Scippy

SCIP

Solving Constraint Integer Programs

Functions
presol_dualinfer.h File Reference
Public API of SCIP » Plugin API of SCIP » Presolvers

Detailed Description

dual inference presolver

Author
Dieter Weninger

This presolver exploits dual information for primal variable fixings:

  1. The first method is an enhanced dual fixing technique.
  2. The second method does dual bound strengthening on continuous primal variables and applies complementary slackness \((A^T y - c)_i > 0 \Rightarrow x_i = 0\) for fixing primal variables at their lower bound.

Definition in file presol_dualinfer.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 SCIPincludePresolDualinfer (SCIP *scip)