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Iterative methods
BiCG, BiCGstab, CG, CGS, Chebyshev, GMRES, Jacobi, QMR, SOR
Identity, Jacobi
Data structures
User supplied: each iterative method is given in two versions.
  1. The matrix-vector product routine is an external, passed to the iterative routine, and the matrix is assumed to be in common.
  2. The iterative routine uses reverse communication.
The Templates book [2] is available commercially, or for download from Netlib.
Example codes

Victor Eijkhout
Mon Aug 25 17:46:10 PDT 1997