Matrix: Hamm/hcircuit
Description: Steve Hamm, Motorola. Circuit w/no parasitics (Steve.Hamm@motorola.com)
(bipartite graph drawing) | (graph drawing of A+A') |
Matrix properties | |
number of rows | 105,676 |
number of columns | 105,676 |
nonzeros | 513,072 |
structural full rank? | yes |
structural rank | 105,676 |
# of blocks from dmperm | 1,420 |
# strongly connected comp. | 1,359 |
explicit zero entries | 0 |
nonzero pattern symmetry | 100% |
numeric value symmetry | 20% |
type | real |
structure | unsymmetric |
Cholesky candidate? | no |
positive definite? | no |
author | S. Hamm |
editor | T. Davis |
date | 2001 |
kind | circuit simulation problem |
2D/3D problem? | no |
Additional fields | size and type |
b | full 105676-by-1 |
Ordering statistics: | result |
nnz(chol(P*(A+A'+s*I)*P')) with AMD | 368,316 |
Cholesky flop count | 1.7e+06 |
nnz(L+U), no partial pivoting, with AMD | 630,956 |
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD | 3,433,900 |
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD | 10,042,058 |
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.