| Matrix properties | |
| number of rows | 70,304 |
| number of columns | 70,304 |
| nonzeros | 1,528,092 |
| structural full rank? | yes |
| structural rank | 70,304 |
| # of blocks from dmperm | 7,066 |
| # strongly connected comp. | 121 |
| entries not in dmperm blocks | 95,912 |
| 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')) | 137,644,638 | 93,250,215 | 3,312,587 |
| Cholesky flop count | 7.0e+11 | 2.6e+11 | 2.7e+08 |
| nnz(L+U), no partial pivoting | 275,218,972 | 186,430,126 | 6,650,782 |
| nnz(V) for QR, upper bound nnz(L) for LU | 3,400,724 | 4,079,070 | 2,228,373 |
| nnz(R) for QR, upper bound nnz(U) for LU | 6,882,356 | 8,643,840 | 4,972,393 |
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.