Matrix properties
number of rows	87
number of columns	87
nonzeros	232
structural full rank?	yes
structural rank	87
# of blocks from dmperm	17
# strongly connected comp.	1
entries not in dmperm blocks	21
explicit zero entries	6
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

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	927	949	301
Cholesky flop count	1.5e+04	1.5e+04	1.3e+03
nnz(L+U), no partial pivoting	1,767	1,811	536
nnz(V) for QR, upper bound nnz(L) for LU	238	259	228
nnz(R) for QR, upper bound nnz(U) for LU	435	466	418

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 6 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.