| Matrix properties | |
| number of rows | 1,182 |
| number of columns | 1,182 |
| nonzeros | 32,632 |
| structural full rank? | yes |
| structural rank | 1,182 |
| # of blocks from dmperm | 162 |
| # strongly connected comp. | 162 |
| entries not in dmperm blocks | 3,021 |
| explicit zero entries | 115 |
| nonzero pattern symmetry | 90% |
| numeric value symmetry | 61% |
| 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 1182-by-1 |
| x | full 1182-by-1 |
Notes:
next: DRIVCAV/cavity06 first: DRIVCAV/cavity05
| Ordering statistics: | AMD | METIS | DMPERM+ |
| nnz(chol(P*(A+A'+s*I)*P')) | 32,530 | 36,959 | 52,499 |
| Cholesky flop count | 1.2e+06 | 1.5e+06 | 3.6e+06 |
| nnz(L+U), no partial pivoting | 63,878 | 72,736 | 106,837 |
| nnz(V) for QR, upper bound nnz(L) for LU | 49,007 | 55,342 | 49,477 |
| nnz(R) for QR, upper bound nnz(U) for LU | 140,963 | 158,334 | 138,805 |
Note that all matrix statistics (except nonzero pattern symmetry) exclude the 115 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.