Matrix properties
number of rows	1,813
number of columns	1,813
nonzeros	11,245
structural full rank?	yes
structural rank	1,813
# of blocks from dmperm	469
# strongly connected comp.	6
explicit zero entries	0
nonzero pattern symmetry	65%
numeric value symmetry	1%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	R. Hoekstra
editor	T. Davis
date	2003
kind	subsequent circuit simulation problem
2D/3D problem?	no

Notes:

next: Sandia/adder_dcop_20 first: Sandia/init_adder1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	12,438
Cholesky flop count	1.0e+05
nnz(L+U), no partial pivoting, with AMD	23,063
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	223,330
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	992,179

SVD-based statistics:
norm(A)	1.25227
min(svd(A))	2.10837e-12
cond(A)	5.93954e+11
rank(A)	1,813
sprank(A)-rank(A)	0
null space dimension	0
full numerical rank?	yes

singular values (MAT file):	click here
SVD method used:	s = svd (full (A)) ;
status:	ok

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.