Matrix properties
number of rows	13,965
number of columns	13,965
nonzeros	322,905
structural full rank?	yes
structural rank	13,965
# of blocks from dmperm	3
# strongly connected comp.	3
entries not in dmperm blocks	0
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	R. Grimes
editor	T. Davis
date	1995
kind	materials problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	2,285,538	1,441,360	1,426,281
Cholesky flop count	7.2e+08	2.2e+08	2.2e+08
nnz(L+U), no partial pivoting	4,557,111	2,868,755	2,838,597
nnz(V) for QR, upper bound nnz(L) for LU	3,002,877	2,052,827	2,132,067
nnz(R) for QR, upper bound nnz(U) for LU	5,438,616	3,915,832	4,056,855

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.