Quasi-Baer $ * $ -Ring Characterization of Leavitt Path Algebras

Pub Date : 2024-05-29 DOI:10.1134/s0037446624030145
M. Ahmadi, A. Moussavi
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Abstract

We say that a graded ring (\( * \)-ring) \( R \) is a graded quasi-Baer ring (graded quasi-Baer \( * \)-ring) if, for each graded ideal \( I \) of \( R \), the right annihilator of \( I \) is generated by a homogeneous idempotent (projection). We prove that a Leavitt path algebra is quasi-Baer (quasi-Baer \( * \)) if and only if it is graded quasi-Baer (graded quasi-Baer \( * \)). We show that a Leavitt path algebra is quasi-Baer (quasi-Baer \( * \)) if its zero component is quasi-Baer (quasi-Baer \( * \)). However, we give some example that showing that the converse implication fails. Finally, we characterize the Leavitt path algebras that are quasi-Baer \( * \)-rings in terms of the properties of the underlying graph.

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利维特路径代数的准巴儿 * * -环特性化
我们说,如果对于 \( R \) 的每个分级理想 \( I \) ,\( I \) 的右湮没子是由一个同质偶等(投影)生成的,那么分级环(\( * \)-环)就是一个分级准贝尔环(分级准贝尔 \( * \)-环)。我们证明,当且仅当一个 Leavitt 路径代数是分级准 Baer(graded quasi-Baer \( * \))时,它才是准 Baer(quasi-Baer \( * \))。我们证明,如果一个 Leavitt 路径代数的零成分是准 Baer(quasi-Baer \( * \)),那么这个 Leavitt 路径代数就是准 Baer(quasi-Baer \( * \))。然而,我们给出了一些例子,表明反向蕴涵是失败的。最后,我们从底层图的性质出发,描述了准 Baer \( * \)-环的 Leavitt 路径代数的特征。
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