| Matrix properties | |
| number of rows | 5,743 |
| number of columns | 5,743 |
| nonzeros | 198,787 |
| structural full rank? | yes |
| structural rank | 5,743 |
| # 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 | real |
| structure | symmetric |
| Cholesky candidate? | yes |
| positive definite? | no |
| author | Y. Zhou, Y. Saad, M. Tiago, J. Chelikowsky |
| editor | T. Davis |
| date | 2005 |
| kind | theoretical/quantum chemistry problem |
| 2D/3D problem? | no |
| Ordering statistics: | AMD | METIS |
| nnz(chol(P*(A+A'+s*I)*P')) | 7,526,576 | 4,699,656 |
| Cholesky flop count | 1.5e+10 | 5.9e+09 |
| nnz(L+U), no partial pivoting | 15,047,409 | 9,393,569 |
| nnz(V) for QR, upper bound nnz(L) for LU | 9,293,268 | 7,514,167 |
| nnz(R) for QR, upper bound nnz(U) for LU | 13,013,581 | 12,024,033 |
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.