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
entries not in dmperm blocks	6,305
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: DRIVCAV/cavity23 first: DRIVCAV/cavity16
pattern is the same as DRIVCAV/cavity16       

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	173,690	181,717	348,611
Cholesky flop count	1.1e+07	1.1e+07	4.6e+07
nnz(L+U), no partial pivoting	342,818	358,872	698,965
nnz(V) for QR, upper bound nnz(L) for LU	341,666	364,919	335,536
nnz(R) for QR, upper bound nnz(U) for LU	1,150,538	1,135,605	1,032,380

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

Maintained by Tim Davis, last updated 04-May-2008.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.