Matrix properties
number of rows	398
number of columns	398
nonzeros	2,910
structural full rank?	yes
structural rank	398
# of blocks from dmperm	2
# strongly connected comp.	2
entries not in dmperm blocks	0
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
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'))	3,856	4,458	3,856
Cholesky flop count	4.5e+04	6.4e+04	4.5e+04
nnz(L+U), no partial pivoting	7,314	8,518	7,314
nnz(V) for QR, upper bound nnz(L) for LU	5,034	5,706	5,360
nnz(R) for QR, upper bound nnz(U) for LU	10,604	11,506	10,413

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.