AMPL: A Modeling Language for Mathematical Programming

LOQO Directives for AMPL

To set these directives, assign a string specifying their values to the AMPL option loqo_options. For example:
     ampl: option loqo_options 'mindeg dual dense=50 pred_corr=0';


bndpush        initial distance from bounds
bounds         name of MPS BOUNDS section
convex         assert problem is convex
dense          dense window threshold
dual           dual-favored matrix reordering
epsdiag        eps tol diag perturbation
epsnum         eps tol for numerical factorization
epssol         eps tol for forward/backward solve
honor_bnds     honor bounds on variabls
honor_initsol  honor initial guesses
inftol         Feasibility tolerance
inftol2        Feasibility tolerance 2
iterlim        Iteration Limit (ITERLIM)
lp_only        linearize only---don't quadraticize
max            maximize the objective
maximize       maximize the objective
maxit          Iteration Limit (ITERLIM)
min            minimize the objective
mindeg         minimum degree matrix reordering
minimize       minimize the objective
minlocfil      minimum local fill matrix reordering
mps            read an MPS file, stub.mps or stdin
mufactor       mu factor
noreord        no matrix reordering
obj            name of MPS objective row
objno          objective number: 1= first, 0= none
outlev         output level
pred_corr      pred= 0, pred_corr= 1, unset= -1
primal         primal-favored matrix reordering
ranges         name of MPS RANGES section
rhs            name of MPS right-hand side section
sdp            assert problem is an SDP
sigfig         significant digits (agreement in primal and dual objectives)
stablty        mixing factor for matrix reordering
steplen        step length reduction factor
timing         timing destination: 1 = stdout, 2 = stderr, 3 = both
timlim         Time limit
verbose        synonym for outlev
wantsol        solution report without -AMPL: sum of
                1 ==> write .sol file
                2 ==> print primal variable values
                4 ==> print dual variable values
                8 ==> do not print solution message



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LAST MODIFIED 1 FEBRUARY 1998 BY 4er.