Matrix properties
number of rows	9,801
number of columns	9,801
nonzeros	87,025
structural full rank?	yes
structural rank	9,801
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	69%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	R. Kouhia
editor	T. Davis
date	2008
kind	structural problem sequence
2D/3D problem?	yes

Additional fields	size and type
b	full 9801-by-1
A	cell 45-by-1
b	cell 45-by-1

Notes:

Matrix sequence from Reijo Kouhia, Structural Mechanics, Helsinki  
University of Technology.   http://users.tkk.fi/~kouhia/sparse.html

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	310,926
Cholesky flop count	2.2e+07
nnz(L+U), no partial pivoting, with AMD	612,051
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	506,007
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	954,787

SVD-based statistics:
norm(A)	4.35807
min(svd(A))	0.00197329
cond(A)	2208.53
rank(A)	9,801
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.