Matrix properties
number of rows	12,546
number of columns	12,546
nonzeros	140,034
structural full rank?	yes
structural rank	12,546
# of blocks from dmperm	1
# 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	M. Arioli
editor	N. Gould, Y. Hu, J. Scott
date	2004
kind	computational fluid dynamics problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	487,299
Cholesky flop count	4.3e+07
nnz(L+U), no partial pivoting, with AMD	962,052
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	1,046,650
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	2,348,996

SVD-based statistics:
norm(A)	3.99785
min(svd(A))	7.49251e-17
cond(A)	5.3358e+16
rank(A)	12,544
sprank(A)-rank(A)	2
null space dimension	2
full numerical rank?	no
singular value gap	1.92936e+09

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.