Matrix properties
number of rows	6,927
number of columns	6,927
nonzeros	16,944
structural full rank?	no
structural rank	938
# of blocks from dmperm	42
# strongly connected comp.	1,394
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	binary
structure	symmetric
Cholesky candidate?	no
positive definite?	no

author	J. Grossman, P. Iain, R. Castro
editor	V. Batagelj
date	2006
kind	undirected graph
2D/3D problem?	no

Additional fields	size and type
nodename	full 6927-by-45

Notes:

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Pajek network converted to sparse adjacency matrix for inclusion in UF sparse 
matrix collection, Tim Davis.  For Pajek datasets, See V. Batagelj & A. Mrvar,
http://vlado.fmf.uni-lj.si/pub/networks/data/.                                
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 Erdos collaboration network:                                                 
 Erdos included, version 2002                                                 

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	33,211	48,213
Cholesky flop count	1.9e+06	4.8e+06
nnz(L+U), no partial pivoting	59,495	89,499
nnz(V) for QR, upper bound nnz(L) for LU	2,488,463	2,888,207
nnz(R) for QR, upper bound nnz(U) for LU	555,374	632,050

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.