ILOG CPLEX 11.0 Parameters Reference Manual > > Alphabetic List of Parameters > Relaxed LP presolve switch |
Relaxed LP presolve switch |
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C Name
CPX_PARAM_RELAXPREIND
C++ Name
RelaxPreInd
Java Name
RelaxPreInd
.NET Name
RelaxPreInd
InteractiveOptimizer
preprocessing relax
Identifier
2034
Description
Decides whether LP presolve is applied to the root relaxation in a mixed integer program (MIP). Sometimes additional reductions can be made beyond any MIP presolve reductions that were already done. By default, CPLEX applies presolve to the initial relaxation in order to hasten time to the initial solution.
Values
Value |
Symbol |
Meaning |
---|---|---|
-1 |
Automatic: let CPLEX choose; default | |
0 | CPX_OFF |
Off: do not use presolve on initial relaxation |
1 | CPX_ON |
On: use presolve on initial relaxation |
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