Matrix properties
number of rows	34,920
number of columns	34,920
nonzeros	3,896,496
structural full rank?	yes
structural rank	34,920
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	747,734
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'))	16,410,406	15,505,281
Cholesky flop count	1.2e+10	1.0e+10
nnz(L+U), no partial pivoting	32,785,892	30,975,642
nnz(V) for QR, upper bound nnz(L) for LU	20,435,201	25,271,738
nnz(R) for QR, upper bound nnz(U) for LU	47,931,029	56,503,262

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 747734 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.