Matrix properties
number of rows	227,362
number of columns	227,362
nonzeros	11,288,630
structural full rank?	yes
structural rank	227,362
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	no

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

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	50,710,917
Cholesky flop count	4.7e+10
nnz(L+U), no partial pivoting, with AMD	101,194,472
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	140,879,463
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	271,743,447

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.