Matrix properties
number of rows	23,948
number of columns	23,948
nonzeros	202,708
structural full rank?	yes
structural rank	23,948
# of blocks from dmperm	5
# strongly connected comp.	5
explicit zero entries	8
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 23948-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	308,197
Cholesky flop count	2.1e+07
nnz(L+U), no partial pivoting, with AMD	592,446
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	24,034,892
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	34,364,025

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 8 explicit zero entries.

SVD-based statistics:
norm(A)	1.94346e+15
min(svd(A))	1e-08
cond(A)	1.94345e+23
rank(A)	9
sprank(A)-rank(A)	23,939
null space dimension	23,939
full numerical rank?	no
singular value gap	2.2948

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.