| Matrix properties | |
| number of rows | 4,098 |
| number of columns | 4,098 |
| nonzeros | 72,356 |
| structural full rank? | yes |
| structural rank | 4,098 |
| # 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 | F. Cannizzo |
| editor | T. Davis |
| date | 2004 |
| kind | structural problem |
| 2D/3D problem? | yes |
| Additional fields | size and type |
| b | sparse 4098-by-1 |
| Ordering statistics: | AMD | METIS |
| nnz(chol(P*(A+A'+s*I)*P')) | 138,352 | 151,683 |
| Cholesky flop count | 7.0e+06 | 8.5e+06 |
| nnz(L+U), no partial pivoting | 272,606 | 299,268 |
| nnz(V) for QR, upper bound nnz(L) for LU | 597,542 | 476,181 |
| nnz(R) for QR, upper bound nnz(U) for LU | 984,086 | 1,118,101 |
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.