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We describe the Jacobson topology of the primitive ideal space of self-similar k-graph C*-algebras under certain conditions.

Operator Algebras · Mathematics 2020-06-26 Hui Li

For an integral domain $R$ satisfying certain condition, we characterize the primitive ideal space and its Jacobson topology of the semigroup crossed product $C^*(R_+) \rtimes R^\times$. The main example is when $R=\mathbb{Z}[\sqrt{-3}]$.

Operator Algebras · Mathematics 2024-08-20 Xiaohui Chen , Hui Li

Radial representations of finitely generated free groups are studied. The associated C*-algebra is located between the reduced and full group C*-algebras and its primitive ideal space is described concretely as a topological space.

Operator Algebras · Mathematics 2025-11-26 Shigeru Yamagami

We introduce primitive hyperideals of a hyperring R and show relations with R itself, and with maximal and prime hyperideals of R. We endow a Jacobson topology on the set of primitive hyperideals of R and study topological properties of the…

Rings and Algebras · Mathematics 2023-01-02 Bijan Davvaz , Amartya Goswami , Karin-Therese Howell

The purpose of this note is to introduce primitive ideals of noncommutative semigroups and study some topological aspects of the corresponding structure spaces.

Group Theory · Mathematics 2022-09-27 Amartya Goswami

We describe primitive and prime ideals in the C*-algebra C*(E) of a graph E satisfying Condition (K), together with the topologies on each of these spaces. In particular, we find that primitive ideals correspond to the set of maximal tails…

Operator Algebras · Mathematics 2014-06-17 Gene Abrams , Mark Tomforde

For any countable directed graph E we describe the primitive ideal space of the corresponding generalized Cuntz-Krieger algebra C*(E).

Operator Algebras · Mathematics 2007-05-23 Jeong Hee Hong , Wojciech Szymanski

Consider the Deaconu-Renault groupoid of an action of a finitely generated free abelian monoid by local homeomorphisms of a locally compact Hausdorff space. We catalogue the primitive ideals of the associated groupoid C*-algebra. For a…

Operator Algebras · Mathematics 2015-01-13 Aidan Sims , Dana P. Williams

We investigate the ideal structures of the C^*-algebras arising from topological graphs. We give the complete description of ideals of such C^*-algebras which are invariant under the so-called gauge action, and give the condition on…

Operator Algebras · Mathematics 2007-05-23 Takeshi Katsura

In this paper we introduce primigraph spaces, which are topological spaces together with a sheaf of $C^*$-algebras that can be covered by some Prim A's, that is, by the primitive spectra of some $C^*$-algebras endowed with Jacobson topology…

Operator Algebras · Mathematics 2020-05-18 Manuel Norman

In this paper, we describe primitive ideal space of the $C^*$-algebra $C^*(\Lambda)$ associated to any locally convex row-finite $k$-graph $\Lambda$. To do this, we will apply the Farthing's desourcifying method on a recent result of…

Operator Algebras · Mathematics 2018-09-06 Hossein Larki

We describe the primitive ideal space of the $C^{\ast}$-algebra of a row-finite $k$-graph with no sources when every ideal is gauge invariant. We characterize which spectral spaces can occur, and compute the primitive ideal space of two…

Operator Algebras · Mathematics 2012-07-31 Sooran Kang , David Pask

Let $(A,\alpha)$ be a system consisting of a $C^*$-algebra $A$ and an automorphism $\alpha$ of $A$. We describe the primitive ideal space of the partial-isometric crossed product $A\times_{\alpha}^{\textrm{piso}}\mathbb{N}$ of the system by…

Operator Algebras · Mathematics 2017-01-17 Wicharn Lewkeeratiyutkul , Saeid Zahmatkesh

Given an affine algebraic variety V and a quantization A of its coordinate ring, it is conjectured that the primitive ideal space of A can be expressed as a topological quotient of V. Evidence in favor of this conjecture is discussed, and…

Quantum Algebra · Mathematics 2007-05-23 K. R. Goodearl

Given a directed graph $E$ and a labeling $\mathcal{L}$, one forms the labelled graph $C^*$-algebra by taking a weakly left--resolving labelled space $(E, \mathcal{L}, \mathcal{B})$ and considering a universal generating family of partial…

Operator Algebras · Mathematics 2019-07-16 Menassie Ephrem

We classify the primitive ideals of generalized down-up algebras

Rings and Algebras · Mathematics 2010-03-12 Iwan Praton

We study the topology of the primitive ideal space of groupoid C*-algebras for groupoids with abelian isotropy. Our results include the known results for action groupoids with abelian stabilizers. Furthermore, we obtain complete results…

Operator Algebras · Mathematics 2021-08-26 Daniel W. van Wyk , Dana P. Williams

In 2004, Hong and Szymanski gave a complete description of the primitive-ideal space of the C*-algebra of a directed graph. This article details a slightly different approach, in the simpler context of row-finite graphs with no sources,…

Operator Algebras · Mathematics 2019-05-06 Toke Meier Carlsen , Aidan Sims

We give necessary and sufficient conditions which a graph should satisfy in order for its associated $C^\ast$-algebra to have a $T_1$ primitive ideal space. We give a description of which one-point sets in such a primitive ideal space are…

Operator Algebras · Mathematics 2013-02-18 James Gabe

A pure topological characterization of primitive ideal spaces of separable nuclear C*-algebras is given. We show that a $T_0$-space $X$ is a primitive ideal space of a separable nuclear C*-algebra $A$ if and only if $X$ is point-complete…

Operator Algebras · Mathematics 2024-01-12 Hergen Harnisch , Eberhard Kirchberg
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