Matrix properties
number of rows	113
number of columns	113
nonzeros	655
structural full rank?	yes
structural rank	113
# of blocks from dmperm	18
# strongly connected comp.	18
explicit zero entries	0
nonzero pattern symmetry	6%
numeric value symmetry	6%
type	binary
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	W. Gentleman
editor	A. Curtis, I. Duff, J. Reid
date	1973
kind	statistical/mathematical problem
2D/3D problem?	no

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	1,003
Cholesky flop count	1.2e+04
nnz(L+U), no partial pivoting, with AMD	1,893
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	519
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	1,433

SVD-based statistics:
norm(A)	11.3192
min(svd(A))	1.9093e-17
cond(A)	5.92844e+17
rank(A)	107
sprank(A)-rank(A)	6
null space dimension	6
full numerical rank?	no
singular value gap	7.16325e+13

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.