Submitter Variables Constraints Density Status Group Objective MPS File
A. Caprara, M. Fischetti, P. Toth 13226 2589 3.057e-03 open core 950 core2586-950.mps.gz

Set covering instance coming from Italian railway models

Imported from the MIPLIB2010 submissions.

Instance Statistics

Detailed explanation of the following tables can be found here.

Size Related Properties
Original Presolved
Variables 13226 13179
Constraints 2589 2495
Binaries 13215 13179
Integers 0 0
Continuous 11 0
Implicit Integers 0 0
Fixed Variables 0 0
Nonzero Density 0.00305700 0.00273831
Nonzeroes 104678 90040
Constraint Classification Properties
Original Presolved
Total 2589 2495
Empty 0 0
Free 0 0
Singleton 42 0
Aggregations 0 0
Precedence 0 0
Variable Bound 36 26
Set Partitioning 0 0
Set Packing 0 0
Set Covering 2508 2468
Cardinality 0 0
Invariant Knapsack 1 1
Equation Knapsack 0 0
Bin Packing 0 0
Knapsack 0 0
Integer Knapsack 0 0
Mixed Binary 2 0
General Linear 0 0
Indicator 0 0

Structure

Available nonzero structure and decomposition information. Further information can be found here.

value min median mean max
Components 0.4771212
Constraint % 1.082160 49.4589 49.4589 97.8357
Variable % 0.597987 49.8637 49.8637 99.1295
Score 0.0192730

Best Known Solution(s)

Find solutions below. Download the archive containing all solutions from the Download page.

ID Objective Exact Int. Viol Cons. Viol Obj. Viol Submitter Date Description
1 950 950 0 0 0 - 2018-10-11 Solution found during MIPLIB2017 problem selection.

Similar instances in collection

The following instances are most similar to core2586-950 in the collection. This similarity analysis is based on 100 scaled instance features describing properties of the variables, objective function, bounds, constraints, and right hand sides.

Instance Variables Binaries Integers Continuous Constraints Nonz. Submitter Group Status Objective
core4872-1529 24656 24645 0 11 4875 218762 A. Caprara, M. Fischetti, P. Toth core open 1537*
core4284-1064 21714 21705 0 9 4287 245121 A. Caprara, M. Fischetti, P. Toth core open 1067*
core2536-691 15293 15284 0 9 2539 177739 A. Caprara, M. Fischetti, P. Toth core easy 689
rail507 63019 63009 0 10 509 468878 A. Caprara, M. Fischetti, P. Toth easy 174
ex1010-pi 25200 25200 0 0 1468 102114 M. Winkler open 239*

Reference

No bibliographic information available

Last Update Nov 09, 2018 by Gregor Hendel
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