Matrix properties
number of rows	35,543
number of columns	35,543
nonzeros	128,115
structural full rank?	yes
structural rank	35,543
# of blocks from dmperm	2
# strongly connected comp.	2
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?	no

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

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	923,509	1,057,586	2,956,674
Cholesky flop count	3.0e+08	2.9e+08	1.3e+09
nnz(L+U), no partial pivoting	1,811,475	2,079,629	5,877,805
nnz(V) for QR, upper bound nnz(L) for LU	6,562,149	3,589,806	3,327,875
nnz(R) for QR, upper bound nnz(U) for LU	11,649,713	6,784,750	6,295,074

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.