Matrix properties
number of rows	1,050
number of columns	1,050
nonzeros	26,198
structural full rank?	yes
structural rank	1,050
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	2,958
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	R. Grimes
editor	T. Davis
date	1995
kind	structural problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	28,305	32,426
Cholesky flop count	1.0e+06	1.3e+06
nnz(L+U), no partial pivoting	55,560	63,802
nnz(V) for QR, upper bound nnz(L) for LU	61,864	58,888
nnz(R) for QR, upper bound nnz(U) for LU	123,084	117,964

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 2958 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.