Matrix properties
number of rows	12,328
number of columns	12,328
nonzeros	301,700
structural full rank?	yes
structural rank	12,328
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	41,128
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	no

author	A. Cote
editor	T. Davis
date	1997
kind	acoustics problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	2,156,718	2,217,991
Cholesky flop count	1.1e+09	1.1e+09
nnz(L+U), no partial pivoting	4,301,108	4,423,654
nnz(V) for QR, upper bound nnz(L) for LU	14,773,580	6,591,780
nnz(R) for QR, upper bound nnz(U) for LU	23,332,909	13,828,352

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 41128 explicit zero entries.

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.