Matrix properties
number of rows	60,000
number of columns	60,000
nonzeros	760,154
structural full rank?	yes
structural rank	60,000
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	integer
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	S. Andrews
editor	T. Davis
date	2003
kind	computer graphics/vision problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	117,039,940
Cholesky flop count	5.8e+11
nnz(L+U), no partial pivoting, with AMD	234,019,880
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	241,984,349
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	420,425,913

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.