Matrix properties
number of rows	2,837
number of columns	2,837
nonzeros	10,967
structural full rank?	yes
structural rank	2,837
# of blocks from dmperm	880
# strongly connected comp.	1
explicit zero entries	440
nonzero pattern symmetry	0%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	S. Zitney
editor	T. Davis
date	1997
kind	chemical process simulation problem
2D/3D problem?	no

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	543,640
Cholesky flop count	3.1e+08
nnz(L+U), no partial pivoting, with AMD	1,084,443
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	12,021
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	29,893

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 440 explicit zero entries.

SVD-based statistics:
norm(A)	741300
min(svd(A))	2.19702e-07
cond(A)	3.37412e+12
rank(A)	2,836
sprank(A)-rank(A)	1
null space dimension	1
full numerical rank?	no
singular value gap	2.72671

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.