Multi-preconditioned GMRES by Tyrone Rees

An extension of GMRES which allows the use of multiple preconditioners. (linear algebra, gmres, preconditioning)

mpgmres(A,b,P,type_in,tol,maxits,x0,varargin)

test_mpgmres.m

lobpcg.m by Andrew Knyazev

LOBPCG solves Hermitian partial generalized eigenproblems using preconditioning, competes with eigs (linear algebra, symmetric, partial)

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Defect Correction Method by Allan Peter Engsig-Karup

Implementation of Defect Correction Method for iteratively solving a linear equation system. (iterative solution, linear system, preconditioning)

DC(A,b,tol,maxit,M1,M2,x0,varargin)