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

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.