Matrix properties
number of rows	3,175
number of columns	3,175
nonzeros	84,723
structural full rank?	yes
structural rank	3,175
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	4,204
nonzero pattern symmetry	symmetric
numeric value symmetry	67%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	A. Garon
editor	T. Davis
date	1996
kind	computational fluid dynamics problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	184,873	180,506
Cholesky flop count	1.6e+07	1.4e+07
nnz(L+U), no partial pivoting	366,571	357,837
nnz(V) for QR, upper bound nnz(L) for LU	217,013	294,215
nnz(R) for QR, upper bound nnz(U) for LU	537,629	691,257

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 4204 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.