| Matrix properties | |
| number of rows | 10,672 |
| number of columns | 10,672 |
| nonzeros | 232,633 |
| structural full rank? | yes |
| structural rank | 10,672 |
| # of blocks from dmperm | 908 |
| # strongly connected comp. | 31 |
| entries not in dmperm blocks | 13,967 |
| explicit zero entries | 0 |
| nonzero pattern symmetry | 1% |
| 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')) | 11,914,369 | 9,200,524 | 552,164 |
| Cholesky flop count | 3.5e+10 | 1.7e+10 | 4.3e+07 |
| nnz(L+U), no partial pivoting | 23,818,066 | 18,390,376 | 1,107,623 |
| nnz(V) for QR, upper bound nnz(L) for LU | 370,538 | 558,277 | 320,965 |
| nnz(R) for QR, upper bound nnz(U) for LU | 847,036 | 1,188,080 | 733,461 |
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.