Matrix: Wissgott/parabolic_fem
Description: Parabolic FEM, diffusion-convection reaction, constant homogenous diffusion
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| Matrix properties | |
| number of rows | 525,825 |
| number of columns | 525,825 |
| nonzeros | 3,674,625 |
| structural full rank? | yes |
| structural rank | 525,825 |
| # 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 | P. Wissgott |
| editor | T. Davis |
| date | 2007 |
| kind | computational fluid dynamics problem |
| 2D/3D problem? | yes |
| Additional fields | size and type |
| b | full 525825-by-1 |
| Ordering statistics: | result |
| nnz(chol(P*(A+A'+s*I)*P')) with AMD | 36,132,647 |
| Cholesky flop count | 1.7e+10 |
| nnz(L+U), no partial pivoting, with AMD | 71,739,469 |
| nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD | 59,085,761 |
| nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD | 108,497,358 |
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.