# /home/coin/svn-release/Alps-1.4.8/Osi/src/Osi/OsiSolverParameters.hpp File Reference

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## Enumerations
enum | OsiIntParam { OsiMaxNumIteration = 0, OsiMaxNumIterationHotStart, OsiNameDiscipline, OsiLastIntParam }
enum | OsiDblParam { OsiDualObjectiveLimit = 0, OsiPrimalObjectiveLimit, OsiDualTolerance, OsiPrimalTolerance, OsiObjOffset, OsiLastDblParam }
enum | OsiStrParam { OsiProbName = 0, OsiSolverName, OsiLastStrParam }
enum | OsiHintParam { OsiDoPresolveInInitial = 0, OsiDoDualInInitial, OsiDoPresolveInResolve, OsiDoDualInResolve, OsiDoScale, OsiDoCrash, OsiDoReducePrint, OsiDoInBranchAndCut, OsiLastHintParam }
enum | OsiHintStrength { OsiHintIgnore = 0, OsiHintTry, OsiHintDo, OsiForceDo }

## Enumeration Type Documentation

enum OsiIntParam

Enumerator:

  OsiMaxNumIteration | Iteration limit for initial solve and resolve. The maximum number of iterations (whatever that means for the given solver) the solver can execute in the OsiSolverinterface::initialSolve() and OsiSolverinterface::resolve() methods before terminating.
  OsiMaxNumIterationHotStart | Iteration limit for hot start. The maximum number of iterations (whatever that means for the given solver) the solver can execute in the OsiSolverinterface::solveFromHotStart() method before terminating.
  OsiNameDiscipline | Handling of row and column names. The name discipline specifies how the solver will handle row and column names: 0: Auto names: Names cannot be set by the client. Names of the form Rnnnnnnn or Cnnnnnnn are generated on demand when a name for a specific row or column is requested; nnnnnnn is derived from the row or column index. Requests for a vector of names return a vector with zero entries. 1: Lazy names: Names supplied by the client are retained. Names of the form Rnnnnnnn or Cnnnnnnn are generated on demand if no name has been supplied by the client. Requests for a vector of names return a vector sized to the largest index of a name supplied by the client; some entries in the vector may be null strings. 2: Full names: Names supplied by the client are retained. Names of the form Rnnnnnnn or Cnnnnnnn are generated on demand if no name has been supplied by the client. Requests for a vector of names return a vector sized to match the constraint system, and all entries will contain either the name specified by the client or a generated name.
  OsiLastIntParam | End marker. Used by OsiSolverInterface to allocate a fixed-sized array to store integer parameters.

Definition at line 8 of file OsiSolverParameters.hpp.

enum OsiDblParam

Enumerator:

  OsiDualObjectiveLimit | Dual objective limit. This is to be used as a termination criteria in algorithms where the dual objective changes monotonically (e.g., dual simplex, volume algorithm).
  OsiPrimalObjectiveLimit | Primal objective limit. This is to be used as a termination criteria in algorithms where the primal objective changes monotonically (e.g., primal simplex)
  OsiDualTolerance | Dual feasibility tolerance. The maximum amount a dual constraint can be violated and still be considered feasible.
  OsiPrimalTolerance | Primal feasibility tolerance. The maximum amount a primal constraint can be violated and still be considered feasible.
  OsiObjOffset | The value of any constant term in the objective function.
  OsiLastDblParam | End marker. Used by OsiSolverInterface to allocate a fixed-sized array to store double parameters.

Definition at line 52 of file OsiSolverParameters.hpp.

enum OsiStrParam

Enumerator:

  OsiProbName | The name of the loaded problem. This is the string specified on the Name card of an mps file.
  OsiSolverName | The name of the solver. This parameter is read-only.
  OsiLastStrParam | End marker. Used by OsiSolverInterface to allocate a fixed-sized array to store string parameters.

Definition at line 88 of file OsiSolverParameters.hpp.

enum OsiHintParam

Enumerator:

  OsiDoPresolveInInitial | Whether to do a presolve in initialSolve.
  OsiDoDualInInitial | Whether to use a dual algorithm in initialSolve. The reverse is to use a primal algorithm
  OsiDoPresolveInResolve | Whether to do a presolve in resolve.
  OsiDoDualInResolve | Whether to use a dual algorithm in resolve. The reverse is to use a primal algorithm
  OsiDoScale | Whether to scale problem.
  OsiDoCrash | Whether to create a non-slack basis (only in initialSolve).
  OsiDoReducePrint | Whether to reduce amount of printout, e.g., for branch and cut.
  OsiDoInBranchAndCut | Whether we are in branch and cut - so can modify behavior.
  OsiLastHintParam | Just a marker, so that OsiSolverInterface can allocate a static sized array to store parameters.

Definition at line 107 of file OsiSolverParameters.hpp.

enum OsiHintStrength

Enumerator:

  OsiHintIgnore | Ignore hint (default).
  OsiHintTry | This means it is only a hint.
  OsiHintDo | This means do hint if at all possible.
  OsiForceDo | And this means throw an exception if not possible.

Definition at line 131 of file OsiSolverParameters.hpp.