Matrix properties
number of rows	7,548
number of columns	7,548
nonzeros	834,222
structural full rank?	yes
structural rank	7,548
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	14,331
nonzero pattern symmetry	76%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	D. Smith
editor	T. Davis
date	2006
kind	electromagnetics problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	1,441,448
Cholesky flop count	4.6e+08
nnz(L+U), no partial pivoting, with AMD	2,875,348
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	2,567,452
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	6,715,099

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 14331 explicit zero entries.

SVD-based statistics:
norm(A)	2.8329e+09
min(svd(A))	0.000590518
cond(A)	4.79731e+12
rank(A)	7,547
sprank(A)-rank(A)	1
null space dimension	1
full numerical rank?	no
singular value gap	6.66485

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.