Matrix properties
number of rows	35,152
number of columns	35,152
nonzeros	746,972
structural full rank?	yes
structural rank	35,152
# of blocks from dmperm	7,985
# strongly connected comp.	61
explicit zero entries	17,042
nonzero pattern symmetry	0%
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 35152-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	72,406,448
Cholesky flop count	3.8e+11
nnz(L+U), no partial pivoting, with AMD	144,777,744
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	1,523,434
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	3,411,710

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 17042 explicit zero entries.

SVD-based statistics:
norm(A)	19.9128
min(svd(A))	1.18634e-24
cond(A)	1.6785e+25
rank(A)	34,366
sprank(A)-rank(A)	786
null space dimension	786
full numerical rank?	no
singular value gap	16.5532

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.