Matrix properties
number of rows	2,910
number of columns	2,910
nonzeros	174,296
structural full rank?	yes
structural rank	2,910
# 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/nasa2910 is the nonzero pattern of Nasa/nasa2910.

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	202,288
Cholesky flop count	2.1e+07
nnz(L+U), no partial pivoting, with AMD	401,666
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	401,991
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	1,098,730

SVD-based statistics:
norm(A)	77.6164
min(svd(A))	8.14691e-64
cond(A)	9.5271e+64
rank(A)	1,623
sprank(A)-rank(A)	1,287
null space dimension	1,287
full numerical rank?	no
singular value gap	2.43795e+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.