Matrix properties
number of rows	10,848
number of columns	10,848
nonzeros	1,229,776
structural full rank?	yes
structural rank	10,848
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	2
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'))	1,966,443	2,135,076
Cholesky flop count	5.3e+08	5.8e+08
nnz(L+U), no partial pivoting	3,922,038	4,259,304
nnz(V) for QR, upper bound nnz(L) for LU	4,959,219	4,281,477
nnz(R) for QR, upper bound nnz(U) for LU	12,305,436	9,473,595

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 2 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.