Matrix properties
number of rows	16,830
number of columns	16,830
nonzeros	2,866,352
structural full rank?	yes
structural rank	16,830
# 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	A. Ramage
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	17,785,665
Cholesky flop count	2.9e+10
nnz(L+U), no partial pivoting, with AMD	35,554,500
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	21,310,586
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	47,317,399

SVD-based statistics:
norm(A)	199.574
min(svd(A))	7.3767e-111
cond(A)	2.70546e+112
rank(A)	4,562
sprank(A)-rank(A)	12,268
null space dimension	12,268
full numerical rank?	no
singular value gap	4.88564e+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.