Matrix properties
number of rows	839
number of columns	839
nonzeros	22,460
structural full rank?	yes
structural rank	839
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	255
nonzero pattern symmetry	symmetric
numeric value symmetry	89%
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'))	15,011	17,714
Cholesky flop count	2.9e+05	4.5e+05
nnz(L+U), no partial pivoting	29,183	34,589
nnz(V) for QR, upper bound nnz(L) for LU	18,705	27,054
nnz(R) for QR, upper bound nnz(U) for LU	55,686	73,385

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 255 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.