Matrix properties
number of rows	4,134
number of columns	4,134
nonzeros	94,408
structural full rank?	yes
structural rank	4,134
# of blocks from dmperm	199
# strongly connected comp.	2
explicit zero entries	0
nonzero pattern symmetry	6%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	S. Zitney
editor	T. Davis
date	1992
kind	chemical process simulation problem
2D/3D problem?	no

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	1,306,165
Cholesky flop count	7.3e+08
nnz(L+U), no partial pivoting, with AMD	2,608,196
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	139,334
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	248,056

SVD-based statistics:
norm(A)	1535.27
min(svd(A))	8.84543e-05
cond(A)	1.73566e+07
rank(A)	4,134
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.