Revista Matemática Iberoamericana
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The center of a Leavitt path algebraGonzalo Aranda Pino and Kathi Crow (1) Departamento de Algebra, Geometría y Topología, Universidad de Málaga, 29071, MÁLAGA, SPAIN
(2) Department of Mathematics, Salem State University, MA 01970, SALEM, UNITED STATES
In this paper the center of a Leavitt path algebra is computed for a wide range of situations. A basis as a $K$-vector space is found for $Z(L(E))$ when $L(E)$ enjoys some finiteness condition such as being artinian, semisimple, noetherian and locally noetherian. The main result of the paper states that a simple Leavitt path algebra $L(E)$ is central (i.e. the center reduces to the base field $K$) when $L(E)$ is unital and has zero center otherwise. Finally, this result is extended, under some mild conditions, to the case of exchange Leavitt path algebras.
Keywords: Leavitt path algebra, graph algebra, center
Aranda Pino Gonzalo, Crow Kathi: The center of a Leavitt path algebra. Rev. Mat. Iberoamericana 27 (2011), 621-644. doi: 10.4171/RMI/649