Matrix properties
number of rows	10,605
number of columns	10,605
nonzeros	522,387
structural full rank?	yes
structural rank	10,605
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	64%
numeric value symmetry	0%
type	complex
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	D. Bindel
editor	T. Davis
date	2006
kind	thermal problem
2D/3D problem?	yes

Additional fields	size and type
w0	full 1-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	510,205
Cholesky flop count	2.6e+07
nnz(L+U), no partial pivoting, with AMD	1,009,805
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	588,841
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	2,028,390

SVD-based statistics:
norm(A)	2.22515e+12
min(svd(A))	2.7028e-09
cond(A)	8.23275e+20
rank(A)	6,363
sprank(A)-rank(A)	4,242
null space dimension	4,242
full numerical rank?	no
singular value gap	27.3568

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.