Matrix properties
number of rows	53
number of columns	53
nonzeros	144
structural full rank?	yes
structural rank	53
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	5
nonzero pattern symmetry	4%
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 53-by-1

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	474	493
Cholesky flop count	5.5e+03	5.8e+03
nnz(L+U), no partial pivoting	895	933
nnz(V) for QR, upper bound nnz(L) for LU	139	153
nnz(R) for QR, upper bound nnz(U) for LU	255	285

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 5 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.