Group gradations on Leavitt path algebras
2020 (English)In: Journal of Algebra and its Applications, ISSN 0219-4988, E-ISSN 1793-6829, Vol. 19, no 09, article id 2050165Article in journal (Refereed) Published
Abstract [en]
Given a directed graph EE and an associative unital ring RR one may define the Leavitt path algebra with coefficients in RR, denoted by LR(E)LR(E). For an arbitrary group GG, LR(E)LR(E) can be viewed as a GG-graded ring. In this paper, we show that LR(E)LR(E) is always nearly epsilon-strongly GG-graded. We also show that if EE is finite, then LR(E)LR(E) is epsilon-strongly GG-graded. We present a new proof of Hazrat’s characterization of strongly Zℤ-graded Leavitt path algebras, when EE is finite. Moreover, if EE is row-finite and has no source, then we show that LR(E)LR(E) is strongly Zℤ-graded if and only if EE has no sink. We also use a result concerning Frobenius epsilon-strongly GG-graded rings, where GG is finite, to obtain criteria which ensure that LR(E)LR(E) is Frobenius over its identity component.
Place, publisher, year, edition, pages
World Scientific Pub Co Pte Lt , 2020. Vol. 19, no 09, article id 2050165
Keywords [en]
s -unital ring, strongly graded ring, epsilon-strongly graded ring, Leavitt path algebra
National Category
Algebra and Logic
Identifiers
URN: urn:nbn:se:hv:diva-23428DOI: 10.1142/s0219498820501650ISI: 000563009600004Scopus ID: 2-s2.0-85071375607OAI: oai:DiVA.org:hv-23428DiVA, id: diva2:1964424
Note
The author has changed the family name frpm Nystedt to Lundström
Corrigendum: Group gradations on Leavitt path algebras, Journal of Algebra and Its Applications, Vol. 23, No. 06, 2492001 (2024) https://doi.org/10.1142/S0219498824920014
2025-06-052025-06-052025-12-22Bibliographically approved