Matrix properties
number of rows	8,192
number of columns	8,192
nonzeros	41,746
structural full rank?	yes
structural rank	8,192
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	0
nonzero pattern symmetry	96%
numeric value symmetry	92%
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'))	212,151	204,999
Cholesky flop count	1.9e+07	1.6e+07
nnz(L+U), no partial pivoting	416,110	401,806
nnz(V) for QR, upper bound nnz(L) for LU	378,664	377,446
nnz(R) for QR, upper bound nnz(U) for LU	688,903	690,504

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.