Matrix properties
number of rows	16,146
number of columns	16,146
nonzeros	1,015,156
structural full rank?	yes
structural rank	16,146
# 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?	yes
positive definite?	yes

author	H. Simon
editor	H. Simon
date	1993
kind	structural problem
2D/3D problem?	yes

Additional fields	size and type
b	full 16146-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	3,095,636
Cholesky flop count	1.1e+09
nnz(L+U), no partial pivoting, with AMD	6,175,126
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	3,459,709
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	7,347,770

SVD-based statistics:
norm(A)	9.4787e+11
min(svd(A))	1.24542
cond(A)	7.61085e+11
rank(A)	16,145
sprank(A)-rank(A)	1
null space dimension	1
full numerical rank?	no
singular value gap	2.18987

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.