All finite transitive graphs admit a self-adjoint free semigroupoid algebra
All finite transitive graphs admit a self-adjoint free semigroupoid algebra
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所有有限传递图都承认自伴自由半群代数
DOI:
10.1017/prm.2020.20
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Linden, Christopher
中科院分区:
文献类型:
--
作者:
Dor-On, Adam;Linden, Christopher
In this paper we show that every non-cycle finite transitive directed graph has a Cuntz–Krieger family whose WOT-closed algebra is . This is accomplished through a new construction that reduces this problem to in-degree 2-regular graphs, which is then treated by applying the periodic Road Colouring Theorem of Béal and Perrin. As a consequence we show that finite disjoint unions of finite transitive directed graphs are exactly those finite graphs which admit self-adjoint free semigroupoid algebras.
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