ILOG CPLEX 11.0 Parameters Reference Manual > > Alphabetic List of Parameters > Relaxed LP presolve switch

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  
CPX_OFF  
Off: do not use presolve on initial relaxation  
CPX_ON 
On: use presolve on initial relaxation