Matrix properties
number of rows	47,072
number of columns	47,072
nonzeros	2,329,056
structural full rank?	yes
structural rank	47,072
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	7,842
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	S. Mayer
editor	J. Koster
date	2004
kind	structural problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	5,531,909	5,930,354
Cholesky flop count	1.3e+09	1.3e+09
nnz(L+U), no partial pivoting	11,016,746	11,813,636
nnz(V) for QR, upper bound nnz(L) for LU	13,749,949	10,866,578
nnz(R) for QR, upper bound nnz(U) for LU	28,194,078	21,538,187

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 7842 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.