Matrix properties
number of rows	17,546
number of columns	17,546
nonzeros	121,550
structural full rank?	yes
structural rank	17,546
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	388
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 17546-by-2

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	572,607	516,974
Cholesky flop count	5.2e+07	3.4e+07
nnz(L+U), no partial pivoting	1,127,668	1,016,402
nnz(V) for QR, upper bound nnz(L) for LU	904,977	836,132
nnz(R) for QR, upper bound nnz(U) for LU	1,686,085	1,569,675

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 388 explicit zero entries.

Maintained by Tim Davis, last updated 30-Sep-2008.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.