| Matrix properties | |
| number of rows | 72,000 |
| number of columns | 72,000 |
| nonzeros | 28,715,634 |
| structural full rank? | yes |
| structural rank | 72,000 |
| # of blocks from dmperm | 1 |
| # strongly connected comp. | 1 |
| entries not in dmperm blocks | 0 |
| explicit zero entries | 0 |
| nonzero pattern symmetry | symmetric |
| numeric value symmetry | symmetric |
| type | real |
| structure | symmetric |
| Cholesky candidate? | yes |
| positive definite? | yes |
| author | author unknown |
| editor | T. Davis |
| date | 2003 |
| kind | 2D/3D problem |
| 2D/3D problem? | yes |
| Ordering statistics: | AMD | METIS |
| nnz(chol(P*(A+A'+s*I)*P')) | 511,595,052 | 325,755,537 |
| Cholesky flop count | 5.6e+12 | 2.2e+12 |
| nnz(L+U), no partial pivoting | 1,023,118,104 | 651,439,074 |
| nnz(V) for QR, upper bound nnz(L) for LU | 456,249,857 | - |
| nnz(R) for QR, upper bound nnz(U) for LU | 932,849,973 | - |
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.