Matrix properties
number of rows	974
number of columns	974
nonzeros	37,652
structural full rank?	yes
structural rank	974
# of blocks from dmperm	2
# strongly connected comp.	1
entries not in dmperm blocks	408
explicit zero entries	3,130
nonzero pattern symmetry	symmetric
numeric value symmetry	53%
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'))	33,167	38,422	66,061
Cholesky flop count	1.4e+06	2.1e+06	5.5e+06
nnz(L+U), no partial pivoting	65,360	75,870	131,556
nnz(V) for QR, upper bound nnz(L) for LU	43,529	60,334	52,241
nnz(R) for QR, upper bound nnz(U) for LU	132,548	160,512	130,799

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 3130 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.