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
entries not in dmperm blocks	0
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:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	416,577	526,165	416,577
Cholesky flop count	1.4e+07	2.3e+07	1.4e+07
nnz(L+U), no partial pivoting	815,793	1,034,969	815,793
nnz(V) for QR, upper bound nnz(L) for LU	790,960	925,965	675,816
nnz(R) for QR, upper bound nnz(U) for LU	2,079,132	2,241,193	1,626,534

Maintained by Tim Davis, last updated 04-May-2008.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.