Matrix properties
number of rows	17,758
number of columns	17,758
nonzeros	99,147
structural full rank?	yes
structural rank	17,758
# of blocks from dmperm	23
# strongly connected comp.	23
explicit zero entries	27,003
nonzero pattern symmetry	symmetric
numeric value symmetry	50%
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 17758-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	70,192
Cholesky flop count	8.3e+05
nnz(L+U), no partial pivoting, with AMD	122,626
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	3,843,500
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	8,431,920

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 27003 explicit zero entries.

SVD-based statistics:
norm(A)	1.49485
min(svd(A))	1.1549e-05
cond(A)	129436
rank(A)	17,758
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.