Matrix properties
number of rows	1,477
number of columns	1,477
nonzeros	18,427
structural full rank?	yes
structural rank	1,477
# of blocks from dmperm	298
# strongly connected comp.	21
entries not in dmperm blocks	2,195
explicit zero entries	165
nonzero pattern symmetry	1%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	J. Mallya
editor	T. Davis
date	1994
kind	chemical process simulation problem
2D/3D problem?	no

Additional fields	size and type
b	full 1477-by-1

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	224,006	189,147	39,833
Cholesky flop count	8.0e+07	4.5e+07	2.3e+06
nnz(L+U), no partial pivoting	446,535	376,817	80,384
nnz(V) for QR, upper bound nnz(L) for LU	34,018	41,657	24,874
nnz(R) for QR, upper bound nnz(U) for LU	76,074	93,249	54,389

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 165 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.