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
entries not in dmperm blocks	0
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:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	117,039,940	36,595,274
Cholesky flop count	5.8e+11	5.2e+10
nnz(L+U), no partial pivoting	234,019,880	73,130,548
nnz(V) for QR, upper bound nnz(L) for LU	241,984,349	82,685,669
nnz(R) for QR, upper bound nnz(U) for LU	420,425,913	159,203,547

Maintained by Tim Davis, last updated 04-May-2008.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.