Matrix properties
number of rows	656
number of columns	656
nonzeros	18,964
structural full rank?	yes
structural rank	656
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	180
nonzero pattern symmetry	symmetric
numeric value symmetry	94%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	A. Baggag, Y. Saad
editor	A. Baggag, Y. Saad
date	1994
kind	computational fluid dynamics problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	14,965	16,572
Cholesky flop count	4.0e+05	5.2e+05
nnz(L+U), no partial pivoting	29,274	32,488
nnz(V) for QR, upper bound nnz(L) for LU	28,262	29,372
nnz(R) for QR, upper bound nnz(U) for LU	78,247	78,889

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 180 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.