%-------------------------------------------------------------------------------
% UF Sparse Matrix Collection, Tim Davis
% http://www.cise.ufl.edu/research/sparse/matrices/SNAP/cit-HepPh
% name: SNAP/cit-HepPh
% [Arxiv High Energy Physics paper citation network]
% id: 2292
% date: 2003
% author: J. Gehrke, P. Ginsparg, J. Kleinberg
% ed: J. Leskovec
% fields: name title A id date author ed kind notes aux
% aux: nodename
% kind: directed 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                                                   
%                                                                                 
% High-energy physics citation network                                            
% Dataset information                                                             
%                                                                                 
% Arxiv HEP-PH (high energy physics phenomenology ) citation graph is from the    
% e-print arXiv and covers all the citations within a dataset of 34,546 papers    
% with 421,578 edges. If a paper i cites paper j, the graph contains a directed   
% edge from i to j. If a paper cites, or is cited by, a paper outside the         
% dataset, the graph does not contain any information about this.                 
%                                                                                 
% 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 HEP-PH section.              
%                                                                                 
% The data was originally released as a part of 2003 KDD Cup.                     
%                                                                                 
% Dataset statistics                                                              
% Nodes   34546                                                                   
% Edges   421578                                                                  
% Nodes in largest WCC    34401 (0.996)                                           
% Edges in largest WCC    421485 (1.000)                                          
% Nodes in largest SCC    12711 (0.368)                                           
% Edges in largest SCC    139981 (0.332)                                          
% Average clustering coefficient  0.2962                                          
% Number of triangles     1276868                                                 
% Fraction of closed triangles    0.1457                                          
% Diameter (longest shortest path)    12                                          
% 90-percentile effective diameter    5                                           
%                                                                                 
% Source (citation)                                                               
%                                                                                 
% J. Leskovec, J. Kleinberg and C. Faloutsos. Graphs over Time: Densification     
% Laws, Shrinking Diameters and Possible Explanations. ACM SIGKDD International   
% Conference on Knowledge Discovery and Data Mining (KDD), 2005.                  
%                                                                                 
% J. Gehrke, P. Ginsparg, J. M. Kleinberg. Overview of the 2003 KDD Cup. SIGKDD   
% Explorations 5(2): 149-151, 2003.                                               
%                                                                                 
% Files                                                                           
% File    Description                                                             
% cit-HepPh.txt.gz    Paper citation network of Arxiv High Energy Physics category
% cit-HepPh-dates.txt.gz  Time of nodes (paper submission time to Arxiv)          
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