Matrix properties
number of rows	317
number of columns	317
nonzeros	5,923
structural full rank?	yes
structural rank	317
# of blocks from dmperm	82
# strongly connected comp.	82
explicit zero entries	1,404
nonzero pattern symmetry	80%
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 317-by-1
x	full 317-by-1

Notes:

next: - first: DRIVCAV/cavity01                         
pattern is the same as the transpose of DRIVCAV/cavity01

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	3,959
Cholesky flop count	7.1e+04
nnz(L+U), no partial pivoting, with AMD	7,601
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	5,800
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	15,653

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 1404 explicit zero entries.

SVD-based statistics:
norm(A)	71.2268
min(svd(A))	2.01067e-05
cond(A)	3.54245e+06
rank(A)	317
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.