Matrix properties
number of rows	10
number of columns	10
nonzeros	76
structural full rank?	yes
structural rank	10
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	0
nonzero pattern symmetry	64%
numeric value symmetry	64%
type	binary
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	J. Lewis
editor	I. Duff, R. Grimes, J. Lewis
date	1983
kind	counter-example problem
2D/3D problem?	no

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	55	55
Cholesky flop count	3.8e+02	3.8e+02
nnz(L+U), no partial pivoting	100	100
nnz(V) for QR, upper bound nnz(L) for LU	55	55
nnz(R) for QR, upper bound nnz(U) for LU	55	55

Maintained by Tim Davis, last updated 30-Sep-2008.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.