Matrix properties
number of rows	2,025
number of columns	2,025
nonzeros	100,015
structural full rank?	yes
structural rank	2,025
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	3%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	K. Meerbergen
editor	E. Rudnyi
date	2006
kind	model reduction problem
2D/3D problem?	yes

Additional fields	size and type
M	sparse 2025-by-2025
B	sparse 2025-by-1
E	sparse 2025-by-2025

Notes:

Primary matrix in this model reduction problem is the Oberwolfach K matrix

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	68,442	93,675
Cholesky flop count	2.6e+06	4.9e+06
nnz(L+U), no partial pivoting	134,859	185,325
nnz(V) for QR, upper bound nnz(L) for LU	98,633	111,389
nnz(R) for QR, upper bound nnz(U) for LU	178,993	191,992

Maintained by Tim Davis, last updated 30-Sep-2008.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.