Matrix properties
number of rows	9,035
number of columns	9,035
nonzeros	335,472
structural full rank?	yes
structural rank	9,035
# of blocks from dmperm	478
# strongly connected comp.	474
entries not in dmperm blocks	25,829
explicit zero entries	32
nonzero pattern symmetry	72%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	D. Graham
editor	T. Davis
date	1998
kind	computational fluid dynamics problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	602,647	667,938	1,243,483
Cholesky flop count	7.0e+07	7.8e+07	2.8e+08
nnz(L+U), no partial pivoting	1,196,259	1,326,841	2,503,760
nnz(V) for QR, upper bound nnz(L) for LU	1,689,616	1,323,598	1,253,486
nnz(R) for QR, upper bound nnz(U) for LU	5,071,066	4,027,878	3,663,202

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 32 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.