Matrix properties
number of rows	1,601
number of columns	1,601
nonzeros	31,849
structural full rank?	yes
structural rank	1,601
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	450
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
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'))	42,381	45,738
Cholesky flop count	1.6e+06	1.8e+06
nnz(L+U), no partial pivoting	83,161	89,875
nnz(V) for QR, upper bound nnz(L) for LU	81,117	94,377
nnz(R) for QR, upper bound nnz(U) for LU	249,139	266,011

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 450 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.