Matrix properties
number of rows	13,436
number of columns	13,436
nonzeros	71,594
structural full rank?	yes
structural rank	13,436
# of blocks from dmperm	2,545
# strongly connected comp.	1
explicit zero entries	23,332
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 13436-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	12,726,035
Cholesky flop count	4.0e+10
nnz(L+U), no partial pivoting, with AMD	25,438,634
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	170,063
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	385,588

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 23332 explicit zero entries.

SVD-based statistics:
norm(A)	14118.9
min(svd(A))	4.46682e-10
cond(A)	3.16084e+13
rank(A)	13,360
sprank(A)-rank(A)	76
null space dimension	76
full numerical rank?	no
singular value gap	1.11094

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.