Matrix properties
number of rows	50,000
number of columns	50,000
nonzeros	349,968
structural full rank?	yes
structural rank	50,000
# of blocks from dmperm	6
# strongly connected comp.	6
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	no
positive definite?	no

author	N. Gould
editor	N. Gould
date	1995
kind	optimization problem
2D/3D problem?	no

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	4,241,463
Cholesky flop count	3.4e+09
nnz(L+U), no partial pivoting, with AMD	8,432,926
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	4,271,389
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	7,821,888

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.