#include <CoinPresolveUseless.hpp>
Definition at line 10 of file CoinPresolveUseless.hpp.
◆ useless_constraint_action()
useless_constraint_action::useless_constraint_action |
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nactions, |
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const action * |
actions, |
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const CoinPresolveAction * |
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◆ ~useless_constraint_action()
virtual useless_constraint_action::~useless_constraint_action |
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◆ name()
const char * useless_constraint_action::name |
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A name for debug printing.
It is expected that the name is not stored in the transform itself.
Implements CoinPresolveAction.
◆ presolve()
◆ postsolve()
Apply the postsolve transformation for this particular presolve action.
Implements CoinPresolveAction.
◆ testRedundant()
Scan constraints looking for useless constraints.
A front end to identify useless constraints and hand them to useless_constraint_action::presolve() for processing.
In a bit more detail, the routine implements a greedy algorithm that identifies a set of necessary constraints. A constraint is necessary if it implies a tighter bound on a variable than the original column bound. These tighter column bounds are then used to calculate row activity and identify constraints that are useless given the presence of the necessary constraints.
◆ nactions_
const int useless_constraint_action::nactions_ |
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◆ actions_
const action* const useless_constraint_action::actions_ |
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The documentation for this class was generated from the following file: