Matrix properties
number of rows	13,935
number of columns	13,935
nonzeros	63,307
structural full rank?	yes
structural rank	13,935
# of blocks from dmperm	2,226
# strongly connected comp.	1
explicit zero entries	372
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

Additional fields	size and type
b	full 13935-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	12,891,970
Cholesky flop count	4.0e+10
nnz(L+U), no partial pivoting, with AMD	25,770,005
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	161,526
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	323,903

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 372 explicit zero entries.

SVD-based statistics:
norm(A)	126000
min(svd(A))	2.48692e-14
cond(A)	5.0665e+18
rank(A)	12,610
sprank(A)-rank(A)	1,325
null space dimension	1,325
full numerical rank?	no
singular value gap	1.04778

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.