Matrix properties
number of rows	26,064
number of columns	26,064
nonzeros	177,168
structural full rank?	yes
structural rank	26,064
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	98%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	S. Wang
editor	T. Davis
date	1994
kind	semiconductor device problem
2D/3D problem?	yes

Additional fields	size and type
b	full 26064-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	5,378,945
Cholesky flop count	4.8e+09
nnz(L+U), no partial pivoting, with AMD	10,731,826
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	12,525,026
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	21,574,595

SVD-based statistics:
norm(A)	0.268008
min(svd(A))	4.331e-05
cond(A)	6188.12
rank(A)	26,064
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.