ILOG CPLEX 11.0 Parameters Reference Manual > > Alphabetic List of Parameters > Presolve dual setting |
Presolve dual setting |
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C Name
CPX_PARAM_PREDUAL
C++ Name
PreDual
Java Name
PreDual
.NET Name
PreDual
InteractiveOptimizer
preprocessing dual
Identifier
1044
Description
Decides whether CPLEX presolve should pass the primal or dual linear programming problem to the linear programming optimization algorithm. By default, CPLEX chooses automatically.
If this parameter is set to 1 (one), the CPLEX presolve algorithm is applied to the primal problem, but the resulting dual linear program is passed to the optimizer. This is a useful technique for problems with more constraints than variables.
Values
Value |
Meaning |
---|---|
-1 |
Turn off this feature |
0 |
Automatic: let CPLEX choose; default |
1 |
Turn on this feature |
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