Matrix properties
number of rows	33,861
number of columns	33,861
nonzeros	166,453
structural full rank?	yes
structural rank	33,861
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	92%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	L. Zhao
editor	T. Davis
date	2001
kind	electromagnetics problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	3,493,262
Cholesky flop count	1.8e+09
nnz(L+U), no partial pivoting, with AMD	6,952,663
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	8,715,465
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	15,859,097

SVD-based statistics:
norm(A)	2.78277
min(svd(A))	0.00972569
cond(A)	286.126
rank(A)	33,861
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.