Matrix properties
number of rows	17,361
number of columns	17,361
nonzeros	340,431
structural full rank?	yes
structural rank	17,361
# of blocks from dmperm	3
# strongly connected comp.	3
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	D. Billger
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	416,577
Cholesky flop count	1.4e+07
nnz(L+U), no partial pivoting, with AMD	815,793
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	790,960
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	2,079,132

SVD-based statistics:
norm(A)	1.88769e-07
min(svd(A))	7.53874e-14
cond(A)	2.50398e+06
rank(A)	17,361
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.