Matrix properties
number of rows	8,205
number of columns	8,205
nonzeros	125,567
structural full rank?	yes
structural rank	8,205
# 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	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	W. Eversman, D. Okunbor
editor	T. Davis
date	2001
kind	acoustics problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	289,180	320,831
Cholesky flop count	1.7e+07	1.9e+07
nnz(L+U), no partial pivoting	570,155	633,457
nnz(V) for QR, upper bound nnz(L) for LU	517,970	542,597
nnz(R) for QR, upper bound nnz(U) for LU	1,234,184	1,225,552

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.