Matrix properties
number of rows	10,672
number of columns	10,672
nonzeros	228,395
structural full rank?	yes
structural rank	10,672
# of blocks from dmperm	912
# strongly connected comp.	31
explicit zero entries	4,238
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 10672-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	12,704,951
Cholesky flop count	3.9e+10
nnz(L+U), no partial pivoting, with AMD	25,399,230
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	352,322
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	853,038

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 4238 explicit zero entries.

SVD-based statistics:
norm(A)	18.9066
min(svd(A))	1.03128e-17
cond(A)	1.83332e+18
rank(A)	10,602
sprank(A)-rank(A)	70
null space dimension	70
full numerical rank?	no
singular value gap	482.701

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.