Matrix properties
number of rows	961
number of columns	961
nonzeros	10,591
structural full rank?	yes
structural rank	961
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	35%
type	complex
structure	symmetric
Cholesky candidate?	no
positive definite?	no

author	S. Gedney and U. Navasariwala
editor	Z. Bai, D. Day, J. Demmel, J. Dongarra
date	1996
kind	electromagnetics problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	17,780
Cholesky flop count	4.6e+05
nnz(L+U), no partial pivoting, with AMD	34,599
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	22,833
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	59,353

SVD-based statistics:
norm(A)	635.09
min(svd(A))	5.66568e-05
cond(A)	1.12094e+07
rank(A)	961
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.