Matrix properties
number of rows	3,060
number of columns	3,060
nonzeros	42,211
structural full rank?	yes
structural rank	3,060
# 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 3060-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	151,592
Cholesky flop count	1.3e+07
nnz(L+U), no partial pivoting, with AMD	300,124
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	196,452
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	365,373

SVD-based statistics:
norm(A)	2.60644
min(svd(A))	1.3525e-07
cond(A)	1.92713e+07
rank(A)	3,060
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.