Matrix properties
number of rows	35,543
number of columns	35,543
nonzeros	128,115
structural full rank?	yes
structural rank	35,543
# 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	N. Gould
editor	N. Gould
date	1994
kind	2D/3D problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	923,509
Cholesky flop count	3.0e+08
nnz(L+U), no partial pivoting, with AMD	1,811,475
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	6,562,149
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	11,649,713

SVD-based statistics:
norm(A)	2.50594e+08
min(svd(A))	1.33519e-07
cond(A)	1.87684e+15
rank(A)	28,387
sprank(A)-rank(A)	7,156
null space dimension	7,156
full numerical rank?	no
singular value gap	1.00138

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.