nitsma

nitsma − CUTEr NITSOL test driver

nitsma

The nitsma main program test drives NITSOL on SIF problems from the CUTEr distribution.

NITSOL is a package for the solution of nonlinear systems of equations in which key linear systems are approximately solved using a variety of Krylov-based methods.

NITSOL has been written and is distributed by

Homer F. Walker and Michael Pernice Department of Mathematical Sciences Worcester Polytechnic Institute Worcester, MA 01609-2280, USA E-mail walker@wpi.edu

NITSOL is available from

ftp://ephraim.wpi.edu/pub/nitsol/nitsol.tar.gz

Use the provided Makefile to obtain the library libnitsol.a, and move this into your directory $MYCUTER/precision/lib/. If you are unable to provide machine-tuned BLAS and/or LAPACK routines, use the same Makefile to obtain libblas.a and/or liblapack.a, and move these into $MYCUTER/precision/lib/.

If no NITSOL.SPC file is present in the current directory, the default version is copied from $CUTER/common/src/pkg/nitsol/. Default specifications are as follows:

    200    NNIMAX max number of nonlinear iterations
      1    IJACV  method for J*v eval. (0 => finite diffs, 1 => analytic)
      0    IKRYSL Krylov solver: (0 => GMRES 1 => BiCGSTAB, 2 => TFQMR)
     20    KDMAX  max Krylov subspace dimension when GMRES is used
      0    IRPRE  right preconditioning: (0 => no, 1 => yes)
   1000    IKSMAX max allowable number iterations per call to Krylov solver
      0    IRESUP residual update for GMRES (0 => combination, 1 => direct)
      2    IFDORD order of the finite-difference formula (sometimes) used
     10    IBTMAX maximum allowable number of backtracks per linesearch
      0    IETA   flag determining the forcing term eta (0,1,2,3)
      1    IPLVL  printlevel (0 => nome, => 1 it+f, => 2+ increasing detail)
      6    IPUNIT printout unit number
      0    IPSOL  print solution to output unit (0 => no, 1 => yes)
 1.0D-6    FTOL   stopping tolerance on the f-norm
 1.0D-6    STPTOL stopping tolerance on the steplength

The reader is referred to the paper quoted below and the code itself if he or she wishes to modify these parameters.

CUTER

Parent directory for CUTEr

MYCUTER

Home directory of the installed CUTEr distribution.

I. Bongartz, A.R. Conn, N.I.M. Gould, D. Orban and Ph.L. Toint

CUTEr (and SifDec): A Constrained and Unconstrained Testing Environment, revisited, N.I.M. Gould, D. Orban and Ph.L. Toint, ACM TOMS, 29:4, pp.373-394, 2003.

CUTE: Constrained and Unconstrained Testing Environment, I. Bongartz, A.R. Conn, N.I.M. Gould and Ph.L. Toint, TOMS, 21:1, pp.123-160, 1995.

NITSOL: a Newton iterative solver for nonlinear systems, M. Pernice and H. F. Walker, Special Issue on Iterative Methods, SIAM J. Sci. Comput., 19 (1998), 302--318.

sdnits(1), nits(1).