NAME

       csdp - semidefinite program solver

SYNOPSIS

       csdp <problemfile> <finalsolution> <initialsolution>
       csdp-complement <inputgraph> <outputgraph>
       csdp-graphtoprob <graph> <problemfile>
       csdp-randgraph <rand_graph> <file> <n> <p> [<seed>]
       csdp-theta <graph>

DESCRIPTION

       This  manual page documents briefly the csdp, csdp-complement, csdp-graphtoprob, csdp-randgraph and csdp-
       theta commands.

       csdp -- interface to solve general semi-definite programs
       csdp-complement -- compute the complement of a graph and output it in csdp problem format
       csdp-graphtoprob -- convert graph into csdp problem format file
       csdp-randgraph -- generate a random graph
       csdp-theta -- solves the Lovasz thetha problem

OPTIONS

       A summary of options is included below.  For  a  complete  description,  see  /usr/share/doc/coinor-csdp-
       doc/csdpuser.pdf.

       csdp
              inputproblem in the SDPA sparse format

       problemfile
              is the name of a file containing the SDP problem in SDPA sparse format

       finalsolution
              is the optional name of a file in which to save the final solution

       initialsolution
              is the optional name of a file from which to take the initial solution.

       CSDP  searches for a file named param.csdp in the current directory. If no such file exists, then default
       values for all of CSDP’s parameters are used. If there is a parameter file, then CSDP reads the parameter
       values from this file.  The default parameter values is given below (can be pasted into a file):

       axtol=1.0e-8
       atytol=1.0e-8
       objtol=1.0e-8
       pinftol=1.0e8
       dinftol=1.0e8
       maxiter=100
       minstepfrac=0.90
       maxstepfrac=0.97
       minstepp=1.0e-8
       minstepd=1.0e-8
       usexzgap=1
       tweakgap=0
       affine=0
       printlevel=1
       perturbobj=1
       fastmode=0

       param.csdp file parameter description

       axtol  atytol objtol tolerances for primal feasibility, dual feasibility, and relative duality gap

       pinftol
              dinftol tolerances used in determining primal and dual infeasibility

       maxiter
              plimit the total number of iterations that CSDP may use

       minstepfrac
              maxstepfrac determine how close to the edge of the feasible region CSDP will step. If  the  primal
              or  dual  step  is  shorter  than  minstepp or minstepd, then CSDP declares a line search failure.
              usexzgap If parameter 0, then CSDP will use the objective function  duality  gap  instead  of  the
              tr(XZ) gap

       tweakgap
              if set to 1, and usexzgap is set to 0, then CSDP will attempt to "fix" negative duality gaps.

       affine If  parameter  affine  is set to 1, then CSDP will take only primal–dual affine steps and not make
              use of the barrier term. This can be useful for some problems that do not have feasible  solutions
              that  are  strictly in the interior of the cone of semidefinite ma- trices.  printlevel determines
              how much debugging information is output. Use printlevel=0 for  no  output  and  printlevel=1  for
              normal output.  Higher values of printlevel will generate more debugging output.

       perturbobj
              determines  whether  the objective function will be perturbed to help deal with problems that have
              unbounded optimal solution sets. If per- turbobj is 0, then the objective will not  be  perturbed.
              If  perturbobj=1, then the objective function will be perturbed by a default amount. Larger values
              of perturbobj (e.g. 100.0) increase the size of the perturbation. This can be helpful  in  solving
              some difficult problems.

       fastmode
              determines  whether  or not CSDP will skip certain time consuming operations that slightly improve
              the accuracy of the solutions. If fastmode is set to 1, then CSDP may be somewhat faster, but also
              somewhat less accurate.

SEE ALSO

       dsdp5(1),theta(1)

       The programs are documented fully in the accompanying .pdf  documentation
              which can be found in /usr/share/doc/coinor-csdp-doc if the coinor-csdp-doc package is installed.

AUTHOR

       csdp was written by Brian Borchers et al.

       This manual page was written by Soeren Sonnenburg <sonne@debian.org>, for the Debian project (but may  be
       used by others).

                                                 April  11, 2009                                         CSDP(1)