**Matrix: LPnetlib/lpi_mondou2**

Description: Netlib LP problem mondou2: minimize c'*x, where Ax=b, lo<=x<=hi

(bipartite graph drawing) |

Matrix properties | |

number of rows | 312 |

number of columns | 604 |

nonzeros | 1,208 |

structural full rank? | yes |

structural rank | 312 |

# of blocks from dmperm | 10 |

# strongly connected comp. | 1 |

explicit zero entries | 0 |

nonzero pattern symmetry | 0% |

numeric value symmetry | 0% |

type | integer |

structure | rectangular |

Cholesky candidate? | no |

positive definite? | no |

author | J. Mondou |

editor | J. Chinneck |

date | |

kind | linear programming problem |

2D/3D problem? | no |

Additional fields | size and type |

b | full 312-by-1 |

c | full 604-by-1 |

lo | full 604-by-1 |

hi | full 604-by-1 |

z0 | full 1-by-1 |

Notes:

An infeasible Netlib LP problem, in lp/infeas. For more information send email to netlib@ornl.gov with the message: send index from lp send readme from lp/infeas The lp/infeas directory contains infeasible linear programming test problems collected by John W. Chinneck, Carleton Univ, Ontario Canada. The following are relevant excerpts from lp/infeas/readme (by John W. Chinneck): PROBLEM DESCRIPTION ------------------- MONDOU2: medium size problem generated as a subproblem to a larger facility sizing algorithm used by Hydro-Quebec. The diagnosis of the infeasibility in the subproblem is useful to the larger algorithm. Contributor: J.-F. Mondou, Hydro-Quebec. Name Rows Cols Nonzeros Bounds Notes mondou2 313 604 1623 B

Ordering statistics: | result |

nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD | 4,810 |

nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD | 923 |

SVD-based statistics: | |

norm(A) | 4.48819 |

min(svd(A)) | 9.57105e-16 |

cond(A) | 4.68934e+15 |

rank(A) | 311 |

sprank(A)-rank(A) | 1 |

null space dimension | 1 |

full numerical rank? | no |

singular value gap | 1.12774e+14 |

singular values (MAT file): | click here |

SVD method used: | s = svd (full (A)) ; |

status: | ok |

For a description of the statistics displayed above, click here.

*Maintained by Tim Davis, last updated 12-Mar-2014.Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.
*