Matrix properties
number of rows	3,251
number of columns	3,251
nonzeros	65,875
structural full rank?	yes
structural rank	3,251
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	900
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
nnz(chol(P*(A+A'+s*I)*P'))	108,468	108,709
Cholesky flop count	6.1e+06	5.6e+06
nnz(L+U), no partial pivoting	213,685	214,167
nnz(V) for QR, upper bound nnz(L) for LU	241,684	245,897
nnz(R) for QR, upper bound nnz(U) for LU	723,046	713,605

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 900 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.