Matrix properties
number of rows	1,089
number of columns	1,089
nonzeros	3,895
structural full rank?	yes
structural rank	1,089
# of blocks from dmperm	249
# strongly connected comp.	1
entries not in dmperm blocks	398
explicit zero entries	333
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'))	85,194	83,329	6,245
Cholesky flop count	1.7e+07	1.4e+07	5.4e+04
nnz(L+U), no partial pivoting	169,299	165,569	11,799
nnz(V) for QR, upper bound nnz(L) for LU	3,895	5,929	4,252
nnz(R) for QR, upper bound nnz(U) for LU	9,864	13,147	9,429

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 333 explicit zero entries.

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.