Matrix properties
number of rows	2,903
number of columns	2,903
nonzeros	19,093
structural full rank?	yes
structural rank	2,903
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	81%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

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

Notes:

next: Wang/wang2 first: Wang/wang1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	166,721
Cholesky flop count	2.7e+07
nnz(L+U), no partial pivoting, with AMD	330,539
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	330,098
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	590,936

SVD-based statistics:
norm(A)	4.13808
min(svd(A))	0.000203615
cond(A)	20323
rank(A)	2,903
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.