Matrix properties
number of rows	54,870
number of columns	54,870
nonzeros	2,677,324
structural full rank?	yes
structural rank	54,870
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	NASA
editor	G. Kumfert, A. Pothen
date	1995
kind	structural problem
2D/3D problem?	yes

Additional fields	size and type
b	full 54870-by-1

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	11,953,582	10,469,549
Cholesky flop count	4.8e+09	3.5e+09
nnz(L+U), no partial pivoting	23,852,294	20,884,228
nnz(V) for QR, upper bound nnz(L) for LU	25,076,207	17,381,335
nnz(R) for QR, upper bound nnz(U) for LU	48,490,189	32,771,357

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.