Initializing help system before first use

delcuts

Purpose
Delete cuts from the problem in the optimizer.
Synopsis
procedure delcuts(keepbasis:boolean, cuttype:integer, interpret:integer,delta:real, cuts:set of integer)
procedure delcuts(keepbasis:boolean, cuttype:integer, interpret:integer, delta:real)
Arguments
keepbasis 
false 
Cuts with non-basic slacks may be deleted
true 
Ensures that the basis will be valid
cuttype 
Integer number for identification of the cut(s)
interpret 
The way in which the cut type is interpreted:
-1 
Delete all cuts
1 
Treat cut types as numbers
2 
Treat cut types as bitmaps (delete cut if any bit matches any bit set in cuttype)
3 
Treat cut types as bitmaps (delete cut if all bits match those set in cuttype)
delta 
Only delete cuts with an absolute slack value greater than delta. To delete all the cuts set this parameter to a very small value ( e.g. -MAX_REAL)
cuts 
Set of cut indices, if not specified all cuts of type cuttype are deleted
Further information
1. This procedure deletes cuts from the problem loaded in the Optimizer. If a cut is ruled out by any of the given criteria it will not be deleted.
2. This routine can only be called from the solver callbacks XPRS_CB_OPTNODE, XPRS_CB_PREINTSOL and XPRS_CB_NODELPSOLVED (see setcallback).
Related topics
addcut, addcuts.
Module
mmxprs

Parent Topic Cut Pool Manager

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