Matrix properties
number of rows	217,918
number of columns	217,918
nonzeros	11,524,432
structural full rank?	yes
structural rank	217,918
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	109,992
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
nnz(chol(P*(A+A'+s*I)*P'))	60,054,622	48,348,461
Cholesky flop count	4.7e+10	2.2e+10
nnz(L+U), no partial pivoting	119,891,326	96,479,004
nnz(V) for QR, upper bound nnz(L) for LU	111,734,682	80,402,838
nnz(R) for QR, upper bound nnz(U) for LU	219,759,224	152,349,374

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 109992 explicit zero entries.

Maintained by Tim Davis, last updated 30-Sep-2008.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.