The ordered K_0-group of a graph C*-algebra
arXiv:math/0204095
Abstract
We calculate the ordered K_0-group of a graph C*-algebra and mention applications of this result to AF-algebras, states on the K_0-group of a graph algebra, and tracial states of graph algebras.
6 pages, uses XY-pic. An error in Theorem 2.2 was corrected. At the referee's suggestion the paper was shortened and the title changed