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

For a description of the statistics displayed above, click here.

Maintained by Tim Davis, last updated 12-Mar-2014.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.