sherman3.mtx                ! This matrix (and others) from: http://math.nist.gov/MatrixMarket/ or 
NONE                        ! rhs          | http://www.cise.ufl.edu/research/sparse/matrices/index.html
MM                          ! File format: MM (Matrix Market)  HB (Harwell-Boeing).
1                           ! Preconditioner choice 
01000                       ! ITMAX
1.d-5                       ! EPS
