Matrix properties
number of rows	4,562
number of columns	4,562
nonzeros	131,735
structural full rank?	yes
structural rank	4,562
# of blocks from dmperm	322
# strongly connected comp.	322
explicit zero entries	6,452
nonzero pattern symmetry	95%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	A. Chapman
editor	A. Baggag, Y. Saad
date	1996
kind	subsequent computational fluid dynamics problem
2D/3D problem?	yes

Additional fields	size and type
b	full 4562-by-1
x	full 4562-by-1

Notes:

next: DRIVCAV/cavity22 first: DRIVCAV/cavity16          
pattern is the same as the transpose of DRIVCAV/cavity16

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	153,446
Cholesky flop count	9.1e+06
nnz(L+U), no partial pivoting, with AMD	302,330
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	291,165
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	943,772

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 6452 explicit zero entries.

SVD-based statistics:
norm(A)	18.1018
min(svd(A))	1.36869e-06
cond(A)	1.32256e+07
rank(A)	4,562
sprank(A)-rank(A)	0
null space dimension	0
full numerical rank?	yes

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.