Matrix properties
number of rows	36,000
number of columns	36,000
nonzeros	14,220,946
structural full rank?	yes
structural rank	36,000
# 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?	yes
positive definite?	yes

author	author unknown
editor	T. Davis
date	2003
kind	2D/3D problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	160,627,641
Cholesky flop count	1.0e+12
nnz(L+U), no partial pivoting, with AMD	321,219,282
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	156,052,130
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	315,748,711

SVD-based statistics:
norm(A)	138.228
min(svd(A))	1.0387e-05
cond(A)	1.33078e+07
rank(A)	36,000
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.