Matrix properties
number of rows	3,792
number of columns	3,792
nonzeros	28,870
structural full rank?	yes
structural rank	3,792
# 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 3792-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	35,826
Cholesky flop count	1.4e+06
nnz(L+U), no partial pivoting, with AMD	67,860
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	229,868
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	482,175

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

SVD-based statistics:
norm(A)	64186.3
min(svd(A))	0.00117461
cond(A)	5.4645e+07
rank(A)	3,792
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.