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
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:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	60,054,622
Cholesky flop count	4.7e+10
nnz(L+U), no partial pivoting, with AMD	119,891,326
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	111,734,682
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	219,759,224

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

For a description of the statistics displayed above, click here.

Maintained by Tim Davis, last updated 12-Mar-2014.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.