Matrix properties
number of rows	35,910
number of columns	35,910
nonzeros	380,240
structural full rank?	yes
structural rank	35,910
# of blocks from dmperm	5
# strongly connected comp.	5
explicit zero entries	660
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	no
positive definite?	no

author	IBM
editor	O. Schenk
date	2006
kind	optimization problem
2D/3D problem?	no

Additional fields	size and type
b	full 35910-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	629,137
Cholesky flop count	7.3e+07
nnz(L+U), no partial pivoting, with AMD	1,222,364
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	11,617,211
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	19,148,275

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 660 explicit zero entries.

SVD-based statistics:
norm(A)	120695
min(svd(A))	1e-08
cond(A)	1.20695e+13
rank(A)	35,904
sprank(A)-rank(A)	6
null space dimension	6
full numerical rank?	no
singular value gap	829.534

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.