Matrix properties
number of rows	11,125
number of columns	11,125
nonzeros	123,659
structural full rank?	yes
structural rank	11,125
# of blocks from dmperm	9
# strongly connected comp.	9
explicit zero entries	16
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 11125-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	112,282
Cholesky flop count	4.0e+06
nnz(L+U), no partial pivoting, with AMD	213,439
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	5,138,165
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	9,821,533

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 16 explicit zero entries.

SVD-based statistics:
norm(A)	65289.6
min(svd(A))	7.12668e-05
cond(A)	9.16128e+08
rank(A)	11,125
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.