Results 21 to 30 of about 14,642 (224)
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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Nuclearity of semigroup C*-algebras and the connection to amenability [PDF]
, 2012 We study C*-algebras associated with subsemigroups of groups. For a large class of such semigroups including positive cones in quasi-lattice ordered groups and left Ore semigroups, we describe the corresponding semigroup C*-algebras as C*-algebras of ...
Li, Xin
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Square Roots and Continuity in Strictly Linearly Ordered Semigroups on Real Intervals [PDF]
, 2014 In this article we show that the semigroup operation of a strictly linearly ordered semigroup on a real interval is automatically continuous if each element of the semigroup admits a square root.
Glück, Jochen
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Cuntz semigroups of ultraproduct C*-algebras [PDF]
, 2020 We prove that the category of abstract Cuntz semigroups is bicomplete. As a consequence, the category admits products and ultraproducts. We further show that the scaled Cuntz semigroup of the (ultra)product of a family of C*-algebras agrees with the ...
Antoine, Ramon +2 more
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Extensions of ordered semigroups [PDF]
Czechoslovak Mathematical Journal, 1971 The present note summarizes the author's dissertation [2]. Let S and T be ordered semigroups, the latter with a zero element O. Let Σ be an ideal extension of S by T determined by a partial homomorphism ϕ of T*=T/O into S. A partial solution is given to the problem of determining all ways of extending the given orders on S and T* to Σ=S U T*.
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On the K-theory of crossed products by automorphic semigroup actions [PDF]
, 2012 Let P be a semigroup that admits an embedding into a group G. Assume that the embedding satisfies a certain Toeplitz condition and that the Baum-Connes conjecture holds for G.
Cuntz, Joachim +2 more
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Ordered inverse semigroups [PDF]
Transactions of the American Mathematical Society, 1971 In this paper, we consider two questions: one is to characterize the structure of ordered inverse semigroups and the other is to give a condition in order that an inverse semigroup is orderable. The solution of the first question is carried out in terms of three types of mappings.
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On C-ideals and the basis of an ordered semigroup
AIMS Mathematics, 2020 In this paper, we characterize ordered semigroups containing the greatest ideal and give the conditions of the greatest ideal being a C-ideal in an ordered semigroup.
Ze Gu, Xiang-Yun Xie, Jian Tang
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Zappa-Sz\'ep products of semigroups and their C*-algebras [PDF]
, 2014 Zappa-Sz\'ep products of semigroups encompass both the self-similar group actions of Nekrashevych and the quasi-lattice-ordered groups of Nica. We use Li's construction of semigroup $C^*$-algebras to associate a $C^*$-algebra to Zappa-Sz\'ep products and
Brownlowe, Nathan +3 more
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Orders in power semigroups [PDF]
Glasgow Mathematical Journal, 1996 In this paper we consider examples of orders in restricted power semigroups, where for any semigroup Sthe restricted power semigroup is given by with multiplication XY = {xy:x ∈ X, y ∈ Y} for all X, Y ∈ . We use the notion of order introduced by Fountain and Petrich in [2] which first appears in the form used here in [3].
David Easdown, Victoria Gould
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