Matrix properties
number of rows	760
number of columns	760
nonzeros	5,739
structural full rank?	yes
structural rank	760
# of blocks from dmperm	17
# strongly connected comp.	17
explicit zero entries	237
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	2D/3D problem sequence
2D/3D problem?	yes

Notes:

next: HB/fs_760_2 first: HB/fs_760_1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	14,263
Cholesky flop count	3.8e+05
nnz(L+U), no partial pivoting, with AMD	27,766
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	19,199
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	35,804

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 237 explicit zero entries.

SVD-based statistics:
norm(A)	3.09861e+08
min(svd(A))	56476.6
cond(A)	5486.53
rank(A)	760
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.