Matrix properties
number of rows	57,735
number of columns	57,735
nonzeros	275,094
structural full rank?	yes
structural rank	57,735
# of blocks from dmperm	9,133
# strongly connected comp.	1
entries not in dmperm blocks	28,203
explicit zero entries	2,680
nonzero pattern symmetry	0%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	Bayer
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'))	230,553,822	71,734,891	902,930
Cholesky flop count	3.1e+12	2.7e+11	3.8e+07
nnz(L+U), no partial pivoting	461,049,909	143,412,047	1,776,328
nnz(V) for QR, upper bound nnz(L) for LU	762,409	817,583	714,068
nnz(R) for QR, upper bound nnz(U) for LU	1,565,498	1,645,485	1,473,688

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 2680 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.