Matrix properties
number of rows	87,804
number of columns	87,804
nonzeros	5,217,912
structural full rank?	yes
structural rank	87,804
# of blocks from dmperm	2
# strongly connected comp.	2
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	43,083,342
Cholesky flop count	7.1e+10
nnz(L+U), no partial pivoting, with AMD	86,078,880
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	82,954,878
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	166,092,066

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.