Matrix properties
number of rows	1,651
number of columns	1,651
nonzeros	49,062
structural full rank?	yes
structural rank	1,651
# of blocks from dmperm	13
# strongly connected comp.	1
entries not in dmperm blocks	710
explicit zero entries	471
nonzero pattern symmetry	symmetric
numeric value symmetry	98%
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'))	43,746	48,686	94,261
Cholesky flop count	1.5e+06	1.9e+06	6.6e+06
nnz(L+U), no partial pivoting	85,841	95,721	187,581
nnz(V) for QR, upper bound nnz(L) for LU	68,164	91,203	73,021
nnz(R) for QR, upper bound nnz(U) for LU	241,048	267,177	221,400

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 471 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.