Matrix properties
number of rows	87
number of columns	87
nonzeros	230
structural full rank?	yes
structural rank	87
# of blocks from dmperm	19
# strongly connected comp.	1
entries not in dmperm blocks	24
explicit zero entries	8
nonzero pattern symmetry	8%
numeric value symmetry	2%
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 87-by-1

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	917	949	289
Cholesky flop count	1.4e+04	1.5e+04	1.2e+03
nnz(L+U), no partial pivoting	1,747	1,811	515
nnz(V) for QR, upper bound nnz(L) for LU	239	259	226
nnz(R) for QR, upper bound nnz(U) for LU	431	465	408

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 8 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.