Matrix properties
number of rows	10,964
number of columns	10,964
nonzeros	231,806
structural full rank?	yes
structural rank	10,964
# of blocks from dmperm	1,200
# strongly connected comp.	31
explicit zero entries	1,935
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 10964-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	12,384,800
Cholesky flop count	3.6e+10
nnz(L+U), no partial pivoting, with AMD	24,758,636
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	411,929
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	964,310

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 1935 explicit zero entries.

SVD-based statistics:
norm(A)	19.9128
min(svd(A))	3.10405e-19
cond(A)	6.41509e+19
rank(A)	10,810
sprank(A)-rank(A)	154
null space dimension	154
full numerical rank?	no
singular value gap	5.06444

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.