This volume contains the papers selected for presentation at the Thirteenth - nual International Symposium on Algorithms and Computation (ISAAC 2002) tobeheldinVancouver, CanadaonNovember21-23,2002.Thisisthe?rsttime thatISAAChasventuredintoNorthAmerica, asitistraditionallyheldinthe Asia-Paci?c region. ISAAC is an annual international symposium that covers the very broad areas of algorithms and computing in general. The scope of this symposium - cludes both theoretical and applied research from these ?elds. The main aim of the symposium is to promote the exchange of ideas in this active...