| Matrix properties | |
| number of rows | 12,504 |
| number of columns | 12,504 |
| nonzeros | 874,887 |
| structural full rank? | yes |
| structural rank | 12,504 |
| # of blocks from dmperm | 1 |
| # strongly connected comp. | 1 |
| entries not in dmperm blocks | 0 |
| explicit zero entries | 0 |
| nonzero pattern symmetry | 100% |
| numeric value symmetry | 44% |
| type | real |
| structure | unsymmetric |
| Cholesky candidate? | no |
| positive definite? | no |
| author | COMSOL |
| editor | T. Davis |
| date | 2003 |
| kind | structural problem |
| 2D/3D problem? | yes |
| Additional fields | size and type |
| b | full 12504-by-1 |
| Ordering statistics: | AMD | METIS |
| nnz(chol(P*(A+A'+s*I)*P')) | 1,910,625 | 2,081,927 |
| Cholesky flop count | 4.5e+08 | 5.0e+08 |
| nnz(L+U), no partial pivoting | 3,808,746 | 4,151,350 |
| nnz(V) for QR, upper bound nnz(L) for LU | 3,515,861 | 4,078,682 |
| nnz(R) for QR, upper bound nnz(U) for LU | 10,528,278 | 10,121,730 |
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.