Matrix properties
number of rows	2,395
number of columns	2,395
nonzeros	13,151
structural full rank?	yes
structural rank	2,395
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	4,168
nonzero pattern symmetry	symmetric
numeric value symmetry	53%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	S. Hamm
editor	T. Davis
date	1991
kind	circuit simulation problem
2D/3D problem?	no

Additional fields	size and type
b	full 2395-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	9,777
Cholesky flop count	7.4e+04
nnz(L+U), no partial pivoting, with AMD	17,159
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	43,284
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	101,299

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 4168 explicit zero entries.

SVD-based statistics:
norm(A)	0.722144
min(svd(A))	5.99434e-05
cond(A)	12047.1
rank(A)	2,395
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.