Matrix properties
number of rows	14,270
number of columns	14,270
nonzeros	305,750
structural full rank?	yes
structural rank	14,270
# of blocks from dmperm	1,564
# strongly connected comp.	31
explicit zero entries	2,108
nonzero pattern symmetry	1%
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 14270-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	21,108,917
Cholesky flop count	8.5e+10
nnz(L+U), no partial pivoting, with AMD	42,203,564
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	650,912
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	1,338,115

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 2108 explicit zero entries.

SVD-based statistics:
norm(A)	19.9128
min(svd(A))	2.32377e-22
cond(A)	8.56917e+22
rank(A)	13,996
sprank(A)-rank(A)	274
null space dimension	274
full numerical rank?	no
singular value gap	4.86889

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.