Matrix properties
number of rows	33,960
number of columns	33,960
nonzeros	1,583,640
structural full rank?	yes
structural rank	33,960
# 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	P. Chen
editor	T. Davis
date	2002
kind	structural problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	5,345,736	4,707,240
Cholesky flop count	2.0e+09	1.3e+09
nnz(L+U), no partial pivoting	10,657,512	9,380,520
nnz(V) for QR, upper bound nnz(L) for LU	16,244,226	7,649,628
nnz(R) for QR, upper bound nnz(U) for LU	31,889,580	14,508,168

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.