Matrix properties
number of rows	10,581
number of columns	10,581
nonzeros	770,811
structural full rank?	yes
structural rank	10,581
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	90
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	M. Lourakis
editor	T. Davis
date	2006
kind	computer graphics/vision problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	460,630
Cholesky flop count	3.9e+07
nnz(L+U), no partial pivoting, with AMD	910,679
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	3,811,882
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	38,413,165

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 90 explicit zero entries.

SVD-based statistics:
norm(A)	6.429e+12
min(svd(A))	6.40186e+09
cond(A)	1004.24
rank(A)	10,581
sprank(A)-rank(A)	0
null space dimension	0
full numerical rank?	yes

singular values (MAT file):	click here
SVD method used:	s = svd (full (A)) ;
status:	ok

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.