Matrix properties
number of rows	19,366
number of columns	19,366
nonzeros	134,208
structural full rank?	yes
structural rank	19,366
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	540
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	NASA
editor	G. Kumfert, A. Pothen
date	2003
kind	structural problem
2D/3D problem?	yes

Additional fields	size and type
coord	full 19366-by-2

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	687,941	606,412
Cholesky flop count	7.0e+07	4.4e+07
nnz(L+U), no partial pivoting	1,356,516	1,193,458
nnz(V) for QR, upper bound nnz(L) for LU	1,093,951	981,584
nnz(R) for QR, upper bound nnz(U) for LU	2,034,924	1,838,070

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 540 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.