| Matrix properties | |
| number of rows | 94,893 |
| number of columns | 94,893 |
| nonzeros | 6,616,827 |
| structural full rank? | yes |
| structural rank | 94,893 |
| # 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 | P. Chen |
| editor | T. Davis |
| date | 2002 |
| kind | structural problem |
| 2D/3D problem? | yes |
| Ordering statistics: | AMD | METIS |
| nnz(chol(P*(A+A'+s*I)*P')) | 35,702,492 | 29,524,828 |
| Cholesky flop count | 4.0e+10 | 2.4e+10 |
| nnz(L+U), no partial pivoting | 71,310,091 | 58,954,763 |
| nnz(V) for QR, upper bound nnz(L) for LU | 77,525,840 | 66,525,909 |
| nnz(R) for QR, upper bound nnz(U) for LU | 215,417,632 | 171,450,601 |
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.