MipPresolve Enumeration
Namespace: Optimizer
Assembly: xprsdn (in xprsdn.dll) Version: 48.01.01+1850ffb5138fca4d234db948cf0432e896c1cf42
[FlagsAttribute] public enum MipPresolve
| Member name | Value | Description |
|---|---|---|
| ReducedCostFixing | 1 | Reduced cost fixing will be performed at each node. This can simplify the node before it is solved, by deducing that certain variables' values can be fixed based on additional bounds imposed on other variables at this node. This bit is deprecated, use NODEREDCOSTTIGHTEN instead. Obsolete |
| LogicPreprossessing | 2 | Primal reductions will be performed at each node. Uses constraints of the node to tighten the range of variables, often resulting in fixing their values. This greatly simplifies the problem and may even determine optimality or infeasibility of the node before the simplex method commences. This bit is deprecated, use NODEAPPLIEDBOUNDS instead. Obsolete |
| AllowChangeBounds | 8 | If node preprocessing is allowed to change bounds on non MIP entities (e.g., continuous) columns. This bit is deprecated, use NODEAPPLIEDBOUNDS instead. Obsolete |
| DualReductions | 16 | Dual reductions will be performed at each node. This bit is deprecated, use NODEDUALREDUCTIONS instead. Obsolete |
| GlobalCoefficientTightening | 32 | Allow global (non-bound) tightening of the problem during the tree search. |
| ObjectiveBasedReductions | 64 | The objective function will be used to find reductions at each node. |
| AllowTreeRestart | 128 | [Unused] This bit is no longer used to control restarts. Refer to the integer control MIPRESTART for disabling tree restarts. Obsolete |
| SymmetryReductions | 256 | Allow that symmetry is used to presolve the node problem. |
Reference
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