Matrix properties
number of rows	3,083
number of columns	3,083
nonzeros	11,767
structural full rank?	yes
structural rank	3,083
# of blocks from dmperm	1,872
# strongly connected comp.	2
explicit zero entries	9,449
nonzero pattern symmetry	2%
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

Additional fields	size and type
b	full 3083-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	488,537
Cholesky flop count	2.8e+08
nnz(L+U), no partial pivoting, with AMD	973,991
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	21,459
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	48,212

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 9449 explicit zero entries.

SVD-based statistics:
norm(A)	1.20638e+09
min(svd(A))	5.3079e-12
cond(A)	2.27279e+20
rank(A)	2,692
sprank(A)-rank(A)	391
null space dimension	391
full numerical rank?	no
singular value gap	1.00347

singular values (MAT file):	click here
SVD method used:	s = svd (full (A)) ;
status:	SVD did not converge.

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.