Dear all, I'm a PETSc user, solving some matrix equations using GMRES method. The matrix is dense and huge, i.e. 10,000~100,000 unknowns. But I'm only interested in the last six unknowns. Is it possible to accelerate the convergence rate of them, even others are less accuracy.
Thanks. Best, Regards, Zhang Ji, PhD student Beijing Computational Science Research Center Zhongguancun Software Park II, No. 10 Dongbeiwang West Road, Haidian District, Beijing 100193, China
