Matrix properties
number of rows	36,519
number of columns	36,519
nonzeros	326,107
structural full rank?	yes
structural rank	36,519
# of blocks from dmperm	57
# strongly connected comp.	57
entries not in dmperm blocks	0
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	binary
structure	symmetric
Cholesky candidate?	yes
positive definite?	no

author	NASA
editor	G. Kumfert, A. Pothen
date	2003
kind	structural problem
2D/3D problem?	yes

Additional fields	size and type
coord	full 36519-by-3

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	1,555,833	1,382,606	1,379,004
Cholesky flop count	1.6e+08	1.1e+08	1.1e+08
nnz(L+U), no partial pivoting	3,075,147	2,728,693	2,721,489
nnz(V) for QR, upper bound nnz(L) for LU	2,667,503	2,306,419	2,278,609
nnz(R) for QR, upper bound nnz(U) for LU	5,000,519	4,342,072	4,289,181

Maintained by Tim Davis, last updated 30-Sep-2008.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.