Matrix properties
number of rows	3,198
number of columns	3,198
nonzeros	56,834
structural full rank?	yes
structural rank	3,198
# of blocks from dmperm	199
# strongly connected comp.	2
explicit zero entries	100
nonzero pattern symmetry	5%
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	889,283
Cholesky flop count	4.6e+08
nnz(L+U), no partial pivoting, with AMD	1,775,368
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	82,406
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	142,600

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 100 explicit zero entries.

SVD-based statistics:
norm(A)	1195.15
min(svd(A))	8.73761e-05
cond(A)	1.36782e+07
rank(A)	3,198
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.