Matrix properties
number of rows	2,500
number of columns	2,500
nonzeros	12,349
structural full rank?	yes
structural rank	2,500
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	0
nonzero pattern symmetry	99%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	C. Yang
editor	Z. Bai, D. Day, J. Demmel, J. Dongarra
date	1996
kind	materials problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	35,865	37,381
Cholesky flop count	1.0e+06	1.1e+06
nnz(L+U), no partial pivoting	69,230	72,262
nnz(V) for QR, upper bound nnz(L) for LU	61,659	63,100
nnz(R) for QR, upper bound nnz(U) for LU	112,569	116,423

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.