Matrix properties
number of rows	2,961
number of columns	2,961
nonzeros	14,585
structural full rank?	yes
structural rank	2,961
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	50%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	H. Elman
editor	Z. Bai, D. Day, J. Demmel, J. Dongarra
date	1982
kind	2D/3D problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	42,520
Cholesky flop count	1.3e+06
nnz(L+U), no partial pivoting, with AMD	82,079
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	76,173
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	139,274

SVD-based statistics:
norm(A)	10.3783
min(svd(A))	0.0161532
cond(A)	642.493
rank(A)	2,961
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.