Scippy

SCIP

Solving Constraint Integer Programs

Functions
heur_guideddiving.h File Reference
Public API of SCIP » Plugin API of SCIP » Primal Heuristics

Detailed Description

LP diving heuristic that chooses fixings in direction of incumbent solutions.

Author
Tobias Achterberg

Diving heuristic: Iteratively fixes some fractional variable and resolves the LP-relaxation, thereby simulating a depth-first-search in the tree. Guided Diving chooses the fractional variable which is closest to that variable's value in the incumbent solution and rounds it to the incumbent's value. One-level backtracking is applied: If the LP gets infeasible, the last fixing is undone, and the opposite fixing is tried. If this is infeasible, too, the procedure aborts.

Definition in file heur_guideddiving.h.

#include "scip/def.h"
#include "scip/type_retcode.h"
#include "scip/type_scip.h"

Go to the source code of this file.

Functions

SCIP_RETCODE SCIPincludeHeurGuideddiving (SCIP *scip)