ILOG CPLEX 11.0 Parameters Reference Manual > > Alphabetic List of Parameters > Barrier algorithm |
Barrier algorithm |
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C Name
CPX_PARAM_BARALG
C++ Name
BarAlg
Java Name
BarAlg
.NET Name
BarAlg
InteractiveOptimizer
barrier algorithm
Identifier
3007
Description
The default setting 0 uses the "infeasibility - estimate start" algorithm (setting 1) when solving subproblems in a MIP problem, and the standard barrier algorithm (setting 3) in other cases. The standard barrier algorithm is almost always fastest. However, on problems that are primal or dual infeasible (common for MIP subproblems), the standard algorithm may not work as well as the alternatives. The two alternative algorithms (settings 1 and 2) may eliminate numerical difficulties related to infeasibility, but are generally slower.
Values
Value |
Meaning |
---|---|
0 |
Default setting |
1 |
Infeasibility-estimate start |
2 |
Infeasibility-constant start |
3 |
Standard barrier |
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