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

J. Walser | 10990 | 12471 | 3.38452e-04 | easy | 30_70 | 12 | 30_70_45_095_98.mps.gz |

Geographic radar station allocation

Imported from the MIPLIB2010 submissions.

Detailed explanation of the following tables can be found here.

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

Variables | 10990 | 10978 |

Constraints | 12471 | 12461 |

Binaries | 10989 | 10978 |

Integers | 0 | 0 |

Continuous | 1 | 0 |

Implicit Integers | 0 | 0 |

Fixed Variables | 1 | 0 |

Nonzero Density | 0.000338452 | 0.000338948 |

Nonzeroes | 46387 | 46367 |

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

Total | 12471 | 12461 |

Empty | 0 | 0 |

Free | 0 | 0 |

Singleton | 0 | 0 |

Aggregations | 0 | 0 |

Precedence | 10445 | 10435 |

Variable Bound | 5 | 5 |

Set Partitioning | 0 | 0 |

Set Packing | 0 | 0 |

Set Covering | 19 | 19 |

Cardinality | 0 | 0 |

Invariant Knapsack | 0 | 0 |

Equation Knapsack | 0 | 0 |

Bin Packing | 0 | 0 |

Knapsack | 0 | 0 |

Integer Knapsack | 0 | 0 |

Mixed Binary | 2002 | 2002 |

General Linear | 0 | 0 |

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 | 2.692847 | ||||

Constraint % | 0.0080300 | 0.170597 | 0.192601 | 1.30006 | |

Variable % | 0.0182166 | 0.203085 | 0.227707 | 1.53019 | |

Score | 0.836911 |

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 | 12 | 12 | 0 | 0 | 0 | - | 2018-10-11 | Solution found during MIPLIB2017 problem selection. |

The following instances are most similar to 30_70_45_095_98 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.

`No bibliographic information available`

Last Update Nov 16, 2020 by Philipp Wellner

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