Optimal block accelerated overrelaxation method for a large class of 2-cyclic matricesOptimal block accelerated overrelaxation method for a large class of 2-cyclic matrices Peer-Reviewed Journal Publication Δημοσίευση σε Περιοδικό με Κριτές 2015-10-161989enThe problem of exactly determining the optimal pair of parameters for the block Accelerated Overrelaxation (AOR) method, when it applies to large linear systems with a 2-cyclic coefficient matrix, is considered. Under certain hypotheses, concerning the eigenvalues of the associated block Jacobi iteration matrix, explicit expressions of the optimal parameters and their corresponding spectral radius are obtained. These results extend, and correct, the literature on such applications.http://creativecommons.org/licenses/by/4.0/ International Journal of Computer Mathematics3-427223-242 Papatheodorou, Théodore Saridakis Ioannis Σαριδακης Ιωαννης Taylor & Francis Analysis, Regression Linear regression Regression modeling regression analysis analysis regression linear regression regression modeling Linear Systems