Matrix: Schenk_AFE/af_5_k101
Description: AutoForm Eng, Zurich. pos. def. sheet metal forming
(undirected graph drawing) |
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.