| Matrix properties | |
| number of rows | 4,510 |
| number of columns | 4,510 |
| nonzeros | 21,199 |
| structural full rank? | yes |
| structural rank | 4,510 |
| # of blocks from dmperm | 3,249 |
| # strongly connected comp. | 3,231 |
| entries not in dmperm blocks | 8,249 |
| explicit zero entries | 0 |
| nonzero pattern symmetry | 81% |
| numeric value symmetry | 42% |
| type | real |
| structure | unsymmetric |
| Cholesky candidate? | no |
| positive definite? | no |
| author | W. Bomhof |
| editor | T. Davis |
| date | 2000 |
| kind | circuit simulation problem |
| 2D/3D problem? | no |
| Additional fields | size and type |
| b | full 4510-by-1 |
| x | full 4510-by-1 |
| Ordering statistics: | AMD | METIS | DMPERM+ |
| nnz(chol(P*(A+A'+s*I)*P')) | 19,811 | 22,472 | 19,267 |
| Cholesky flop count | 2.2e+05 | 3.3e+05 | 3.6e+05 |
| nnz(L+U), no partial pivoting | 35,112 | 40,434 | 42,273 |
| nnz(V) for QR, upper bound nnz(L) for LU | 389,906 | 682,940 | 59,412 |
| nnz(R) for QR, upper bound nnz(U) for LU | 821,763 | 822,767 | 115,273 |
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.