Matrix: Meszaros/baxter
Description: linear programming problem, C. Meszaros test set
| Matrix properties | |
| number of rows | 27,441 |
| number of columns | 30,733 |
| nonzeros | 111,576 |
| structural full rank? | no |
| structural rank | 24,386 |
| # of blocks from dmperm | 74 |
| # strongly connected comp. | 43 |
| explicit zero entries | 0 |
| nonzero pattern symmetry | 0% |
| numeric value symmetry | 0% |
| type | real |
| structure | rectangular |
| Cholesky candidate? | no |
| positive definite? | no |
| author | |
| editor | C. Meszaros |
| date | 2004 |
| kind | linear programming problem |
| 2D/3D problem? | no |
| Additional fields | size and type |
| b | full 27441-by-1 |
| c | full 30733-by-1 |
| lo | full 30733-by-1 |
| hi | full 30733-by-1 |
| z0 | full 1-by-1 |
Notes:
http://www.sztaki.hu/~meszaros/public_ftp/lptestset Converted to standard form via Resende and Veiga's mpsrd: minimize c'*x, subject to A*x=b and lo <= x <= hi
| Ordering statistics: | AMD | METIS |
| nnz(V) for QR, upper bound nnz(L) for LU | 17,468,713 | 9,789,663 |
| nnz(R) for QR, upper bound nnz(U) for LU | 7,695,791 | 5,726,670 |
Maintained by Tim Davis, last updated 05-Nov-2008.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.