Matrix properties
number of rows	121,728
number of columns	121,728
nonzeros	3,777,036
structural full rank?	yes
structural rank	121,728
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	4,308,998
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	C. Damhaug
editor	J. Koster
date	1999
kind	structural problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	86,552,266	61,822,953
Cholesky flop count	1.9e+11	9.0e+10
nnz(L+U), no partial pivoting	172,982,804	123,524,178
nnz(V) for QR, upper bound nnz(L) for LU	191,020,703	121,058,615
nnz(R) for QR, upper bound nnz(U) for LU	357,423,502	227,816,527

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 4308998 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.