Matrix properties
number of rows	1,473
number of columns	1,473
nonzeros	34,241
structural full rank?	yes
structural rank	1,473
# of blocks from dmperm	9
# strongly connected comp.	9
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	J. Lewis
editor	I. Duff, R. Grimes, J. Lewis
date	1982
kind	duplicate structural problem
2D/3D problem?	yes

Notes:

duplicate of HB/bcsstk11

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	51,271
Cholesky flop count	2.3e+06
nnz(L+U), no partial pivoting, with AMD	101,069
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	55,719
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	109,097

SVD-based statistics:
norm(A)	6.55606e+08
min(svd(A))	2.96406
cond(A)	2.21185e+08
rank(A)	1,473
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.