Matrix properties
number of rows	24,993
number of columns	24,993
nonzeros	69,972
structural full rank?	no
structural rank	19,994
# of blocks from dmperm	2
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	no
positive definite?	no

author	T. Coleman, A. Liao
editor	P. Toint
date	1992
kind	optimization problem
2D/3D problem?	no

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	74,971
Cholesky flop count	2.3e+05
nnz(L+U), no partial pivoting, with AMD	124,949
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	25,024,990
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	94,958

SVD-based statistics:
norm(A)	2
min(svd(A))	1.04459e-20
cond(A)	1.91462e+20
rank(A)	19,994
sprank(A)-rank(A)	0
null space dimension	4,999
full numerical rank?	no
singular value gap	4.99398e+10

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.