Matrix properties
number of rows	6,001
number of columns	6,001
nonzeros	2,269,500
structural full rank?	yes
structural rank	6,001
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	1
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	no
positive definite?	no

author	S. Wright
editor	N. Gould, Y. Hu, J. Scott
date	2004
kind	optimization problem
2D/3D problem?	no

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	1,139,251
Cholesky flop count	1.1e+09
nnz(L+U), no partial pivoting, with AMD	2,272,501
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	1,139,251
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	5,640,751

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 1 explicit zero entries.

SVD-based statistics:
norm(A)	3.69566e+08
min(svd(A))	0.000348605
cond(A)	1.06013e+12
rank(A)	6,000
sprank(A)-rank(A)	1
null space dimension	1
full numerical rank?	no
singular value gap	1.14103

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.