Matrix properties
number of rows	4,101
number of columns	4,101
nonzeros	82,682
structural full rank?	yes
structural rank	4,101
# of blocks from dmperm	439
# strongly connected comp.	31
explicit zero entries	0
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	1997
kind	chemical process simulation problem
2D/3D problem?	no

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	1,839,299
Cholesky flop count	2.0e+09
nnz(L+U), no partial pivoting, with AMD	3,674,497
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	151,956
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	331,364

SVD-based statistics:
norm(A)	13.4148
min(svd(A))	3.52648e-12
cond(A)	3.80402e+12
rank(A)	4,100
sprank(A)-rank(A)	1
null space dimension	1
full numerical rank?	no
singular value gap	211.301

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.