Matrix properties
number of rows	760
number of columns	760
nonzeros	5,816
structural full rank?	yes
structural rank	760
# of blocks from dmperm	17
# strongly connected comp.	17
explicit zero entries	160
nonzero pattern symmetry	65%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	A. Curtis
editor	I. Duff, R. Grimes, J. Lewis
date	1983
kind	subsequent 2D/3D problem
2D/3D problem?	yes

Notes:

next: - first: HB/fs_760_1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	14,455
Cholesky flop count	3.9e+05
nnz(L+U), no partial pivoting, with AMD	28,150
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	18,178
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	34,184

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 160 explicit zero entries.

SVD-based statistics:
norm(A)	3.09787e+08
min(svd(A))	3.11917e-12
cond(A)	9.93172e+19
rank(A)	381
sprank(A)-rank(A)	379
null space dimension	379
full numerical rank?	no
singular value gap	1.1497

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.