| Matrix properties | |
| number of rows | 317 |
| number of columns | 317 |
| nonzeros | 7,280 |
| structural full rank? | yes |
| structural rank | 317 |
| # of blocks from dmperm | 82 |
| # strongly connected comp. | 82 |
| entries not in dmperm blocks | 1,381 |
| explicit zero entries | 47 |
| nonzero pattern symmetry | 80% |
| numeric value symmetry | 52% |
| 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 317-by-1 |
| x | full 317-by-1 |
Notes:
next: DRIVCAV/cavity02 first: DRIVCAV/cavity01
| Ordering statistics: | AMD | METIS | DMPERM+ |
| nnz(chol(P*(A+A'+s*I)*P')) | 6,119 | 6,884 | 6,551 |
| Cholesky flop count | 1.3e+05 | 1.8e+05 | 2.0e+05 |
| nnz(L+U), no partial pivoting | 11,921 | 13,451 | 14,166 |
| nnz(V) for QR, upper bound nnz(L) for LU | 6,839 | 5,911 | 6,343 |
| nnz(R) for QR, upper bound nnz(U) for LU | 16,035 | 16,279 | 15,630 |
Note that all matrix statistics (except nonzero pattern symmetry) exclude the 47 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.