Matrix properties
number of rows	3,909
number of columns	3,909
nonzeros	91,223
structural full rank?	yes
structural rank	3,909
# of blocks from dmperm	2
# strongly connected comp.	2
entries not in dmperm blocks	408
explicit zero entries	24,134
nonzero pattern symmetry	symmetric
numeric value symmetry	73%
type	real
structure	unsymmetric
Cholesky candidate?	no
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'))	127,797	146,500	169,790
Cholesky flop count	5.7e+06	7.9e+06	9.4e+06
nnz(L+U), no partial pivoting	251,685	289,091	336,079
nnz(V) for QR, upper bound nnz(L) for LU	320,164	295,022	236,889
nnz(R) for QR, upper bound nnz(U) for LU	969,014	806,886	658,162

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 24134 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.