Matrix: Qaplib/lp_nug30
Description: Netlib LP problem nug30: minimize c'*x, where Ax=b, lo<=x<=hi
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| (bipartite graph drawing) |
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| Matrix properties | |
| number of rows | 52,260 |
| number of columns | 379,350 |
| nonzeros | 1,567,800 |
| structural full rank? | yes |
| structural rank | 52,260 |
| # of blocks from dmperm | 1 |
| # 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 | M. Resende |
| editor | M. Resende |
| date | 1995 |
| kind | linear programming problem |
| 2D/3D problem? | no |
| Additional fields | size and type |
| b | full 52260-by-1 |
| c | full 379350-by-1 |
| lo | full 379350-by-1 |
| hi | full 379350-by-1 |
| z0 | full 1-by-1 |
| Ordering statistics: | result |
| nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD | 13,054,845,440 |
| nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD | 750,645,329 |
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.