Matrix properties
number of rows	12,005
number of columns	12,005
nonzeros	259,577
structural full rank?	yes
structural rank	12,005
# of blocks from dmperm	607
# strongly connected comp.	607
entries not in dmperm blocks	302
explicit zero entries	302
nonzero pattern symmetry	symmetric
numeric value symmetry	43%
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'))	300,771	379,766	300,469
Cholesky flop count	1.1e+07	1.9e+07	1.1e+07
nnz(L+U), no partial pivoting	589,537	747,527	589,235
nnz(V) for QR, upper bound nnz(L) for LU	395,455	635,932	505,630
nnz(R) for QR, upper bound nnz(U) for LU	1,100,667	1,671,140	1,332,865

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 302 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.