Matrix properties
number of rows	1,074
number of columns	1,074
nonzeros	12,960
structural full rank?	yes
structural rank	1,074
# of blocks from dmperm	4
# strongly connected comp.	4
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	J. Lewis
editor	I. Duff, R. Grimes, J. Lewis
date	1982
kind	structural problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	31,153	33,442	31,153
Cholesky flop count	1.8e+06	2.0e+06	1.8e+06
nnz(L+U), no partial pivoting	61,232	65,810	61,232
nnz(V) for QR, upper bound nnz(L) for LU	193,893	132,712	143,124
nnz(R) for QR, upper bound nnz(U) for LU	280,778	269,637	278,373

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.