Matrix properties
number of rows	22,098
number of columns	22,098
nonzeros	1,935,324
structural full rank?	yes
structural rank	22,098
# 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	binary
structure	symmetric
Cholesky candidate?	yes
positive definite?	no

author	C. Damhaug
editor	N. Gould, Y. Hu, J. Scott
date	2004
kind	structural problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	1,708,287	2,086,971
Cholesky flop count	1.6e+08	2.8e+08
nnz(L+U), no partial pivoting	3,394,476	4,151,844
nnz(V) for QR, upper bound nnz(L) for LU	7,074,375	3,462,219
nnz(R) for QR, upper bound nnz(U) for LU	21,764,103	8,681,307

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.