| Matrix properties | |
| number of rows | 7,337 |
| number of columns | 7,337 |
| nonzeros | 156,508 |
| structural full rank? | yes |
| structural rank | 7,337 |
| # of blocks from dmperm | 672 |
| # strongly connected comp. | 31 |
| entries not in dmperm blocks | 9,639 |
| explicit zero entries | 0 |
| nonzero pattern symmetry | 2% |
| numeric value symmetry | 0% |
| type | real |
| structure | unsymmetric |
| Cholesky candidate? | no |
| positive definite? | no |
| author | J. Mallya |
| editor | T. Davis |
| date | 1997 |
| kind | chemical process simulation problem |
| 2D/3D problem? | no |
| Ordering statistics: | AMD | METIS | DMPERM+ |
| nnz(chol(P*(A+A'+s*I)*P')) | 5,667,528 | 4,381,743 | 369,039 |
| Cholesky flop count | 1.1e+10 | 5.3e+09 | 2.9e+07 |
| nnz(L+U), no partial pivoting | 11,327,719 | 8,756,149 | 740,380 |
| nnz(V) for QR, upper bound nnz(L) for LU | 269,468 | 365,698 | 225,785 |
| nnz(R) for QR, upper bound nnz(U) for LU | 603,211 | 782,157 | 507,057 |
Maintained by Tim Davis, last updated 04-May-2008.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.