Scippy

GCG

Branch-and-Price & Column Generation for Everyone

heur_mastervecldiving.h File Reference

Detailed Description

master LP diving heuristic that rounds variables with long column vectors

Author
Tobias Achterberg

Diving heuristic: Iteratively fixes some fractional variable and resolves the LP-relaxation, thereby simulating a depth-first-search in the tree. Vectorlength Diving chooses the variable with the smallest ratio of potential objective change and number of affected constraints and fixes it. One-level backtracking is applied: If the LP gets infeasible, the last fixings is undone, and the opposite fixing is tried. If this is infeasible, too, the procedure aborts.

Definition in file heur_mastervecldiving.h.

#include "scip/scip.h"

Go to the source code of this file.

Functions

SCIP_EXPORT SCIP_RETCODE GCGincludeHeurMastervecldiving (SCIP *scip)
 

Function Documentation

◆ GCGincludeHeurMastervecldiving()

SCIP_EXPORT SCIP_RETCODE GCGincludeHeurMastervecldiving ( SCIP *  scip)

creates the mastervecldiving heuristic and includes it in GCG

Definition at line 147 of file heur_mastervecldiving.c.

References GCGincludeDivingHeurMaster(), HEUR_DESC, HEUR_DISPCHAR, HEUR_FREQ, HEUR_FREQOFS, HEUR_MAXDEPTH, HEUR_NAME, and HEUR_PRIORITY.

Referenced by GCGincludeMasterPlugins().