Matrix properties
number of rows	80,676
number of columns	80,676
nonzeros	4,308,984
structural full rank?	yes
structural rank	80,676
# 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'))	17,773,902	16,701,390
Cholesky flop count	8.7e+09	7.0e+09
nnz(L+U), no partial pivoting	35,467,128	33,322,104
nnz(V) for QR, upper bound nnz(L) for LU	55,571,094	31,314,870
nnz(R) for QR, upper bound nnz(U) for LU	108,089,046	60,350,166

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.