| Matrix properties | |
| number of rows | 35,152 |
| number of columns | 35,152 |
| nonzeros | 764,014 |
| structural full rank? | yes |
| structural rank | 35,152 |
| # of blocks from dmperm | 3,533 |
| # strongly connected comp. | 61 |
| entries not in dmperm blocks | 47,924 |
| explicit zero entries | 0 |
| nonzero pattern symmetry | 0% |
| numeric value symmetry | 0% |
| type | real |
| structure | unsymmetric |
| Cholesky candidate? | no |
| positive definite? | no |
| author | J. Mallya |
| editor | T. Davis |
| date | 1997 |
| kind | chemical process simulation problem |
| 2D/3D problem? | no |
| Ordering statistics: | AMD | METIS | DMPERM+ |
| nnz(chol(P*(A+A'+s*I)*P')) | 70,123,656 | 46,680,651 | 1,681,426 |
| Cholesky flop count | 3.6e+11 | 1.3e+11 | 1.3e+08 |
| nnz(L+U), no partial pivoting | 140,212,160 | 93,326,150 | 3,375,624 |
| nnz(V) for QR, upper bound nnz(L) for LU | 1,660,979 | 2,028,935 | 1,111,597 |
| nnz(R) for QR, upper bound nnz(U) for LU | 3,379,045 | 4,252,958 | 2,485,784 |
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.