| Matrix properties | |
| number of rows | 24,696 |
| number of columns | 24,696 |
| nonzeros | 1,751,178 |
| structural full rank? | yes |
| structural rank | 24,696 |
| # of blocks from dmperm | 1 |
| # strongly connected comp. | 1 |
| entries not in dmperm blocks | 0 |
| explicit zero entries | 0 |
| nonzero pattern symmetry | symmetric |
| numeric value symmetry | symmetric |
| type | binary |
| structure | symmetric |
| Cholesky candidate? | yes |
| positive definite? | no |
| author | R. Grimes |
| editor | T. Davis |
| date | 1995 |
| kind | duplicate materials problem |
| 2D/3D problem? | yes |
Notes:
This matrix is the nonzero pattern of Boeing/crystk03
| Ordering statistics: | AMD | METIS |
| nnz(chol(P*(A+A'+s*I)*P')) | 12,803,170 | 9,513,378 |
| Cholesky flop count | 1.2e+10 | 5.6e+09 |
| nnz(L+U), no partial pivoting | 25,581,644 | 19,002,060 |
| nnz(V) for QR, upper bound nnz(L) for LU | 11,745,450 | 13,658,247 |
| nnz(R) for QR, upper bound nnz(U) for LU | 23,259,357 | 26,036,775 |
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.