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cplexAPI (version 1.4.0)

basicPresolveCPLEX: Perform Bound Strengthening and Detect Redundant Rows

Description

Low level interface function to the IBM ILOG CPLEX function CPXbasicpresolve. Consult the IBM ILOG CPLEX documentation for more detailed information.

Usage

basicPresolveCPLEX(env, lp)

Arguments

env

An object of class "'>cplexPtr" as returned by openEnvCPLEX. This is basically a pointer to an IBM ILOG CPLEX environment.

lp

An object of class "'>cplexPtr" as returned by initProbCPLEX. This is basically a pointer to an IBM ILOG CPLEX problem object.

Value

If successfull, a list will be returned:

redlb

strengthened lower bounds

redub

strengthened upper bounds

rstat

status of the row

Otherwise an object of class "'>cplexError".

Details

Interface to the C function basicPresolve which calls the CPLEX function CPXbasicpresolve.

References

The IBM ILOG CPLEX home page at https://www.ibm.com/support/knowledgecenter/SSSA5P.