Matrix properties
number of rows	4,929
number of columns	10,595
nonzeros	46,591
structural full rank?	yes
structural rank	4,929
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	778
nonzero pattern symmetry	0%
numeric value symmetry	0%
type	real
structure	rectangular
Cholesky candidate?	no
positive definite?	no

author	R. Burchett
editor	I. Duff, R. Grimes, J. Lewis
date	1984
kind	power network problem
2D/3D problem?	no

Ordering statistics:	result
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	1,307,750
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	99,257

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 778 explicit zero entries.

SVD-based statistics:
norm(A)	23446.1
min(svd(A))	0.000199431
cond(A)	1.17565e+08
rank(A)	4,929
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.