Matrix properties
number of rows	62
number of columns	62
nonzeros	342
structural full rank?	yes
structural rank	62
# 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	288
Cholesky flop count	1.5e+03
nnz(L+U), no partial pivoting, with AMD	514
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	321
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	589

SVD-based statistics:
norm(A)	0.000175772
min(svd(A))	1.02195e-05
cond(A)	17.1996
rank(A)	62
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.