| Matrix properties | |
| number of rows | 1,650 |
| number of columns | 1,650 |
| nonzeros | 7,419 |
| structural full rank? | yes |
| structural rank | 1,650 |
| # of blocks from dmperm | 2 |
| # strongly connected comp. | 2 |
| entries not in dmperm blocks | 2,473 |
| explicit zero entries | 0 |
| nonzero pattern symmetry | 57% |
| numeric value symmetry | 0% |
| type | real |
| structure | unsymmetric |
| Cholesky candidate? | no |
| positive definite? | no |
| author | S. Norris |
| editor | T. Davis |
| date | 2003 |
| kind | computational fluid dynamics problem |
| 2D/3D problem? | yes |
| Ordering statistics: | AMD | METIS | DMPERM+ |
| nnz(chol(P*(A+A'+s*I)*P')) | 5,771 | 8,011 | 3,298 |
| Cholesky flop count | 2.1e+04 | 4.2e+04 | 6.6e+03 |
| nnz(L+U), no partial pivoting | 9,892 | 14,372 | 7,419 |
| nnz(V) for QR, upper bound nnz(L) for LU | 5,080 | 7,603 | 3,298 |
| nnz(R) for QR, upper bound nnz(U) for LU | 9,751 | 13,715 | 7,643 |
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.