| Matrix properties | |
| number of rows | 4,562 |
| number of columns | 4,562 |
| nonzeros | 137,887 |
| structural full rank? | yes |
| structural rank | 4,562 |
| # of blocks from dmperm | 322 |
| # strongly connected comp. | 322 |
| entries not in dmperm blocks | 6,298 |
| explicit zero entries | 300 |
| nonzero pattern symmetry | 95% |
| numeric value symmetry | 65% |
| type | real |
| structure | unsymmetric |
| Cholesky candidate? | no |
| positive definite? | no |
| author | A. Chapman |
| editor | A. Baggag, Y. Saad |
| date | 1996 |
| kind | computational fluid dynamics problem sequence |
| 2D/3D problem? | yes |
| Additional fields | size and type |
| b | full 4562-by-1 |
| x | full 4562-by-1 |
Notes:
next: DRIVCAV/cavity17 first: DRIVCAV/cavity16
| Ordering statistics: | AMD | METIS | DMPERM+ |
| nnz(chol(P*(A+A'+s*I)*P')) | 173,688 | 181,619 | 346,033 |
| Cholesky flop count | 1.1e+07 | 1.1e+07 | 4.1e+07 |
| nnz(L+U), no partial pivoting | 342,814 | 358,676 | 693,802 |
| nnz(V) for QR, upper bound nnz(L) for LU | 354,854 | 351,853 | 324,230 |
| nnz(R) for QR, upper bound nnz(U) for LU | 1,207,469 | 1,109,290 | 1,010,423 |
Note that all matrix statistics (except nonzero pattern symmetry) exclude the 300 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.