Initializing help system before first use

TREEPRESOLVE_KEEPBASIS

Description
Determines what to do with the existing basis when re-presolving a node of the branch-and-bound tree.
Type
Integer
Values
0 
The current basis is ignored and the LP relaxation of the presolved problem will be solved from scratch.
1 
Attempt to presolve the current node basis and use it to warm-start the LP solve after the presolve. This can restrict some presolve reductions but should reduce the time for solving the LP relaxation.
2 
Drop the basis during presolve, but attempt to create a valid warm-start basis based on the parent node solution.
Default value
-1
Affects routines
XPRSmipoptimize ( MIPOPTIMIZE).
See also
TREEPRESOLVE.

Parent Topic Control Parameters

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