Matrix properties
number of rows	7,320
number of columns	7,320
nonzeros	324,772
structural full rank?	yes
structural rank	7,320
# of blocks from dmperm	2
# strongly connected comp.	2
entries not in dmperm blocks	12
explicit zero entries	12
nonzero pattern symmetry	64%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	R. Goodwin
editor	T. Davis
date	1995
kind	computational fluid dynamics problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	597,520	533,550	1,031,278
Cholesky flop count	7.7e+07	5.1e+07	1.8e+08
nnz(L+U), no partial pivoting	1,187,720	1,059,780	2,055,248
nnz(V) for QR, upper bound nnz(L) for LU	1,416,264	961,369	831,484
nnz(R) for QR, upper bound nnz(U) for LU	4,678,957	2,652,216	2,436,325

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 12 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.