| Matrix properties | |
| number of rows | 3,072 |
| number of columns | 3,072 |
| nonzeros | 119,808 |
| structural full rank? | yes |
| structural rank | 3,072 |
| # of blocks from dmperm | 2 |
| # strongly connected comp. | 1 |
| entries not in dmperm blocks | 0 |
| explicit zero entries | 0 |
| nonzero pattern symmetry | 92% |
| numeric value symmetry | 46% |
| type | complex |
| structure | unsymmetric |
| Cholesky candidate? | no |
| positive definite? | no |
| author | B. Medeke |
| editor | R. Boisvert, R. Pozo, K. Remington, B. Miller, R. Lipman, R. Barrett, J. Dongarra |
| date | 1999 |
| kind | theoretical/quantum chemistry problem |
| 2D/3D problem? | no |
| Ordering statistics: | AMD | METIS | DMPERM+ |
| nnz(chol(P*(A+A'+s*I)*P')) | 1,015,776 | 1,135,146 | 557,016 |
| Cholesky flop count | 7.8e+08 | 8.9e+08 | 1.9e+08 |
| nnz(L+U), no partial pivoting | 2,028,480 | 2,267,220 | 1,110,960 |
| nnz(V) for QR, upper bound nnz(L) for LU | 1,047,318 | 1,169,673 | 1,288,320 |
| nnz(R) for QR, upper bound nnz(U) for LU | 1,789,278 | 1,782,879 | 1,755,168 |
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.