 101 to 110 of about 4,881 (233)
Notes on Number Theory and Discrete MathematicsThe set of Set(n)'s for natural numbers n is constructed. For this set it is proved that it is a commutative semi-group. The conditions for which it is a monoid are given.
Krassimir T. Atanassov
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Unitary posets and amalgamations of pomonoids
, 2014 In 1927, Schreier proved that amalgams of groups are always embeddable in the category of groups. However, this is not true in the category of semigroups, as shown by Kimura.
Al Subaiei, Bana
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Journal of the Australian Mathematical Society. Series A. Pure Mathematics and Statistics, 1992 AbstractThis paper is concerned with a new notion of coherency for monoids. A monoid S is right coherent if the first order theory of right S-sets is coherent; this is equivalent to the property that every finitely generated S-subset of every finitely presented right S-set is finitely presented.
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Quasi-Armendariz rings relative to a monoid
, 2007 For a monoid M, we introduce M-quasi-Armendariz rings which are a generalization of quasi-Armendariz rings, and investigate their properties. The M-quasi-Armendariz condition is a Morita invariant property. The class of M-quasi-Armendariz rings is closed
Hashemi, Ebrahim
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On Almost Everywhere K-Additive Set-Valued Maps
Annales Mathematicae SilesianaeLet X be an Abelian group, Y be a commutative monoid, K ⊂Y be a submonoid and F : X → 2Y \ {∅} be a set-valued map. Under some additional assumptions on ideals ℐ1 in X and ℐ2 in X2, we prove that if F is ℐ2-almost everywhere K-additive, then there ...
Jabłońska Eliza
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On cofree S-spaces and cofree S-flows
Applied General Topology, 2012 Let S-Tych be the category of Tychonoff S-spaces for a topological monoid S. We study the cofree S-spaces and cofree S-flows over topological spaces and we prove that for any topological space X and a topological monoid S, the function space C(S,X) with ...
Behnam Khosravi
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Journal of Algebra, 2004 A monoid \(M\) is said to be an extension of a submonoid \(T\) by a group \(G\) if there is a homomorphism \(\varphi\colon M\to G\) such that \(T=\varphi^{-1}(1)\). Given a monoid \(M\) and a submonoid \(T\), if there is a monoid \(\widehat M\) with a homomorphism \(\theta\colon\widehat M\to M\) such that \(\widehat M\) is an extension of a submonoid \(
Fountain, John +2 more
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, 1994 The generating set of a semiretract of a free monoid is an infix code and a biprefix code. If a free monoid is generated by n elements then any nest of semiretracts contains at most n + 1 distinct ...
Anderson, J.A.
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The join of split graphs whose completely regular endomorphisms form a monoid
Open Mathematics, 2017 In this paper, completely regular endomorphisms of the join of split graphs are investigated. We give conditions under which all completely regular endomorphisms of the join of two split graphs form a monoid.
Hou Hailong, Song Yanhua, Gu Rui
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