| Matrix properties | |
| number of rows | 40,000 |
| number of columns | 40,000 |
| nonzeros | 199,200 |
| structural full rank? | yes |
| structural rank | 40,000 |
| # 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? | yes |
| author | J. More', G. Toraldo |
| editor | N. Gould, Y. Hu, J. Scott |
| date | 1991 |
| kind | optimization problem |
| 2D/3D problem? | no |
| Ordering statistics: | AMD | METIS |
| nnz(chol(P*(A+A'+s*I)*P')) | 1,081,911 | 952,734 |
| Cholesky flop count | 1.1e+08 | 9.4e+07 |
| nnz(L+U), no partial pivoting | 2,123,822 | 1,865,468 |
| nnz(V) for QR, upper bound nnz(L) for LU | 1,797,823 | 1,776,164 |
| nnz(R) for QR, upper bound nnz(U) for LU | 3,294,336 | 3,278,170 |
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.