Matrix properties
number of rows	12,992
number of columns	12,992
nonzeros	49,365
structural full rank?	yes
structural rank	12,992
# of blocks from dmperm	1,101
# 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	251,290
Cholesky flop count	2.8e+07
nnz(L+U), no partial pivoting, with AMD	489,588
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	412,191
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	849,776

SVD-based statistics:
norm(A)	4.89134
min(svd(A))	0.00287512
cond(A)	1701.27
rank(A)	12,992
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.