Domains of divergence of the USSOR method applied onp-cyclic matrices Domains of divergence of the USSOR method applied onp-cyclic matrices Peer-Reviewed Journal Publication Δημοσίευση σε Περιοδικό με Κριτές 2015-10-161990enUsing a recently derived classical type general functional equation, relating the eigenvalues of a weakly cyclic Jacobi iteration matrix to the eigenvalues of its associated Unsymmetric Successive Overrelaxation (USSOR) iteration matrix, we obtain bounds for the convergence of the USSOR method, when applied to systems with ap-cyclic coefficient matrix. http://creativecommons.org/licenses/by/4.0/Numerische Mathematik157405-412 Saridakis Ioannis Σαριδακης Ιωαννης Springer Verlag Greek mathematics mathematics greek greek mathematics