%-------------------------------------------------------------------------------
% UF Sparse Matrix Collection, Tim Davis
% http://www.cise.ufl.edu/research/sparse/matrices/SNAP/ca-AstroPh
% name: SNAP/ca-AstroPh
% [Collaboration network of Arxiv Astro Physics]
% id: 2295
% date: 2003
% author: J. Leskovec, J. Kleinberg and C. Faloutsos
% ed: J. Leskovec
% fields: name title A id date author ed kind notes aux
% aux: nodename
% kind: undirected graph
%-------------------------------------------------------------------------------
% notes:
% Networks from SNAP (Stanford Network Analysis Platform) Network Data Sets,    
% Jure Leskovec http://snap.stanford.edu/data/index.html                        
% email jure at cs.stanford.edu                                                 
%                                                                               
% Astro Physics collaboration network                                           
%                                                                               
% Dataset information                                                           
%                                                                               
% Arxiv ASTRO-PH (Astro Physics) collaboration network is from the e-print arXiv
% and covers scientific collaborations between authors papers submitted to Astro
% Physics category. If an author i co-authored a paper with author j, the graph 
% contains a undirected edge from i to j. If the paper is co-authored by k      
% authors this generates a completely connected (sub)graph on k nodes.          
%                                                                               
% The data covers papers in the period from January 1993 to April 2003 (124     
% months). It begins within a few months of the inception of the arXiv, and thus
% represents essentially the complete history of its ASTRO-PH section.          
%                                                                               
% Dataset statistics                                                            
% Nodes   18772                                                                 
% Edges   396160                                                                
% Nodes in largest WCC    17903 (0.954)                                         
% Edges in largest WCC    394003 (0.995)                                        
% Nodes in largest SCC    17903 (0.954)                                         
% Edges in largest SCC    394003 (0.995)                                        
% Average clustering coefficient  0.6306                                        
% Number of triangles     1351441                                               
% Fraction of closed triangles    0.318                                         
% Diameter (longest shortest path)    14                                        
% 90-percentile effective diameter    5.1                                       
%                                                                               
% Source (citation)                                                             
%                                                                               
% J. Leskovec, J. Kleinberg and C. Faloutsos. Graph Evolution: Densification and
% Shrinking Diameters. ACM Transactions on Knowledge Discovery from Data (ACM   
% TKDD), 1(1), 2007.                                                            
%                                                                               
% Files                                                                         
% File    Description                                                           
% ca-AstroPh.txt.gz   Collaboration network of Arxiv Astro Physics category     
%-------------------------------------------------------------------------------
