Matrix properties
number of rows	2,541
number of columns	2,541
nonzeros	7,361
structural full rank?	yes
structural rank	2,541
# of blocks from dmperm	131
# strongly connected comp.	131
entries not in dmperm blocks	3
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	D. Bates
editor	T. Davis
date	2006
kind	statistical/mathematical problem
2D/3D problem?	no

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	4,951	4,951	4,949
Cholesky flop count	9.8e+03	9.8e+03	9.8e+03
nnz(L+U), no partial pivoting	7,361	7,361	7,360
nnz(V) for QR, upper bound nnz(L) for LU	44,674	20,286	4,949
nnz(R) for QR, upper bound nnz(U) for LU	46,953	46,953	46,954

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.