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

János Höner | 747601 | 1154615 | 5.46874e-06 | open | – | 121108.0* | tpl-tub-ws1617.mps.gz |

Model for the Post-Enrollment Course Timetabling Problem at TU Berlin from the summer term 2016 and the winter term 2016/2017

Detailed explanation of the following tables can be found here.

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

Variables | 747601 | 707630 |

Constraints | 1154615 | 690366 |

Binaries | 713749 | 674652 |

Integers | 0 | 28846 |

Continuous | 33852 | 4132 |

Implicit Integers | 0 | 28846 |

Fixed Variables | 0 | 0 |

Nonzero Density | 5.46874e-06 | 8.05884e-06 |

Nonzeroes | 4720570 | 3936940 |

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

Total | 1154615 | 690366 |

Empty | 85028 | 0 |

Free | 0 | 0 |

Singleton | 320953 | 0 |

Aggregations | 1546 | 297 |

Precedence | 141482 | 124535 |

Variable Bound | 278863 | 246549 |

Set Partitioning | 0 | 37685 |

Set Packing | 283662 | 276243 |

Set Covering | 0 | 0 |

Cardinality | 8839 | 0 |

Invariant Knapsack | 275 | 690 |

Equation Knapsack | 0 | 0 |

Bin Packing | 298 | 5 |

Knapsack | 612 | 450 |

Integer Knapsack | 0 | 0 |

Mixed Binary | 33057 | 3912 |

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 | |||||

Constraint % | |||||

Variable % | |||||

Score |

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 | |
---|---|---|---|---|---|---|---|---|---|

3 | 4 | 121108 | 0 | 0 | 0 | Edward Rothberg | 2020-04-22 | Obtained with the Gurobi solution improvement heuristic | |

1 | 3 | 121210 | 0 | 0 | 0 | Edward Rothberg | 2020-02-04 | Found with Gurobi 9.0 | |

4 | 2 | 144704 | 0 | 0 | 0 | Robert Ashford and Alkis Vazacopoulus | 2019-12-18 | Found using ODH|CPlex | |

2 | 1 | 149397 | 149397 | 0 | 0 | 0 | - | 2018-10-13 | Solution found during MIPLIB2017 problem selection. |

The following instances are most similar to tpl-tub-ws1617 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.

```
@article{honer2015ip,
title={An IP-based model for the post-enrollment-based course timetabling problem at TU Berlin},
author={H{\"o}ner, J and Lach, G and Zorn, E},
journal={MISTA},
pages={331--344},
year={2015}
}
```

Last Update Jun 24, 2020 by Gabriel Kressin

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