Matrix properties
number of rows	3,268
number of columns	3,268
nonzeros	20,963
structural full rank?	yes
structural rank	3,268
# of blocks from dmperm	3,037
# strongly connected comp.	1
entries not in dmperm blocks	16,718
explicit zero entries	6,873
nonzero pattern symmetry	1%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	Bayer
editor	F. Grund
date	1997
kind	chemical process simulation problem
2D/3D problem?	no

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	614,071	485,196	4,552
Cholesky flop count	3.9e+08	1.8e+08	1.4e+04
nnz(L+U), no partial pivoting	1,224,874	967,124	22,554
nnz(V) for QR, upper bound nnz(L) for LU	101,534	105,366	6,614
nnz(R) for QR, upper bound nnz(U) for LU	196,682	228,519	25,364

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 6873 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.