Matrix properties
number of rows	43,164
number of columns	43,164
nonzeros	2,571,768
structural full rank?	yes
structural rank	43,164
# 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'))	18,274,158	11,259,162
Cholesky flop count	2.2e+10	6.8e+09
nnz(L+U), no partial pivoting	36,505,152	22,475,160
nnz(V) for QR, upper bound nnz(L) for LU	49,496,706	19,141,920
nnz(R) for QR, upper bound nnz(U) for LU	95,004,414	36,722,718

Maintained by Tim Davis, last updated 30-Sep-2008.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.