Matrix properties
number of rows	20,360
number of columns	20,360
nonzeros	20,360
structural full rank?	yes
structural rank	20,360
# of blocks from dmperm	20,360
# strongly connected comp.	20,360
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	E. Rudnyi
editor	E. Rudnyi
date	2004
kind	duplicate model reduction problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	20,360
Cholesky flop count	2.0e+04
nnz(L+U), no partial pivoting, with AMD	20,360
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	20,360
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	20,360

SVD-based statistics:
norm(A)	2.16377e-06
min(svd(A))	3.5875e-10
cond(A)	6031.42
rank(A)	20,360
sprank(A)-rank(A)	0
null space dimension	0
full numerical rank?	yes

singular values (MAT file):	click here
SVD method used:	s = sort (abs(full(diag(A))),'descend') ; since A is diagonal
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.