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Certain $*$-semigroups are associated with the universal $C^*$-algebra generated by a partial isometry, which is itself the universal $C^*$-algebra of a $*$-semigroup. A fundamental role for a $*$-structure on a semigroup is emphasized, and…

算子代数 · 数学 2014-06-03 Berndt Brenken

In this paper, we realize C*-algebras of generalized Boolean dynamical systems as partial crossed products. Reciprocally, we give some sufficient conditions for a partial crossed product to be isomorphic to a C*-algebra of a generalized…

算子代数 · 数学 2022-02-07 Gilles G. de Castro , Eun Ji Kang

For a free partial action of a group in a set we realize the associated partial skew group ring as an algebra of functions with finite support over an equivalence relation and we use this result to characterize the ideals in the partial…

环与代数 · 数学 2013-06-18 Viviane M. Beuter , Daniel Gonçalves

Partial actions of discrete abelian groups can be used to construct both groupoid C*-algebras and partial crossed product algebras. In each case there is a natural notion of an analytic subalgebra. We show that for countable subgroups of…

算子代数 · 数学 2007-05-23 Allan P. Donsig , Alan Hopenwasser

Let P be a left LCM semigroup, and $\alpha$ an action of $P$ by endomorphisms of a $C^{*}$-algebra $A$. We study a semigroup crossed product $C^{*}$-algebra in which the action $\alpha$ is implemented by partial isometries. This crossed…

算子代数 · 数学 2022-06-02 Saeid Zahmatkesh

We introduce a method to study C*-algebras possessing an action of the circle group, from the point of view of its internal structure and its K-theory. Under relatively mild conditions our structure Theorem shows that any C*-algebra, where…

funct-an · 数学 2016-08-31 Ruy Exel

A C*-dynamical system is said to have the ideal separation property if every ideal in the corresponding crossed product arises from an invariant ideal in the C*-algebra. In this paper we characterize this property for unital C*-dynamical…

算子代数 · 数学 2019-12-19 Matthew Kennedy , Christopher Schafhauser

The paper presents a construction of the crossed product of a C*-algebra by a semigroup of endomorphisms generated by partial isometries.

算子代数 · 数学 2014-11-27 B. K. Kwasniewski , A. V. Lebedev

We introduce the notion of the partial group algebra with projections and relations and show that this C*-algebra is a partial crossed product. Examples of partial group algebras with projections and relations are the Cuntz-Krieger algebras…

算子代数 · 数学 2018-08-06 Danilo Royer

We associate to each discrete partial dynamical system a universal C*-algebra generated by partial isometries satisfying relations given by a Boolean algebra connected to the discrete partial dynamical system in question. We show that for…

算子代数 · 数学 2007-05-23 Toke Meier Carlsen

The recently developed theory of partial actions of discrete groups on $C^*$-algebras is extended. A related concept of actions of inverse semigroups on $C^*$-algebras is defined, including covariant representations and crossed products.…

funct-an · 数学 2008-02-03 Nandor Sieben

In a recent paper, Pardo and the first named author introduced a class of C*-algebras which which are constructed from an action of a group on a graph. This class was shown to include many C*-algebras of interest, including all Kirchberg…

算子代数 · 数学 2014-06-30 Ruy Exel , Charles Starling

The paper presents a construction of the crossed product of a C*-algebra by a commutative semigroup of bounded positive linear maps generated by partial isometries. In particular, it generalizes Antonevich, Bakhtin, Lebedev's crossed…

算子代数 · 数学 2014-10-10 B. K. Kwasniewski

For an action of a finite group on a C*-algebra, we present some conditions under which properties of the C*-algebra pass to the crossed product or the fixed point algebra. We mostly consider the ideal property, the projection property,…

算子代数 · 数学 2012-08-21 Cornel Pasnicu , N. Christopher Phillips

We introduce algebraic dynamical systems, which consist of an action of a right LCM semigroup by injective endomorphisms of a group. To each algebraic dynamical system we associate a C*-algebra and describe it as a semigroup C*-algebra. As…

算子代数 · 数学 2019-02-08 Nathan Brownlowe , Nadia S. Larsen , Nicolai Stammeier

Cuntz and Li have defined a C*-algebra associated to any integral domain, using generators and relations, and proved that it is simple and purely infinite and that it is stably isomorphic to a crossed product of a commutative C*-algebra. We…

算子代数 · 数学 2011-08-29 S. Kaliszewski , M. Landstad , John Quigg

In this paper, we characterize the C*-Algebra generated by partial isometries.

算子代数 · 数学 2007-12-17 Ilwoo Cho , Palle E. T. Jorgensen

Partial dynamical systems (X,alpha) arise naturally when dealing with commutative C*-dynamical system (A,delta). We associate with every pair (X,alpha), or (A,delta), a covariance C*-algebra C*(X,alpha)=C*(A,delta) which agrees with a…

算子代数 · 数学 2007-05-23 B. K. Kwasniewski

We introduce the notion of continuous orbit equivalence for partial dynamical systems, and give an equivalent characterization in terms of Cartan-isomorphisms for partial C*-crossed products. Both graph C*-algebras and semigroup C*-algebras…

算子代数 · 数学 2016-03-31 Xin Li

This is a book about Partial Actions and Fell Bundles with applications to C*-algebras generated by partial isometries. Here is the table of contents: 1-Introduction, 2-Partial actions, 3-Restriction and globalization, 4-Inverse semigroups,…

算子代数 · 数学 2017-08-30 Ruy Exel
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