Matrix properties
number of rows	4,098
number of columns	4,098
nonzeros	72,356
structural full rank?	yes
structural rank	4,098
# 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	F. Cannizzo
editor	T. Davis
date	2004
kind	structural problem
2D/3D problem?	yes

Additional fields	size and type
b	sparse 4098-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	138,352
Cholesky flop count	7.0e+06
nnz(L+U), no partial pivoting, with AMD	272,606
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	1,307,076
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	2,075,462

SVD-based statistics:
norm(A)	3.07103e+08
min(svd(A))	1.41465
cond(A)	2.17087e+08
rank(A)	4,098
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.