| Matrix properties | |
| number of rows | 105,676 |
| number of columns | 105,676 |
| nonzeros | 513,072 |
| structural full rank? | yes |
| structural rank | 105,676 |
| # of blocks from dmperm | 1,420 |
| # strongly connected comp. | 1,359 |
| entries not in dmperm blocks | 6,018 |
| explicit zero entries | 0 |
| nonzero pattern symmetry | 100% |
| numeric value symmetry | 20% |
| type | real |
| structure | unsymmetric |
| Cholesky candidate? | no |
| positive definite? | no |
| author | S. Hamm |
| editor | T. Davis |
| date | 2001 |
| kind | circuit simulation problem |
| 2D/3D problem? | no |
| Additional fields | size and type |
| b | full 105676-by-1 |
| Ordering statistics: | AMD | METIS | DMPERM+ |
| nnz(chol(P*(A+A'+s*I)*P')) | 368,316 | 380,574 | 362,244 |
| Cholesky flop count | 1.7e+06 | 2.0e+06 | 1.6e+06 |
| nnz(L+U), no partial pivoting | 630,956 | 655,472 | 624,830 |
| nnz(V) for QR, upper bound nnz(L) for LU | 3,433,900 | 3,195,259 | 1,670,171 |
| nnz(R) for QR, upper bound nnz(U) for LU | 10,042,058 | 7,627,616 | 3,879,567 |
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.