Matrix properties
number of rows	7,337
number of columns	7,337
nonzeros	154,660
structural full rank?	yes
structural rank	7,337
# of blocks from dmperm	676
# strongly connected comp.	31
explicit zero entries	1,848
nonzero pattern symmetry	2%
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 7337-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	5,655,624
Cholesky flop count	1.1e+10
nnz(L+U), no partial pivoting, with AMD	11,303,911
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	260,245
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	618,397

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 1848 explicit zero entries.

SVD-based statistics:
norm(A)	18.3146
min(svd(A))	4.1592e-21
cond(A)	4.40339e+21
rank(A)	7,315
sprank(A)-rank(A)	22
null space dimension	22
full numerical rank?	no
singular value gap	6905.46

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.