Matrix properties
number of rows	37,762
number of columns	37,762
nonzeros	1,133,641
structural full rank?	yes
structural rank	37,762
# of blocks from dmperm	773
# strongly connected comp.	773
explicit zero entries	28,603
nonzero pattern symmetry	symmetric
numeric value symmetry	28%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	N. Mancktelow
editor	T. Davis
date	2007
kind	materials problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	2,711,148
Cholesky flop count	3.3e+08
nnz(L+U), no partial pivoting, with AMD	5,384,534
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	6,061,883
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	14,916,823

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 28603 explicit zero entries.

SVD-based statistics:
norm(A)	7.41627e+07
min(svd(A))	7.59074e-05
cond(A)	9.77015e+11
rank(A)	37,752
sprank(A)-rank(A)	10
null space dimension	10
full numerical rank?	no
singular value gap	1.23543

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.