کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8905183 | 1633782 | 2017 | 84 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Self-similar graphs, a unified treatment of Katsura and Nekrashevych C*-algebras
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موضوعات مرتبط
مهندسی و علوم پایه
ریاضیات
ریاضیات (عمومی)
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چکیده انگلیسی
Given a graph E, an action of a group G on E, and a G-valued cocycle Ï on the edges of E, we define a C*-algebra denoted OG,E, which is shown to be isomorphic to the tight C*-algebra associated to a certain inverse semigroup SG,E built naturally from the triple (G,E,Ï). As a tight C*-algebra, OG,E is also isomorphic to the full C*-algebra of a naturally occurring groupoid Gtight(SG,E). We then study the relationship between properties of the action, of the groupoid and of the C*-algebra, with an emphasis on situations in which OG,E is a Kirchberg algebra. Our main applications are to Katsura algebras and to certain algebras constructed by Nekrashevych from self-similar groups. These two classes of C*-algebras are shown to be special cases of our OG,E, and many of their known properties are shown to follow from our general theory.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Advances in Mathematics - Volume 306, 14 January 2017, Pages 1046-1129
Journal: Advances in Mathematics - Volume 306, 14 January 2017, Pages 1046-1129
نویسندگان
Ruy Exel, Enrique Pardo,