Matrix properties
number of rows	1,089
number of columns	1,089
nonzeros	4,144
structural full rank?	yes
structural rank	1,089
# of blocks from dmperm	164
# strongly connected comp.	1
entries not in dmperm blocks	233
explicit zero entries	120
nonzero pattern symmetry	1%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

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

Additional fields	size and type
b	full 1089-by-1

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	93,882	84,682	6,982
Cholesky flop count	2.1e+07	1.4e+07	6.2e+04
nnz(L+U), no partial pivoting	186,675	168,275	13,108
nnz(V) for QR, upper bound nnz(L) for LU	4,316	6,953	4,938
nnz(R) for QR, upper bound nnz(U) for LU	10,855	15,306	10,890

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 120 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.