Matrix: Schenk_AFE/af_4_k101
Description: AutoForm Eng, Zurich. pos. def. sheet metal forming
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| (undirected graph drawing) |
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| Matrix properties | |
| number of rows | 503,625 |
| number of columns | 503,625 |
| nonzeros | 17,550,675 |
| structural full rank? | yes |
| structural rank | 503,625 |
| # of blocks from dmperm | 1 |
| # strongly connected comp. | 1 |
| explicit zero entries | 0 |
| nonzero pattern symmetry | symmetric |
| numeric value symmetry | symmetric |
| type | real |
| structure | symmetric |
| Cholesky candidate? | yes |
| positive definite? | yes |
| author | AutoForm Eng. |
| editor | O. Schenk |
| date | 2006 |
| kind | structural problem |
| 2D/3D problem? | yes |
| Additional fields | size and type |
| b | full 503625-by-1 |
| Ordering statistics: | result |
| nnz(chol(P*(A+A'+s*I)*P')) with AMD | 121,260,075 |
| Cholesky flop count | 1.1e+11 |
| nnz(L+U), no partial pivoting, with AMD | 242,016,525 |
| nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD | 223,585,850 |
| nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD | 435,336,425 |
For a description of the statistics displayed above, click here.
Maintained by Tim Davis, last updated 12-Mar-2014.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.