| Matrix properties | |
| number of rows | 445,315 |
| number of columns | 445,315 |
| nonzeros | 7,479,343 |
| structural full rank? | yes |
| structural rank | 445,315 |
| # 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 | 20% |
| type | real |
| structure | unsymmetric |
| Cholesky candidate? | no |
| positive definite? | no |
| author | A. van Heukelum |
| editor | T. Davis |
| date | 2003 |
| kind | directed weighted graph |
| 2D/3D problem? | no |
| Ordering statistics: | AMD | METIS |
| nnz(chol(P*(A+A'+s*I)*P')) | 1.527063e+10 | 2.230274e+09 |
| Cholesky flop count | 1.3e+15 | 4.1e+13 |
| nnz(L+U), no partial pivoting | 3.054081e+10 | 4.460103e+09 |
| nnz(V) for QR, upper bound nnz(L) for LU | 1.867396e+10 | 6.414549e+09 |
| nnz(R) for QR, upper bound nnz(U) for LU | 2.917877e+10 | 1.158605e+10 |
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.