Matrix: Sandia/ASIC_680k
Description: Sandia, Xyce circuit simulation matrix (stripped)
(undirected graph drawing) |
Matrix properties | |
number of rows | 682,862 |
number of columns | 682,862 |
nonzeros | 2,638,997 |
structural full rank? | yes |
structural rank | 682,862 |
# of blocks from dmperm | 583,921 |
# strongly connected comp. | 583,523 |
explicit zero entries | 1,232,776 |
nonzero pattern symmetry | symmetric |
numeric value symmetry | 0% |
type | real |
structure | unsymmetric |
Cholesky candidate? | no |
positive definite? | no |
author | R. Hoekstra |
editor | T. Davis |
date | 2006 |
kind | circuit simulation problem |
2D/3D problem? | no |
Ordering statistics: | result |
nnz(chol(P*(A+A'+s*I)*P')) with AMD | 3,634,882 |
Cholesky flop count | 5.1e+08 |
nnz(L+U), no partial pivoting, with AMD | 6,586,902 |
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD | 31,135,581,080 |
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD | 233,125,921,419 |
Note that all matrix statistics (except nonzero pattern symmetry) exclude the 1232776 explicit zero entries.
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.