Matrix properties
number of rows	2,534
number of columns	2,534
nonzeros	463,360
structural full rank?	yes
structural rank	2,534
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	0%
type	complex
structure	symmetric
Cholesky candidate?	no
positive definite?	no

author	S. Chu
editor	Z. Bai, D. Day, J. Demmel, J. Dongarra
date	1991
kind	electromagnetics problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	444,717	645,216
Cholesky flop count	8.0e+07	1.9e+08
nnz(L+U), no partial pivoting	886,900	1,287,898
nnz(V) for QR, upper bound nnz(L) for LU	473,112	789,575
nnz(R) for QR, upper bound nnz(U) for LU	858,144	1,313,931

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.