Matrix properties
number of rows	24,300
number of columns	24,300
nonzeros	69,984
structural full rank?	no
structural rank	11,664
# of blocks from dmperm	2
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	integer
structure	symmetric
Cholesky candidate?	yes
positive definite?	no

author	N. Gould
editor	N. Gould
date	1994
kind	2D/3D problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	552,302	670,685
Cholesky flop count	1.4e+08	1.5e+08
nnz(L+U), no partial pivoting	1,080,304	1,317,070
nnz(V) for QR, upper bound nnz(L) for LU	8,584,109	7,476,885
nnz(R) for QR, upper bound nnz(U) for LU	2,494,046	1,869,851

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.