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

Maintained by Tim Davis, last updated 01-Apr-2011.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.