Matrix properties
number of rows	782
number of columns	782
nonzeros	5,982
structural full rank?	yes
structural rank	782
# of blocks from dmperm	2
# strongly connected comp.	2
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	no
positive definite?	no

author	B. Schultz, S. Gedney
editor	Z. Bai, D. Day, J. Demmel, J. Dongarra
date	1994
kind	electromagnetics problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	10,052
Cholesky flop count	1.7e+05
nnz(L+U), no partial pivoting, with AMD	19,322
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	13,066
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	28,419

SVD-based statistics:
norm(A)	2.3474e-05
min(svd(A))	1.29888e-06
cond(A)	18.0724
rank(A)	782
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.