Matrix properties
number of rows	4,101
number of columns	4,101
nonzeros	82,682
structural full rank?	yes
structural rank	4,101
# of blocks from dmperm	439
# strongly connected comp.	31
entries not in dmperm blocks	5,319
explicit zero entries	0
nonzero pattern symmetry	2%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	J. Mallya
editor	T. Davis
date	1997
kind	chemical process simulation problem
2D/3D problem?	no

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	1,839,299	1,451,887	209,522
Cholesky flop count	2.0e+09	9.8e+08	1.9e+07
nnz(L+U), no partial pivoting	3,674,497	2,899,673	420,262
nnz(V) for QR, upper bound nnz(L) for LU	151,956	206,085	131,814
nnz(R) for QR, upper bound nnz(U) for LU	331,364	439,418	283,431

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.