Matrix: Rajat/rajat28
Description: Rajat/rajat28 circuit simulation matrix
(bipartite graph drawing) | (graph drawing of A+A') |
Matrix properties | |
number of rows | 87,190 |
number of columns | 87,190 |
nonzeros | 606,489 |
structural full rank? | yes |
structural rank | 87,190 |
# of blocks from dmperm | 3,495 |
# strongly connected comp. | 1,178 |
explicit zero entries | 746 |
nonzero pattern symmetry | 99% |
numeric value symmetry | 11% |
type | real |
structure | unsymmetric |
Cholesky candidate? | no |
positive definite? | no |
author | Rajat |
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 | 1,137,954 |
Cholesky flop count | 3.0e+08 |
nnz(L+U), no partial pivoting, with AMD | 2,188,718 |
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD | 612,314,621 |
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD | 1,261,079,638 |
Note that all matrix statistics (except nonzero pattern symmetry) exclude the 746 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.