| Matrix properties | |
| number of rows | 14,214 |
| number of columns | 14,214 |
| nonzeros | 259,688 |
| structural full rank? | yes |
| structural rank | 14,214 |
| # of blocks from dmperm | 638 |
| # strongly connected comp. | 638 |
| entries not in dmperm blocks | 4,500 |
| explicit zero entries | 0 |
| nonzero pattern symmetry | 98% |
| numeric value symmetry | 0% |
| type | real |
| structure | unsymmetric |
| Cholesky candidate? | no |
| positive definite? | no |
| author | D. Engwirda |
| editor | T. Davis |
| date | 2006 |
| kind | computational fluid dynamics problem |
| 2D/3D problem? | yes |
| Additional fields | size and type |
| coord | full 14214-by-2 |
| t | full 27748-by-3 |
Notes:
trimesh(t,coord(:,1),coord(:,2),A\ones(n,1))
| Ordering statistics: | AMD | METIS | DMPERM+ |
| nnz(chol(P*(A+A'+s*I)*P')) | 1,188,344 | 1,081,849 | 1,041,031 |
| Cholesky flop count | 1.8e+08 | 1.4e+08 | 1.3e+08 |
| nnz(L+U), no partial pivoting | 2,362,474 | 2,149,484 | 2,072,348 |
| nnz(V) for QR, upper bound nnz(L) for LU | 1,623,733 | 1,648,803 | 1,567,549 |
| nnz(R) for QR, upper bound nnz(U) for LU | 3,133,402 | 3,195,365 | 2,976,756 |
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.