%0 Journal Article %T Grafi iperbolici e loro radici %A Anna Franchetta %J Le Matematiche %D 1990 %I University of Catania %X Aim of this paper is to classify hyperbolic graphs and to work out some properties of their roots in order to give counterexamples to a conjecture by Kac about Schur roots. %U http://www.dmi.unict.it/ojs/index.php/lematematiche/article/view/670