Matrix properties
number of rows	41,490
number of columns	41,490
nonzeros	488,633
structural full rank?	yes
structural rank	41,490
# of blocks from dmperm	1,997
# strongly connected comp.	1,017
explicit zero entries	77,323
nonzero pattern symmetry	3%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	P. Hollinger
editor	T. Davis
date	2001
kind	economic problem
2D/3D problem?	no

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	11,427,139
Cholesky flop count	1.4e+10
nnz(L+U), no partial pivoting, with AMD	22,812,788
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	14,403,942
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	28,482,298

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 77323 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.