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
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:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	17,773,902
Cholesky flop count	8.7e+09
nnz(L+U), no partial pivoting, with AMD	35,467,128
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	55,571,094
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	108,089,046

Maintained by Tim Davis, last updated 01-Apr-2011.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.