Matrix properties
number of rows	4,704
number of columns	4,704
nonzeros	104,756
structural full rank?	yes
structural rank	4,704
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	binary
structure	symmetric
Cholesky candidate?	yes
positive definite?	no

author	R. Grimes
editor	T. Davis
date	1995
kind	duplicate structural problem
2D/3D problem?	yes

Notes:

Boeing/nasa4704 is the nonzero pattern of Nasa/nasa4704.

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	283,225
Cholesky flop count	3.7e+07
nnz(L+U), no partial pivoting, with AMD	561,746
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	671,166
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	1,320,652

SVD-based statistics:
norm(A)	27.0805
min(svd(A))	0
cond(A)	Inf
rank(A)	2,264
sprank(A)-rank(A)	2,440
null space dimension	2,440
full numerical rank?	no
singular value gap	2.33125e+11

singular values (MAT file):	click here
SVD method used:	s = piro_band_svd (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.