| Matrix properties | |
| number of rows | 6,747 |
| number of columns | 6,747 |
| nonzeros | 29,195 |
| structural full rank? | yes |
| structural rank | 6,747 |
| # of blocks from dmperm | 2,419 |
| # strongly connected comp. | 1 |
| entries not in dmperm blocks | 4,181 |
| explicit zero entries | 27,001 |
| nonzero pattern symmetry | 0% |
| numeric value symmetry | 0% |
| type | real |
| structure | unsymmetric |
| Cholesky candidate? | no |
| positive definite? | no |
| author | Bayer |
| editor | F. Grund |
| date | 1997 |
| kind | chemical process simulation problem |
| 2D/3D problem? | no |
| Additional fields | size and type |
| b | full 6747-by-1 |
| Ordering statistics: | AMD | METIS | DMPERM+ |
| nnz(chol(P*(A+A'+s*I)*P')) | 2,852,631 | 2,395,896 | 89,526 |
| Cholesky flop count | 4.2e+09 | 2.3e+09 | 4.6e+06 |
| nnz(L+U), no partial pivoting | 5,698,515 | 4,785,045 | 176,486 |
| nnz(V) for QR, upper bound nnz(L) for LU | 47,248 | 81,291 | 42,054 |
| nnz(R) for QR, upper bound nnz(U) for LU | 120,746 | 180,615 | 106,823 |
Note that all matrix statistics (except nonzero pattern symmetry) exclude the 27001 explicit zero entries.
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.