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CUTAGGROWS

Description
Strategy for row aggregation used when separating Mixed Integer Rounding (MIR) cuts, lifted cover cuts and Strong Chvatal-Gomory (CG) cuts. Row aggregation combines several rows of the problem into a single row from which a cut is then derived. A more aggressive strategy will try more and more complex row aggregations, which can uncover cuts that would otherwise be missed, at the cost of extra computational effort and, in some cases, at the cost of separating denser cutting planes that could slow down the node throughput.
Type
Integer
Topic areas
Cuts, Branch and Bound Search
Values
-1 
XPRS_CUTAGGROWS_AUTOMATIC Automatic selection of the row aggregation strategy.
0 
XPRS_CUTAGGROWS_OFF Off. No row aggregation.
1 
XPRS_CUTAGGROWS_CONSERVATIVE Conservative row aggregation strategy.
2 
XPRS_CUTAGGROWS_MODERATE Moderate row aggregation strategy.
3 
XPRS_CUTAGGROWS_AGGRESSIVE Aggressive row aggregation strategy.
4 
XPRS_CUTAGGROWS_VERYAGGRESSIVE Very aggressive row aggregation strategy.
Default value
-1
Affects routines
XPRSmipoptimize ( MIPOPTIMIZE).
See also
CUTFROMCUTROWS, CUTSEPMIRSTRATEGY, CUTSEPCOVERSTRATEGY, CUTSEPSTRONGCGSTRATEGY.
Category
Control

Parent Topic Control Parameters

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