Matrix properties
number of rows	2,954
number of columns	2,954
nonzeros	36,875
structural full rank?	yes
structural rank	2,954
# of blocks from dmperm	596
# strongly connected comp.	42
explicit zero entries	331
nonzero pattern symmetry	1%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	J. Mallya
editor	T. Davis
date	1994
kind	chemical process simulation problem
2D/3D problem?	no

Additional fields	size and type
b	full 2954-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	542,379
Cholesky flop count	2.2e+08
nnz(L+U), no partial pivoting, with AMD	1,081,804
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	68,457
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	154,847

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 331 explicit zero entries.

SVD-based statistics:
norm(A)	5.97066
min(svd(A))	6.12571e-06
cond(A)	974689
rank(A)	2,954
sprank(A)-rank(A)	0
null space dimension	0
full numerical rank?	yes

singular values (MAT file):	click here
SVD method used:	s = svd (full (A)) ;
status:	ok

For a description of the statistics displayed above, click here.

Maintained by Tim Davis, last updated 12-Mar-2014.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.