Matrix properties
number of rows	13,535
number of columns	13,535
nonzeros	373,235
structural full rank?	yes
structural rank	13,535
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	17,372
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'))	1,190,950	1,044,196
Cholesky flop count	1.9e+08	1.4e+08
nnz(L+U), no partial pivoting	2,368,365	2,074,857
nnz(V) for QR, upper bound nnz(L) for LU	1,724,168	1,847,053
nnz(R) for QR, upper bound nnz(U) for LU	4,336,887	4,516,698

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 17372 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.