Matrix properties
number of rows	2,048
number of columns	2,048
nonzeros	10,114
structural full rank?	yes
structural rank	2,048
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	0
nonzero pattern symmetry	98%
numeric value symmetry	95%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	H. Dong
editor	Z. Bai, D. Day, J. Demmel, J. Dongarra
date	1993
kind	electromagnetics problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	30,370	34,353
Cholesky flop count	1.1e+06	1.3e+06
nnz(L+U), no partial pivoting	58,692	66,658
nnz(V) for QR, upper bound nnz(L) for LU	45,515	55,085
nnz(R) for QR, upper bound nnz(U) for LU	82,538	100,883

Maintained by Tim Davis, last updated 04-May-2008.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.