BCP_lp_par Struct Reference

Parameters used in the LP process. More...

#include <BCP_lp_param.hpp>

Inheritance diagram for BCP_lp_par:

Inheritance graph
[legend]
List of all members.

Public Types

 BranchOnCuts
 If true, BCP supports branching on cuts by providing potential branching candidates for the user.
 CompareNewCutsToOldOnes
 If true then the LP process will check each newly received cut whether it already exists in the local cut pool or not.
 CompareNewVarsToOldOnes
 If true then the LP process will check each newly arrived variable whether it already exists in the local variable pool or not.
 DoReducedCostFixingAtZero
 If true the BCP will attempt to do reduced cost fixing only for variables currently at zero.
 DoReducedCostFixingAtAnything
 If true the BCP will attempt to do reduced cost fixing for any variable, no matter what is their current value.
 MaintainIndexedVarPricingList
 Indicate whether BCP is supposed to track the indexed variables yet to be priced out.
 MessagePassingIsSerial
 Indicates whether message passing is serial (all processes are on the same processor) or not.
 ReportWhenDefaultIsExecuted
 Print out a message when the default version of an overridable method is executed.
 SendFathomedNodeDesc
 Whether to send back the description of fathomed search tree nodes to the Tree Manager.
 NoCompressionAtFathom
 Whether we should refrain from compressing the problem description right before a fathomed node's description is sent back to the tree manager.
 end_of_chr_params
 NiceLevel
 What should be the "niceness" of the LP process.
 ScaleMatrix
 Indicates how matrix scaling should be performed.
 IndexedToPriceStorageSize
 Indicates the number of entries stored in a BCP_indexed_pricing_list.
 SlackCutDiscardingStrategy
 The slack cut discarding strategy used in the default version of the function purge_slack_pool().
 CutEffectiveCountBeforePool
 A cut has to remain effective through this many iterations in the LP before it is sent to the Cut Pool process.
 CutPoolCheckFrequency
 The Cut Pool is queried for violated valid inequalities after the first LP relaxation is solved and then after every this many iterations.
 VarPoolCheckFrequency
 The Variable Pool is queried for columns that improve the formulation after the first LP realxation is solved, and then after every this many iterations.
 IneffectiveConstraints
 Indicates which constraints should be considered ineffective.
 IneffectiveBeforeDelete
 How many times in a row a constraint must be found ineffective before it is marked for deletion.
 MaxNonDualFeasToAdd_Min
 The number of non dual-feasible colums that can be added at a time to the formulation is a certain fraction (MaxNonDualFeasToAdd_Frac) of the number of columns in the current formulation.
 MaxNonDualFeasToAdd_Max
 See the description of the previous parameter.
 MaxIndexedToPriceToAdd_Min
 When the tableau is total dual feasible some of variables from the list of the not yet fixed indexed variables are added to the formulation so that the list can be shorter in the descendant nodes (or may become empty).
 MaxIndexedToPriceToAdd_Max
 See the description of the previous parameter.
 CutViolationNorm
 How cut violation should be computed.
 MaxCutsAddedPerIteration
 The maximum number of violated valid inequalities that can be added per iteration.
 MaxVarsAddedPerIteration
 The maximum number of variables that can be added per iteration.
 MaxLeftoverCutNum
 The maximum number of violated but not added cuts to be kept from one iteration to the next.
 DeletedColToCompress_Min
 The number of columns that must be marked for deletion before matrix compression can occur.
 DeletedRowToCompress_Min
 The number of rows that must be marked for deletion before matrix compression can occur.
 MaxPresolveIter
 Upper limit on the number of iterations performed in each of the children of the search tree node when presolving branching candidates.
 StrongBranch_CloseToHalfNum
 Specifies how many branching variables with values close to half between two integers should be chosen by the built-in branching variable selection routine select_branching_candidates() (if this routine is used at all).
 StrongBranch_CloseToOneNum
 Specifies how many branching variables with values close to an integer should be chosen by the built-in branching variable selection routine select_branching_candidates() (if this routine is used at all).
 BranchingObjectComparison
 Specifies the rule used for built-in branching object comparison (if the buit-in routine is used at all).
 ChildPreference
 Specifies the rule used for selecting one of the children of the search tree node for diving.
 FeasibilityTest
 Specifies which built-in MIP feasibility testing routine should be invoked (if a buit-in routine is used at all).
 InfoForCG
 Indicates what part of the primal solution is sent to the Cut Generator process if the BCP_lp_user::pack_primal_solution() method is not overridden.
 InfoForVG
 Indicates what part of the dual solution is sent to the Variable Generator process if the BCP_lp_user::pack_dual_solution() method is not overridden.
 end_of_int_params
 Granularity
 The minimum difference between the objective value of any two feasible solution (with different objective values).
 DeletedColToCompress_Frac
 The fraction of columns that must be marked for deletion before matrix compression can occur.
 DeletedRowToCompress_Frac
 The fraction of rows that must be marked for deletion before matrix compression can occur.
 MaxNonDualFeasToAdd_Frac
 The number of non dual-feasible colums that can be added to the formulation at a time cannot exceed this fraction of the the number of columns in the curent formulation.
 MaxIndexedToPriceToAdd_Frac
 When the tableau is total dual feasible and variables from the list of the not yet fixed indexed variables are added to the formulation, the number of such columns is limited to this fraction of the columns currently in the formulation.
 MaxLeftoverCutFrac
 The maximum fraction of the violated but not added cuts to be kept from one iteration to the next.
 IntegerTolerance
 Values not further from an integer value than the value of this parameter are considered to be integer.
 FirstLP_FirstCutTimeout
 This and the following three parameters control how long the LP process waits for generated cuts.
 LaterLP_FirstCutTimeout
 This parameter specifies the time to wait for the first generated cut at iterations that are not the first at a search tree node.
 FirstLP_AllCutsTimeout
 This parameter specifies the time to wait for cuts at the first LP relaxation at a search tree node.
 LaterLP_AllCutsTimeout
 This parameter specifies the time to wait for cuts at iterations that are not the first at a search tree node.
 FirstLP_FirstVarTimeout
 This and the following three parameters control how long the LP process waits for generated variables.
 LaterLP_FirstVarTimeout
 This parameter specifies the time to wait for the first generated variable at iterations that are not the first at a search tree node.
 FirstLP_AllVarsTimeout
 This parameter specifies the time to wait for variables at the first LP relaxation at a search tree node.
 LaterLP_AllVarsTimeout
 This parameter specifies the time to wait for variables at iterations that are not the first at a search tree node.
 end_of_dbl_params
 LogFileName
 The filename all the output should go to.
 end_of_str_params
 str_array_dummy
 end_of_str_array_params
enum  chr_params {
  BranchOnCuts, CompareNewCutsToOldOnes, CompareNewVarsToOldOnes, DoReducedCostFixingAtZero,
  DoReducedCostFixingAtAnything, MaintainIndexedVarPricingList, MessagePassingIsSerial, ReportWhenDefaultIsExecuted,
  SendFathomedNodeDesc, NoCompressionAtFathom, LpVerb_First, LpVerb_AddedCutCount,
  LpVerb_AddedVarCount, LpVerb_ChildrenInfo, LpVerb_ColumnGenerationInfo, LpVerb_CutsToCutPoolCount,
  LpVerb_VarsToVarPoolCount, LpVerb_FathomInfo, LpVerb_IterationCount, LpVerb_RelaxedSolution,
  LpVerb_FinalRelaxedSolution, LpVerb_LpMatrixSize, LpVerb_LpSolutionValue, LpVerb_MatrixCompression,
  LpVerb_NodeTime, LpVerb_PresolvePositions, LpVerb_PresolveResult, LpVerb_ProcessedNodeIndex,
  LpVerb_ReportCutGenTimeout, LpVerb_ReportVarGenTimeout, LpVerb_ReportLocalCutPoolSize, LpVerb_ReportLocalVarPoolSize,
  LpVerb_RepricingResult, LpVerb_VarTightening, LpVerb_RowEffectivenessCount, LpVerb_StrongBranchPositions,
  LpVerb_StrongBranchResult, LpVerb_GeneratedCutCount, LpVerb_GeneratedVarCount, LpVerb_Last,
  end_of_chr_params
}
 Character parameters. More...
enum  int_params {
  NiceLevel, ScaleMatrix, IndexedToPriceStorageSize, SlackCutDiscardingStrategy,
  CutEffectiveCountBeforePool, CutPoolCheckFrequency, VarPoolCheckFrequency, IneffectiveConstraints,
  IneffectiveBeforeDelete, MaxNonDualFeasToAdd_Min, MaxNonDualFeasToAdd_Max, MaxIndexedToPriceToAdd_Min,
  MaxIndexedToPriceToAdd_Max, CutViolationNorm, MaxCutsAddedPerIteration, MaxVarsAddedPerIteration,
  MaxLeftoverCutNum, DeletedColToCompress_Min, DeletedRowToCompress_Min, MaxPresolveIter,
  StrongBranch_CloseToHalfNum, StrongBranch_CloseToOneNum, BranchingObjectComparison, ChildPreference,
  FeasibilityTest, InfoForCG, InfoForVG, end_of_int_params
}
 Integer parameters. More...
enum  dbl_params {
  Granularity, DeletedColToCompress_Frac, DeletedRowToCompress_Frac, MaxNonDualFeasToAdd_Frac,
  MaxIndexedToPriceToAdd_Frac, MaxLeftoverCutFrac, IntegerTolerance, FirstLP_FirstCutTimeout,
  LaterLP_FirstCutTimeout, FirstLP_AllCutsTimeout, LaterLP_AllCutsTimeout, FirstLP_FirstVarTimeout,
  LaterLP_FirstVarTimeout, FirstLP_AllVarsTimeout, LaterLP_AllVarsTimeout, end_of_dbl_params
}
 Double parameters. More...
enum  str_params { LogFileName, end_of_str_params }
 String parameters. More...
enum  str_array_params { str_array_dummy, end_of_str_array_params }
 There are no string array parameters. More...
Verbosity Parameters.
These are all true/false parameters; if the parameter value is set then the corresponding information is printed.


Detailed Description

Parameters used in the LP process.

These parameters can be set in the original parameter file by including the following line:
BCP_{parameter name} {parameter value}.

Definition at line 14 of file BCP_lp_param.hpp.


Member Enumeration Documentation

enum BCP_lp_par::chr_params

Character parameters.

All of these variables are used as booleans (true = 1, false = 0).

Enumerator:
BranchOnCuts  If true, BCP supports branching on cuts by providing potential branching candidates for the user.

These are cuts that were added to the formulation at some point but became slack later in subsequent LP relaxations.
Values: true (1), false (0). Default: 0.

CompareNewCutsToOldOnes  If true then the LP process will check each newly received cut whether it already exists in the local cut pool or not.


Values: true (1), false (0). Default: 1.

CompareNewVarsToOldOnes  If true then the LP process will check each newly arrived variable whether it already exists in the local variable pool or not.


Values: true (1), false (0). Default: 1.

DoReducedCostFixingAtZero  If true the BCP will attempt to do reduced cost fixing only for variables currently at zero.


Values: true (1), false (0). Default: 1.

DoReducedCostFixingAtAnything  If true the BCP will attempt to do reduced cost fixing for any variable, no matter what is their current value.


Values: true (1), false (0). Default: 1.

MaintainIndexedVarPricingList  Indicate whether BCP is supposed to track the indexed variables yet to be priced out.
MessagePassingIsSerial  Indicates whether message passing is serial (all processes are on the same processor) or not.


Values: true (1), false (0). Default: 1.

ReportWhenDefaultIsExecuted  Print out a message when the default version of an overridable method is executed.

Default: 1.

SendFathomedNodeDesc  Whether to send back the description of fathomed search tree nodes to the Tree Manager.

(Might be needed to write proof of optimality.)
Values: true (1), false (0). Default: 1.

NoCompressionAtFathom  Whether we should refrain from compressing the problem description right before a fathomed node's description is sent back to the tree manager.


Values: true (1), false (0). Default: 0.

LpVerb_First  Just a marker for the first LpVerb.
LpVerb_AddedCutCount  Print the number of cuts added from the local cut pool in the current iteration.

(BCP_lp_main_loop)

LpVerb_AddedVarCount  Print the number of variables added from the local variable pool in the curent iteration.

(BCP_lp_main_loop)

LpVerb_ChildrenInfo  After a branching object is selected print what happens to the presolved children (e.g., fathomed).

(BCP_print_brobj_stat)

LpVerb_ColumnGenerationInfo  Print the number of variables generated before resolving the Lp ir fathoming a node.

(BCP_lp_fathom)

LpVerb_CutsToCutPoolCount  Print the number of cuts sent from the LP to the cut pool.

(BCP_lp_send_cuts_to_cp)

LpVerb_VarsToVarPoolCount  **** This parameter is not used anywhere!!! ****
LpVerb_FathomInfo  Print information related to fathoming.

(BCP_lp_main_loop, BCP_lp_perform_fathom, BCP_lp_branch) (BCP_lp_fathom)

LpVerb_IterationCount  Print the "Starting iteration x" line.

(BCP_lp_main_loop)

LpVerb_RelaxedSolution  Turn on the user hook "display_lp_solution".

(BCP_lp_main_loop)

LpVerb_FinalRelaxedSolution  Turn on the user hook "display_lp_solution" for the last LP relaxation solved at a search tree node.

(BCP_lp_main_loop)

LpVerb_LpMatrixSize  **** This parameter is not used anywhere!!! ****
LpVerb_LpSolutionValue  Print the size of the problem matrix and the LP solution value after resolving the LP.

(BCP_lp_main_loop)

LpVerb_MatrixCompression  Print the number of columns and rows that were deleted during matrix compression.

(BCP_lp_delete_cols_and_rows)

LpVerb_NodeTime  For each tree node print out how much time was spent on it.
LpVerb_PresolvePositions  Print detailed information about all the branching candidates during strong branching.

LpVerb_PresolveResult must be set for this parameter to have an effect. (BCP_lp_perform_strong_branching)

LpVerb_PresolveResult  Print information on the presolved branching candidates during strong branching.

(BCP_lp_perform_strong_branching)

LpVerb_ProcessedNodeIndex  Print the "Processing NODE x on LEVEL y" line.

(BCP_lp-main_loop)

LpVerb_ReportCutGenTimeout  Print information if receiving cuts is timed out.

(BCP_lp_generate_cuts)

LpVerb_ReportVarGenTimeout  Print information if receiving variables is timed out.

(BCP_lp_generate_vars)

LpVerb_ReportLocalCutPoolSize  Print the current number of cuts in the cut pool.

This number is printed several times: before and after generating columns at the current iteration, after removing non-essential cuts, etc. (BCP_lp_generate_cuts)

LpVerb_ReportLocalVarPoolSize  Similar as above for variables.

(BCP_lp_generate_vars)

LpVerb_RepricingResult  **** This parameter is not used anywhere!!! ****
LpVerb_VarTightening  Print the number of variables whose bounds have been changed by reduced cost fixing or logical fixing.

(BCP_lp_fix_vars)

LpVerb_RowEffectivenessCount  Print the number of ineffective rows in the current problem.

The definition of what rows are considered ineffective is determined by the paramter IneffectiveConstraints. (BCP_lp_adjust_row_effectiveness)

LpVerb_StrongBranchPositions  Print detailed information on the branching candidate selected by strong branching.

LpVerb_StrongBranchResult must be set fo this parameter to have an effect. (BCP_print_brobj_stat)

LpVerb_StrongBranchResult  Print information on the branching candidate selected by strong branching.

(BCP_print_brobj_stat)

LpVerb_GeneratedCutCount  Print the number of cuts generated during this iteration (since the LP was resolved last time).

(BCP_lp_main_loop)

LpVerb_GeneratedVarCount  Print the number of variables generated during this iteration.

(BCP_lp_main_loop)

LpVerb_Last  Just a marker for the last LpVerb.
end_of_chr_params 

Reimplemented in BCP_parameter_set< BCP_lp_par >.

Definition at line 17 of file BCP_lp_param.hpp.

enum BCP_lp_par::int_params

Integer parameters.

Enumerator:
NiceLevel  What should be the "niceness" of the LP process.

In a *nix environment the LP process will be reniced to this level.
Values: whatever the operating system accepts. Default: 0.

ScaleMatrix  Indicates how matrix scaling should be performed.

This parameter is directly passed to the LP solver's load_lp member function.
Values: whatever is valid for the LP solver that the user has passed on to BCP. Default: 0.

IndexedToPriceStorageSize  Indicates the number of entries stored in a BCP_indexed_pricing_list.


Values: any positive. Default: 1000.

SlackCutDiscardingStrategy  The slack cut discarding strategy used in the default version of the function purge_slack_pool().


Values: Default: BCP_DiscardSlackCutsAtNewIteration

CutEffectiveCountBeforePool  A cut has to remain effective through this many iterations in the LP before it is sent to the Cut Pool process.


The default 1000 effectively says that only those cuts are sent to the pool which are effective at branching.
Values: any positive number. Default: 1000.

CutPoolCheckFrequency  The Cut Pool is queried for violated valid inequalities after the first LP relaxation is solved and then after every this many iterations.


Values: any positive number. Default: 10.

VarPoolCheckFrequency  The Variable Pool is queried for columns that improve the formulation after the first LP realxation is solved, and then after every this many iterations.


Values: any positive number. Default: 10.

IneffectiveConstraints  Indicates which constraints should be considered ineffective.


Values: Default: BCP_IneffConstr_ZeroDualValue.

IneffectiveBeforeDelete  How many times in a row a constraint must be found ineffective before it is marked for deletion.


Values: any positive number. Default: 1.

MaxNonDualFeasToAdd_Min  The number of non dual-feasible colums that can be added at a time to the formulation is a certain fraction (MaxNonDualFeasToAdd_Frac) of the number of columns in the current formulation.

However, if the computed number is outside of the range [MaxNonDualFeasToAdd_Min, MaxNonDualFeasToAdd_Max] then it will be set to the appropriate endpoint of the range.
Values: . Default: 5.

MaxNonDualFeasToAdd_Max  See the description of the previous parameter.


Values: . Default: 200.

MaxIndexedToPriceToAdd_Min  When the tableau is total dual feasible some of variables from the list of the not yet fixed indexed variables are added to the formulation so that the list can be shorter in the descendant nodes (or may become empty).

These parameters play the same role in limiting the number of such variables as the two previous parameters for the non dual feasible variables.
Values: . Default: 5.

MaxIndexedToPriceToAdd_Max  See the description of the previous parameter.


Values: . Default: 200.

CutViolationNorm  How cut violation should be computed.


Values: Default: BCP_CutViolationNorm_Plain (violation in the usual sense). (The other option is BCP_CutViolationNorm_Distance: the distance of the fractional point from the cut.

MaxCutsAddedPerIteration  The maximum number of violated valid inequalities that can be added per iteration.


Values: . Default: 100,000.

MaxVarsAddedPerIteration  The maximum number of variables that can be added per iteration.


Values: . Default: 100,000.

MaxLeftoverCutNum  The maximum number of violated but not added cuts to be kept from one iteration to the next.

Also see the MaxLeftoverCutFrac parameter.

DeletedColToCompress_Min  The number of columns that must be marked for deletion before matrix compression can occur.

Matrix compressions also subject to a minimum number of marked columns as a fraction of the current number of columns (see DeletedColToCompress_Frac).
Values: positive integer. Default: 10.

DeletedRowToCompress_Min  The number of rows that must be marked for deletion before matrix compression can occur.

Matrix compressionis also subject to a minimum number of marked columns as a fraction of the current number of columns (see DeletedRowToCompress_Frac).
Values: positive integer. Default: 10.

MaxPresolveIter  Upper limit on the number of iterations performed in each of the children of the search tree node when presolving branching candidates.

This parameter is passed onto the LP solver. If the parameter is set to -1 then the branching candidates are not presolved and the first branching candidate is chosen (if there is any).
Note that for different LP solvers (e.g., simplex based algorithm or the Volume Algorithm) the meaning of an iteration is different, thus this parameter will be set differently.
Values: . Default: 100,000.

StrongBranch_CloseToHalfNum  Specifies how many branching variables with values close to half between two integers should be chosen by the built-in branching variable selection routine select_branching_candidates() (if this routine is used at all).

This number is passed onto the branch_close_to_half() helper function.
Values: . Default: 3.

StrongBranch_CloseToOneNum  Specifies how many branching variables with values close to an integer should be chosen by the built-in branching variable selection routine select_branching_candidates() (if this routine is used at all).

This number is passed onto the branch_close_to_one() helper function.
Values: . Default: 3.

BranchingObjectComparison  Specifies the rule used for built-in branching object comparison (if the buit-in routine is used at all).


Values: Default: BCP_HighestLowObjval.

ChildPreference  Specifies the rule used for selecting one of the children of the search tree node for diving.


Values: Default: BCP_PreferChild_LowBound.

FeasibilityTest  Specifies which built-in MIP feasibility testing routine should be invoked (if a buit-in routine is used at all).


Values: Default: BCP_FullTest_Feasible

InfoForCG  Indicates what part of the primal solution is sent to the Cut Generator process if the BCP_lp_user::pack_primal_solution() method is not overridden.


Values: See Default: BCP_PrimalSolution_Nonzeros.

InfoForVG  Indicates what part of the dual solution is sent to the Variable Generator process if the BCP_lp_user::pack_dual_solution() method is not overridden.


Values: See Default: BCP_DualSolution_Full.

end_of_int_params 

Reimplemented in BCP_parameter_set< BCP_lp_par >.

Definition at line 162 of file BCP_lp_param.hpp.

enum BCP_lp_par::dbl_params

Double parameters.

Enumerator:
Granularity  The minimum difference between the objective value of any two feasible solution (with different objective values).


Values: . Default: .

DeletedColToCompress_Frac  The fraction of columns that must be marked for deletion before matrix compression can occur.

Matrix compression is also subject to a minimum number of marked columns (see DeletedColToCompress_Min).
Values: . Default: 1e-8.

DeletedRowToCompress_Frac  The fraction of rows that must be marked for deletion before matrix compression can occur.

Matrix compression is also subject to a minimum number of marked rows (see DeletedRowToCompress_Min).
Values: . Default: 1e-8.

MaxNonDualFeasToAdd_Frac  The number of non dual-feasible colums that can be added to the formulation at a time cannot exceed this fraction of the the number of columns in the curent formulation.

However, this limit can be overruled by the hard bounds MaxIndexedToPriceToAdd_Min and MaxIndexedToPriceToAdd_Max (see above).
Values: . Default: 0.05.

MaxIndexedToPriceToAdd_Frac  When the tableau is total dual feasible and variables from the list of the not yet fixed indexed variables are added to the formulation, the number of such columns is limited to this fraction of the columns currently in the formulation.

However, this limit might be overruled by the hard bounds MaxIndexedToPriceToAdd_Min and MaxIndexedToPriceToAdd_Max (see above).
Values: . Default: 0.05.

MaxLeftoverCutFrac  The maximum fraction of the violated but not added cuts to be kept from one iteration to the next.

Also see the MaxLeftoverCutNum parameter.

IntegerTolerance  Values not further from an integer value than the value of this parameter are considered to be integer.


Values: . Default: .

FirstLP_FirstCutTimeout  This and the following three parameters control how long the LP process waits for generated cuts.

The parameters specify waiting times (in seconds) separately for the first and later LP relaxations at a search tree node, and also the time to receive the first cut vs all the cuts.
Note that it might make sense to set AllCutsTimeout for a shorter time than the first cut time out: "We are willing to wait 5 seconds to receive a cut, but if we do receive a cut the total time we wait is only 2 seconds."
This parameter specifies the time to wait for the first generated cut at the first LP relaxation at a search tree node.
Values: Any non-negative number represents a waiting time in seconds. Negative numbers indicate no time limit on waiting. Default: -1.

LaterLP_FirstCutTimeout  This parameter specifies the time to wait for the first generated cut at iterations that are not the first at a search tree node.

See the remarks at FirstLP_FirstCutTimeout as well.
Values: Any non-negative number represents a waiting time in seconds. Negative numbers indicate no time limit on waiting. Default: -1.

FirstLP_AllCutsTimeout  This parameter specifies the time to wait for cuts at the first LP relaxation at a search tree node.

See the remarks at FirstLP_FirstCutTimeout as well.
Values: Any non-negative number represents a waiting time in seconds. Negative numbers indicate no time limit on waiting. Default: -1.

LaterLP_AllCutsTimeout  This parameter specifies the time to wait for cuts at iterations that are not the first at a search tree node.

See the remarks at FirstLP_FirstCutTimeout as well.
Values: Any non-negative number represents a waiting time in seconds. Negative numbers indicate no time limit on waiting. Default: -1.

FirstLP_FirstVarTimeout  This and the following three parameters control how long the LP process waits for generated variables.

These parameters are analogous to the ones that control the waiting time for generated cuts. See the remarks at FirstLP_FirstCutTimeout as well.
This parameter specifies the time to wait for the first generated variable at the first LP relaxation at a search tree node.
Values: Any non-negative number represents a waiting time in seconds. Negative numbers indicate no time limit on waiting. Default: -1.

LaterLP_FirstVarTimeout  This parameter specifies the time to wait for the first generated variable at iterations that are not the first at a search tree node.

See the remarks at FirstLP_FirstVarTimeout as well.
Values: Any non-negative number represents a waiting time in seconds. Negative numbers indicate no time limit on waiting. Default: -1.

FirstLP_AllVarsTimeout  This parameter specifies the time to wait for variables at the first LP relaxation at a search tree node.

See the remarks at FirstLP_FirstVarTimeout as well.
Values: Any non-negative number represents a waiting time in seconds. Negative numbers indicate no time limit on waiting. Default: -1.

LaterLP_AllVarsTimeout  This parameter specifies the time to wait for variables at iterations that are not the first at a search tree node.

See the remarks at FirstLP_FirstVarTimeout as well.
Values: Any non-negative number represents a waiting time in seconds. Negative numbers indicate no time limit on waiting. Default: -1.

end_of_dbl_params 

Reimplemented in BCP_parameter_set< BCP_lp_par >.

Definition at line 329 of file BCP_lp_param.hpp.

enum BCP_lp_par::str_params

String parameters.

Enumerator:
LogFileName  The filename all the output should go to.
end_of_str_params 

Reimplemented in BCP_parameter_set< BCP_lp_par >.

Definition at line 447 of file BCP_lp_param.hpp.

enum BCP_lp_par::str_array_params

There are no string array parameters.

Enumerator:
str_array_dummy 
end_of_str_array_params 

Reimplemented in BCP_parameter_set< BCP_lp_par >.

Definition at line 455 of file BCP_lp_param.hpp.


The documentation for this struct was generated from the following file:
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