Matrix: Pothen/onera_dual
Description: onera_dual, with coordinates. From NASA, collected by Alex Pothen
(undirected graph drawing) |
Matrix properties | |
number of rows | 85,567 |
number of columns | 85,567 |
nonzeros | 419,201 |
structural full rank? | yes |
structural rank | 85,567 |
# of blocks from dmperm | 1 |
# strongly connected comp. | 1 |
explicit zero entries | 0 |
nonzero pattern symmetry | symmetric |
numeric value symmetry | symmetric |
type | binary |
structure | symmetric |
Cholesky candidate? | yes |
positive definite? | no |
author | NASA |
editor | G. Kumfert, A. Pothen |
date | 2003 |
kind | structural problem |
2D/3D problem? | yes |
Additional fields | size and type |
coord | full 85567-by-3 |
Ordering statistics: | result |
nnz(chol(P*(A+A'+s*I)*P')) with AMD | 10,520,808 |
Cholesky flop count | 8.4e+09 |
nnz(L+U), no partial pivoting, with AMD | 20,956,049 |
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD | 24,346,428 |
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD | 43,546,960 |
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.