Scippy

SCIP

Solving Constraint Integer Programs

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

Detailed Description

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_veclendiving.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_EXPORT SCIP_RETCODE SCIPincludeHeurVeclendiving (SCIP *scip)