Solve the system.
Solve the system. Details on LGMRES may be found in A. H. Baker, E.R. Jessup, and T.A. Manteuffel, "A technique for accelerating the convergence of restarted GMRES." SIAM Journal on Matrix Analysis and Applications, 26 (2005), pp. 962-984. LGMRES(m,k) in the paper corresponds to LGMRES(Kdim+AugDim, AugDim).