Matrix properties
number of rows	500
number of columns	500
nonzeros	28,726
structural full rank?	yes
structural rank	500
# of blocks from dmperm	37
# strongly connected comp.	37
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	93%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	D.Yang
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	19,344
Cholesky flop count	1.1e+06
nnz(L+U), no partial pivoting, with AMD	38,188
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	38,081
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	106,630

SVD-based statistics:
norm(A)	1.79437e+07
min(svd(A))	0.381116
cond(A)	4.70819e+07
rank(A)	500
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.