Matrix properties
number of rows	2,163
number of columns	2,163
nonzeros	74,464
structural full rank?	yes
structural rank	2,163
# of blocks from dmperm	2
# strongly connected comp.	2
entries not in dmperm blocks	19,097
explicit zero entries	19,569
nonzero pattern symmetry	symmetric
numeric value symmetry	73%
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	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	104,853	109,263	95,325
Cholesky flop count	7.5e+06	7.9e+06	5.4e+06
nnz(L+U), no partial pivoting	207,543	216,363	207,584
nnz(V) for QR, upper bound nnz(L) for LU	278,224	214,436	97,960
nnz(R) for QR, upper bound nnz(U) for LU	787,860	569,710	308,658

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 19569 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.