Matrix properties
number of rows	1,477
number of columns	1,477
nonzeros	18,427
structural full rank?	yes
structural rank	1,477
# of blocks from dmperm	298
# strongly connected comp.	21
explicit zero entries	165
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 1477-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	224,006
Cholesky flop count	8.0e+07
nnz(L+U), no partial pivoting, with AMD	446,535
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	34,018
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	76,074

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 165 explicit zero entries.

SVD-based statistics:
norm(A)	5.97066
min(svd(A))	7.16939e-06
cond(A)	832799
rank(A)	1,477
sprank(A)-rank(A)	0
null space dimension	0
full numerical rank?	yes

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.