Matrix properties
number of rows	29,736
number of columns	29,736
nonzeros	4,444,880
structural full rank?	yes
structural rank	29,736
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	25,168
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'))	28,383,936	24,323,249
Cholesky flop count	5.0e+10	3.6e+10
nnz(L+U), no partial pivoting	56,738,136	48,616,762
nnz(V) for QR, upper bound nnz(L) for LU	71,556,047	43,799,721
nnz(R) for QR, upper bound nnz(U) for LU	146,878,900	92,545,766

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 25168 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.