Matrix properties
number of rows	1,182
number of columns	1,182
nonzeros	29,675
structural full rank?	yes
structural rank	1,182
# of blocks from dmperm	162
# strongly connected comp.	162
explicit zero entries	3,072
nonzero pattern symmetry	90%
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 1182-by-1
x	full 1182-by-1

Notes:

next: DRIVCAV/cavity09 first: DRIVCAV/cavity05          
pattern is the same as the transpose of DRIVCAV/cavity05

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	25,749
Cholesky flop count	8.2e+05
nnz(L+U), no partial pivoting, with AMD	50,316
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	37,679
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	121,612

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 3072 explicit zero entries.

SVD-based statistics:
norm(A)	35.3429
min(svd(A))	1.07606e-05
cond(A)	3.28449e+06
rank(A)	1,182
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.