Matrix properties
number of rows	4,562
number of columns	4,562
nonzeros	138,040
structural full rank?	yes
structural rank	4,562
# of blocks from dmperm	322
# strongly connected comp.	322
explicit zero entries	147
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: - first: DRIVCAV/cavity16        
pattern is the same as DRIVCAV/cavity16

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	173,690
Cholesky flop count	1.1e+07
nnz(L+U), no partial pivoting, with AMD	342,818
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	341,666
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	1,150,538

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 147 explicit zero entries.

SVD-based statistics:
norm(A)	30.7879
min(svd(A))	8.87165e-07
cond(A)	3.47037e+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.