Matrix properties
number of rows	10,000
number of columns	10,000
nonzeros	49,699
structural full rank?	yes
structural rank	10,000
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	100%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	C. Yang
editor	Z. Bai, D. Day, J. Demmel, J. Dongarra
date	1996
kind	materials problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	204,647
Cholesky flop count	1.2e+07
nnz(L+U), no partial pivoting, with AMD	399,294
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	343,315
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	627,565

SVD-based statistics:
norm(A)	43079
min(svd(A))	1.90366e-15
cond(A)	2.26296e+19
rank(A)	9,999
sprank(A)-rank(A)	1
null space dimension	1
full numerical rank?	no
singular value gap	7.61255e+07

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.