Matrix properties
number of rows	400
number of columns	400
nonzeros	2,860
structural full rank?	yes
structural rank	400
# of blocks from dmperm	2
# strongly connected comp.	2
entries not in dmperm blocks	0
explicit zero entries	0
nonzero pattern symmetry	99%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	J. Cullum
editor	Z. Bai, D. Day, J. Demmel, J. Dongarra
date	1986
kind	2D/3D problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	1,648	2,003	1,648
Cholesky flop count	7.8e+03	1.2e+04	7.8e+03
nnz(L+U), no partial pivoting	2,896	3,606	2,896
nnz(V) for QR, upper bound nnz(L) for LU	1,667	1,715	1,672
nnz(R) for QR, upper bound nnz(U) for LU	2,776	2,851	2,776

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.