Matrix properties
number of rows	2,836
number of columns	2,836
nonzeros	10,965
structural full rank?	yes
structural rank	2,836
# of blocks from dmperm	869
# strongly connected comp.	1
explicit zero entries	439
nonzero pattern symmetry	0%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	S. Zitney
editor	S. Hadfield, T. Davis
date	1994
kind	chemical process simulation problem sequence
2D/3D problem?	no

Additional fields	size and type
S	sparse 2836-by-2836
A	cell 44-by-1
Zeros	cell 44-by-1

Notes:

aux.A{i}: ith matrix in sequence. aux.Zeros{i}: binary pattern of explicit
zero entries provided in original data.  aux.S = union of all patterns.   

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	530,459
Cholesky flop count	3.0e+08
nnz(L+U), no partial pivoting, with AMD	1,058,082
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	12,020
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	29,890

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 439 explicit zero entries.

SVD-based statistics:
norm(A)	741300
min(svd(A))	2.197e-07
cond(A)	3.37414e+12
rank(A)	2,835
sprank(A)-rank(A)	1
null space dimension	1
full numerical rank?	no
singular value gap	2.72674

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.