Matrix properties
number of rows	1,409
number of columns	1,409
nonzeros	42,760
structural full rank?	yes
structural rank	1,409
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	943
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'))	39,444	43,687
Cholesky flop count	1.4e+06	1.8e+06
nnz(L+U), no partial pivoting	77,479	85,965
nnz(V) for QR, upper bound nnz(L) for LU	55,879	86,062
nnz(R) for QR, upper bound nnz(U) for LU	186,988	249,136

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 943 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.