Matrix properties
number of rows	22,967
number of columns	22,967
nonzeros	87,760
structural full rank?	yes
structural rank	22,967
# of blocks from dmperm	1,437
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	no
positive definite?	no

author	M. Tuma
editor	N. Gould, Y. Hu, J. Scott
date	2004
kind	2D/3D problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	694,734
Cholesky flop count	1.5e+08
nnz(L+U), no partial pivoting, with AMD	1,366,501
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	1,261,810
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	2,523,723

SVD-based statistics:
norm(A)	4.89134
min(svd(A))	0.0015955
cond(A)	3065.71
rank(A)	22,967
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.