Matrix properties
number of rows	4,515
number of columns	4,515
nonzeros	97,707
structural full rank?	yes
structural rank	4,515
# of blocks from dmperm	2
# strongly connected comp.	2
entries not in dmperm blocks	0
explicit zero entries	0
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	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	222,496	240,314	222,496
Cholesky flop count	1.6e+07	1.8e+07	1.6e+07
nnz(L+U), no partial pivoting	440,477	476,113	440,477
nnz(V) for QR, upper bound nnz(L) for LU	268,959	320,042	302,387
nnz(R) for QR, upper bound nnz(U) for LU	517,210	597,138	562,187

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.