Matrix properties
number of rows	848
number of columns	848
nonzeros	24,369
structural full rank?	yes
structural rank	848
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	243
nonzero pattern symmetry	symmetric
numeric value symmetry	98%
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'))	20,289	22,967
Cholesky flop count	6.0e+05	8.2e+05
nnz(L+U), no partial pivoting	39,730	45,086
nnz(V) for QR, upper bound nnz(L) for LU	32,364	37,501
nnz(R) for QR, upper bound nnz(U) for LU	103,284	105,160

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 243 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.