Matrix properties
number of rows	2,169
number of columns	2,169
nonzeros	15,145
structural full rank?	yes
structural rank	2,169
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	no
positive definite?	no

author	IBM
editor	O. Schenk
date	2006
kind	optimization problem
2D/3D problem?	no

Additional fields	size and type
b	full 2169-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	16,495
Cholesky flop count	3.5e+05
nnz(L+U), no partial pivoting, with AMD	30,821
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	43,316
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	92,791

SVD-based statistics:
norm(A)	641045
min(svd(A))	0.00264599
cond(A)	2.42271e+08
rank(A)	2,169
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.