| Matrix properties | |
| number of rows | 22,560 |
| number of columns | 22,560 |
| nonzeros | 1,014,951 |
| structural full rank? | yes |
| structural rank | 22,560 |
| # of blocks from dmperm | 2 |
| # strongly connected comp. | 2 |
| entries not in dmperm blocks | 12 |
| explicit zero entries | 0 |
| nonzero pattern symmetry | 64% |
| numeric value symmetry | 0% |
| type | real |
| structure | unsymmetric |
| Cholesky candidate? | no |
| positive definite? | no |
| author | R. Goodwin |
| editor | T. Davis |
| date | 1995 |
| kind | computational fluid dynamics problem |
| 2D/3D problem? | yes |
| Ordering statistics: | AMD | METIS | DMPERM+ |
| nnz(chol(P*(A+A'+s*I)*P')) | 1,927,907 | 1,733,710 | 3,574,040 |
| Cholesky flop count | 2.6e+08 | 1.8e+08 | 7.4e+08 |
| nnz(L+U), no partial pivoting | 3,833,254 | 3,444,860 | 7,125,532 |
| nnz(V) for QR, upper bound nnz(L) for LU | 4,940,213 | 3,349,024 | 2,997,226 |
| nnz(R) for QR, upper bound nnz(U) for LU | 16,753,049 | 9,521,901 | 8,973,829 |
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.