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Osi
0.108.1
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The user hooks should be overridden by the user to provide the problem specific routines for the volume algorithm. More...
#include <OsiTestSolver.hpp>
Inheritance diagram for VOL_user_hooks:Public Member Functions | |
| virtual | ~VOL_user_hooks () |
| virtual int | compute_rc (const VOL_dvector &u, VOL_dvector &rc)=0 |
| compute reduced costs More... | |
| virtual int | solve_subproblem (const VOL_dvector &dual, const VOL_dvector &rc, double &lcost, VOL_dvector &x, VOL_dvector &v, double &pcost)=0 |
| Solve the subproblem for the subgradient step. More... | |
| virtual int | heuristics (const VOL_problem &p, const VOL_dvector &x, double &heur_val)=0 |
| Starting from the primal vector x, run a heuristic to produce an integer solution. More... | |
The user hooks should be overridden by the user to provide the problem specific routines for the volume algorithm.
The user should derive a class ...
for all hooks: return value of -1 means that volume should quit
Definition at line 565 of file OsiTestSolver.hpp.
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inlinevirtual |
Definition at line 567 of file OsiTestSolver.hpp.
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pure virtual |
compute reduced costs
| u | (IN) the dual variables |
| rc | (OUT) the reduced cost with respect to the dual values |
Implemented in OsiTestSolverInterface.
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pure virtual |
Solve the subproblem for the subgradient step.
| dual | (IN) the dual variables |
| rc | (IN) the reduced cost with respect to the dual values |
| lcost | (OUT) the lagrangean cost with respect to the dual values |
| x | (OUT) the primal result of solving the subproblem |
| v | (OUT) b-Ax for the relaxed constraints |
| pcost | (OUT) the primal objective value of x |
Implemented in OsiTestSolverInterface.
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pure virtual |
Starting from the primal vector x, run a heuristic to produce an integer solution.
| x | (IN) the primal vector |
| heur_val | (OUT) the value of the integer solution (return COIN_DBL_MAX here if no feas sol was found |
Implemented in OsiTestSolverInterface.
1.8.5