Submitter | Variables | Constraints | Density | Status | Group | Objective | MPS File |
---|---|---|---|---|---|---|---|

E-Plus, D. Bienstock, A. Bley, R. Wessäly | 48738 | 21732 | 2.43144e-04 | easy | – | 90.009878614 | atlanta-ip.mps.gz |

Min-cost network dimensioning problems with a finite set of link capacities for each bidirected link, unsplittable shortest path routing, path restoration for single node failures, and routing path length restrictions

Imported from MIPLIB2010.

Detailed explanation of the following tables can be found here.

Original | Presolved | |
---|---|---|

Variables | 48738 | 18476 |

Constraints | 21732 | 20609 |

Binaries | 46667 | 17175 |

Integers | 106 | 97 |

Continuous | 1965 | 1204 |

Implicit Integers | 0 | 22 |

Fixed Variables | 93 | 0 |

Nonzero Density | 0.000243144 | 0.000487859 |

Nonzeroes | 257532 | 185763 |

Original | Presolved | |
---|---|---|

Total | 21732 | 20609 |

Empty | 1 | 0 |

Free | 0 | 0 |

Singleton | 176 | 0 |

Aggregations | 573 | 604 |

Precedence | 0 | 17 |

Variable Bound | 2293 | 1810 |

Set Partitioning | 782 | 969 |

Set Packing | 0 | 0 |

Set Covering | 0 | 3 |

Cardinality | 5540 | 5306 |

Invariant Knapsack | 2209 | 2246 |

Equation Knapsack | 0 | 0 |

Bin Packing | 0 | 408 |

Knapsack | 774 | 659 |

Integer Knapsack | 1 | 2 |

Mixed Binary | 9202 | 8443 |

General Linear | 181 | 142 |

Indicator | 0 | 0 |

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

Decomposed structure of original problem (dec-file)

Decomposed structure after trivial presolving (dec-file)

value | min | median | mean | max | |
---|---|---|---|---|---|

Components | 1.591065 | ||||

Constraint % | 0.0145921 | 1.13268 | 0.860937 | 5.59366 | |

Variable % | 0.2543290 | 2.61250 | 4.101730 | 4.84307 | |

Score | 0.411046 |

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 | 90.00988 | 90.00988 | 0 | 0 | 0 | - | 2018-10-12 | Solution found during MIPLIB2017 problem selection. |

The following instances are most similar to atlanta-ip 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.

```
@techreport{BleyKoch2002,
author = {Andreas Bley and Thorsten Koch},
institution = {Zuse Institute Berlin},
language = {English},
number = {ZR 02-41},
title = {Integer programming approaches to access and backbone {IP}-network planning},
year = {2002}
}
```

Last Update Aug 28, 2019 by Gregor Hendel

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