Matrix properties
number of rows	1,089
number of columns	1,089
nonzeros	4,144
structural full rank?	yes
structural rank	1,089
# of blocks from dmperm	164
# strongly connected comp.	1
explicit zero entries	120
nonzero pattern symmetry	1%
numeric value symmetry	0%
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

Additional fields	size and type
b	full 1089-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	93,882
Cholesky flop count	2.1e+07
nnz(L+U), no partial pivoting, with AMD	186,675
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	4,316
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	10,855

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 120 explicit zero entries.

SVD-based statistics:
norm(A)	29135.2
min(svd(A))	1.14937e-10
cond(A)	2.53489e+14
rank(A)	1,028
sprank(A)-rank(A)	61
null space dimension	61
full numerical rank?	no
singular value gap	14.0999

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.