Matrix properties
number of rows	85
number of columns	85
nonzeros	523
structural full rank?	yes
structural rank	85
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	binary
structure	symmetric
Cholesky candidate?	yes
positive definite?	no

author	V. Askenazi
editor	A. Curtis, I. Duff, J. Reid
date	1974
kind	least squares problem
2D/3D problem?	no

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	505
Cholesky flop count	3.3e+03
nnz(L+U), no partial pivoting, with AMD	925
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	598
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	1,096

SVD-based statistics:
norm(A)	6.72155
min(svd(A))	0.014494
cond(A)	463.746
rank(A)	85
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.