Matrix properties
number of rows	1,700
number of columns	1,700
nonzeros	21,509
structural full rank?	yes
structural rank	1,700
# of blocks from dmperm	83
# strongly connected comp.	83
explicit zero entries	0
nonzero pattern symmetry	52%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	Y. Saad
editor	Y. Saad
date	1996
kind	electromagnetics problem
2D/3D problem?	yes

Additional fields	size and type
b	full 1700-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	57,192
Cholesky flop count	3.1e+06
nnz(L+U), no partial pivoting, with AMD	112,684
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	64,126
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	120,414

SVD-based statistics:
norm(A)	2.55865
min(svd(A))	4.54439e-07
cond(A)	5.63034e+06
rank(A)	1,700
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.