vf13/sdvf13

NAME
SYNOPSIS
DESCRIPTION
[sd]vf13 Options
ENVIRONMENT
AUTHORS
NOTES
SEE ALSO

NAME

vf13/sdvf13 − CUTEr interface with the VF13 solver.

SYNOPSIS

[sd]vf13 [−decode] [−s] [−n] [−h] [−k] [−r] [−o 0|1] [−l secs] [−f] [−b] [−a 1|2] [−show] [[−param name=value[,name=value...]] [−force]] [−debug] [−Lpath/to/lib] [−−blas keyword] [−−lapack keyword] [problem[.SIF]]

DESCRIPTION

sdvf13 interfaces the VF13 solver with the CUTEr tools and SIF-encoded problems. sdvf13 applies the SIF decoder to the problem problem.SIF to produce the OUTSDIF.d file and the problem-dependant Fortan subroutines. If problem.SIF has already been decoded, the script vf13 may be run by itself. VF13 minimizes a nonlinear function subject to general equality and inequalities. At each iteration, VF13 attempts to minimize a quadratic approximation to the Lagrangian using linesearches and a watchdog technique in the early iterations.

sdvf13 is only included for backward compatibility with earlier versions of CUTE, and simply calls vf13 with the −decode flag.

vf13 sets the environment and calls runpackage to link all the needed libraries and modules for the VF13 solver to solve the problem decoded from the SIF file and generates the executable.

[sd]vf13 Options

You can start [sd]vf13 with the following options:

−decode

Applies the SIF decoder to the problem problem.SIF to produce the OUTSDIF.d file and the problem-dependant Fortan subroutines. It is redundant to call sdvf13 with the −decode flag.

	−s		Run [sd]vf13 in single-precision mode, if available. Double precision is the default.
	−n		Use the load module if it already exists. Compiling a new load module is the default.
	−h		Print a short help message.
	−k		Keep the generated executable after use. May be useful when solving a particular problem with the same solver with different parameters. Deleting the executable after use is the default.
	−r		Discourage recompilation of the test problem. Default is to recompile object files.

−o 0|1

Regulates the output level of [sd]vf13. Verbose mode is -o 1, silent mode is -o 0. Silent mode is the default.

−l secs

sets a limit of secs second on VF13 runtime. Unlimited cputime is the default.

	−f		Use automatic differentiation in Forward mode
	−b		Use automatic differentiation in Backward mode

−a 1|2

−a 1 uses the older HSL automatic differentiation package AD01 and −a 2 uses the newer HSL automatic differentiation package AD02. −a 2 is the default.

−show

displays possible parameter settings for problem[.SIF]. Other options are ignored.

−param

cast problem[.SIF] against explicit parameter settings. Several parameter settings may be given as a comma-separated list following −param or using several −param flags. Use sifdec -show problem to view possible settings. If a setting is not allowed in the SIF file, no action is taken unless −force is present.

−force

Forces the setting of the parameters named using −param to the given values, even if those values are not predefined in the SIF file.

−Lpath/to/lib

This option is passed directly to the linker and causes the path path/to/lib to be searched for libraries.

−−blas keyword

Overrides usage of the default linpack library packaged with CUTEr. Instead, use the BLAS library specified by keyword. The keyword keyword has one of two forms. The first, -lmyblas causes the linker to search for BLAS subprograms in the libmyblas.a library. The second, none, causes the linker to skip inclusion of any external BLAS. Use the first option if an optimized BLAS library is available on the host system, e.g., the ATLAS BLAS. The second option is useful for packages which already include the necessary BLAS subprograms.

−−lapack keyword

Overrides usage of the default linpack library packaged with CUTEr. Instead, use the LAPACK library specified by keyword. The keyword keyword has one of two forms. The first, -lmylapack causes the linker to search for LAPACK subroutines in the libmylapack.a library. The second, none, causes the linker to skip inclusion of any external LAPACK. Use the first option if an optimized LAPACK library is available on the host system. The second option is useful for packages which already include the necessary LAPACK subprograms.

problem

problem.SIF is the name of the file containing the SIF information on the problem to be solved.

ENVIRONMENT

CUTER

Home directory for CUTEr

MYCUTER

Home directory of the installed CUTEr distribution.

MASTSIF

A pointer to the directory containing the CUTEr problems collection. If this variable is not set, the current directory is searched for problem.SIF. If it is set, the current directory is searched first, and if problem.SIF is not found there, $MASTSIF is searched.

AUTHORS

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

NOTES

VF13 is part of the Harwell Subroutine Library. It is distributed by the United Kingdom Atomic Energy Authority, Harwell, subject to certain license agreements. It is copyrighted jointly by the UKAEA and the Science and Engineering Research Council. VF13 is authored by M.J.D. Powell.