Matrix properties
number of rows	9,769
number of columns	9,769
nonzeros	101,635
structural full rank?	yes
structural rank	9,769
# of blocks from dmperm	8
# strongly connected comp.	8
explicit zero entries	110
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 9769-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	153,504
Cholesky flop count	1.0e+07
nnz(L+U), no partial pivoting, with AMD	297,239
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	1,630,571
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	2,709,653

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 110 explicit zero entries.

SVD-based statistics:
norm(A)	47781.9
min(svd(A))	1.00001e-08
cond(A)	4.77816e+12
rank(A)	9,705
sprank(A)-rank(A)	64
null space dimension	64
full numerical rank?	no
singular value gap	2.55344

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.