Matrix properties
number of rows	52,329
number of columns	52,329
nonzeros	2,698,463
structural full rank?	yes
structural rank	52,329
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	binary
structure	symmetric
Cholesky candidate?	yes
positive definite?	no

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	10,826,976
Cholesky flop count	7.4e+09
nnz(L+U), no partial pivoting, with AMD	21,601,623
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	26,295,650
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	52,077,870

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.