Matrix properties
number of rows	782
number of columns	782
nonzeros	7,514
structural full rank?	yes
structural rank	782
# of blocks from dmperm	2
# strongly connected comp.	2
entries not in dmperm blocks	42
explicit zero entries	0
nonzero pattern symmetry	99%
numeric value symmetry	96%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	B. Schultz, S. Gedney
editor	Z. Bai, D. Day, J. Demmel, J. Dongarra
date	1994
kind	electromagnetics problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	10,824	12,716	10,606
Cholesky flop count	1.9e+05	2.8e+05	1.8e+05
nnz(L+U), no partial pivoting	20,866	24,650	20,472
nnz(V) for QR, upper bound nnz(L) for LU	12,794	16,652	14,770
nnz(R) for QR, upper bound nnz(U) for LU	30,479	39,534	31,510

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.