Matrix properties
number of rows	23,196
number of columns	23,196
nonzeros	203,048
structural full rank?	yes
structural rank	23,196
# of blocks from dmperm	2
# strongly connected comp.	2
explicit zero entries	2
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 23196-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	633,863
Cholesky flop count	1.4e+08
nnz(L+U), no partial pivoting, with AMD	1,244,530
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	21,470,795
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	29,113,928

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 2 explicit zero entries.

SVD-based statistics:
norm(A)	5303.47
min(svd(A))	0.00137391
cond(A)	3.86012e+06
rank(A)	23,196
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.