Matrix properties
number of rows	66
number of columns	66
nonzeros	4,356
structural full rank?	yes
structural rank	66
# 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	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
nnz(chol(P*(A+A'+s*I)*P'))	2,211	2,211
Cholesky flop count	9.8e+04	9.8e+04
nnz(L+U), no partial pivoting	4,356	4,356
nnz(V) for QR, upper bound nnz(L) for LU	2,211	2,211
nnz(R) for QR, upper bound nnz(U) for LU	2,211	2,211

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.