Matrix properties
number of rows	1,159
number of columns	1,159
nonzeros	11,047
structural full rank?	yes
structural rank	1,159
# of blocks from dmperm	2
# strongly connected comp.	2
entries not in dmperm blocks	0
explicit zero entries	296
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
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'))	16,689	18,526	31,345
Cholesky flop count	3.0e+05	4.1e+05	1.2e+06
nnz(L+U), no partial pivoting	32,219	35,893	61,531
nnz(V) for QR, upper bound nnz(L) for LU	20,342	28,415	22,312
nnz(R) for QR, upper bound nnz(U) for LU	44,799	61,639	48,089

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 296 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.