Modified Qhss Iteration Methods For A Class Of Complex Symmetric Linear Systems

We introduce a modified QHSS (MQHSS) iteration method for solving a class of complex symmetric linear systems, and prove that this MQHSS iteration method is convergent under certain conditions. We also consider acceleration of the MQHSS iteration by Krylov subspace methods. Numerical experiments show the good performance of the MQHSS iteration method. (c) 2020 IMACS. Published by Elsevier B.V. All rights reserved.