Matrix properties
number of rows	38,434
number of columns	38,434
nonzeros	204,912
structural full rank?	yes
structural rank	38,434
# of blocks from dmperm	312
# strongly connected comp.	312
explicit zero entries	1,244
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	no
positive definite?	no

author
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	415,067
Cholesky flop count	1.8e+07
nnz(L+U), no partial pivoting, with AMD	791,700
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	1,193,383
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	2,904,746

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 1244 explicit zero entries.

SVD-based statistics:
norm(A)	2.6078
min(svd(A))	0.000139406
cond(A)	18706.5
rank(A)	38,434
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.