Matrix properties
number of rows	30,004
number of columns	30,004
nonzeros	150,009
structural full rank?	yes
structural rank	30,004
# of blocks from dmperm	1
# 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	J. Blowey
editor	N. Gould
date	1992
kind	materials problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	110,009
Cholesky flop count	4.1e+05
nnz(L+U), no partial pivoting, with AMD	190,014
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	110,008
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	150,155,011

SVD-based statistics:
norm(A)	100.098
min(svd(A))	9.02584e-20
cond(A)	1.10901e+21
rank(A)	20,050
sprank(A)-rank(A)	9,954
null space dimension	9,954
full numerical rank?	no
singular value gap	1.08926

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.