Convergence Characteristics of Preconditioned Linear Solvers Based on Minimum Residual for Complex Symmetric Linear Systems

摘要

IC-COCG (Conjugate Orthogonal Conjugate Gradient method with Incomplete Cholesky decomposition) method is widely used to solve complex symmetric systems derived from frequency domain edge-based finite element method. This paper shows the effectiveness of COCR (Conjugate A-Orthogonal Conjugate Residual) and MRTR (Minimized Residual Method based on the Three-term Recurrence formula of CG-type) methods with IC preconditioner.