Matrix properties
number of rows	13,535
number of columns	13,535
nonzeros	373,235
structural full rank?	yes
structural rank	13,535
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	17,372
nonzero pattern symmetry	symmetric
numeric value symmetry	67%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	A. Garon
editor	T. Davis
date	1996
kind	computational fluid dynamics problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	1,190,950
Cholesky flop count	1.9e+08
nnz(L+U), no partial pivoting, with AMD	2,368,365
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	1,724,168
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	4,336,887

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 17372 explicit zero entries.

SVD-based statistics:
norm(A)	44.8683
min(svd(A))	7.32474e-07
cond(A)	6.12558e+07
rank(A)	13,535
sprank(A)-rank(A)	0
null space dimension	0
full numerical rank?	yes

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.