Matrix properties
number of rows	53,370
number of columns	53,370
nonzeros	641,290
structural full rank?	yes
structural rank	53,370
# of blocks from dmperm	2,557
# strongly connected comp.	1,297
entries not in dmperm blocks	7,913
explicit zero entries	105,986
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:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	16,663,873	14,469,828	14,575,812
Cholesky flop count	2.3e+10	1.4e+10	1.4e+10
nnz(L+U), no partial pivoting	33,274,376	28,886,286	29,106,167
nnz(V) for QR, upper bound nnz(L) for LU	21,648,304	9,661,208	10,443,173
nnz(R) for QR, upper bound nnz(U) for LU	39,007,779	26,821,145	28,073,706

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 105986 explicit zero entries.

Maintained by Tim Davis, last updated 04-May-2008.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.