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            This is a file from the  Wikimedia Commons. Information from its  description page there is shown below.  Commons is a freely licensed media file repository.  You can help. 
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           | Description | 
           
             English: A Venn diagram with n = 4. I wrote a program to draw these:  User:Kopophex/venn.ml 
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           | Date | 
           7 January 2008 | 
          
          
           | Source | 
           Transferred from  en:wikipedia; Transfer was stated to be made by  Roomsixhu. | 
          
          
           | Author | 
           Original uploader was  Kopophex at  en:wikipedia | 
          
          
           Permission ( Reusing this file) | 
           
             Released into the public domain by the author. 
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✓ The source code of this  SVG is  valid.
        
         
          
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           This  vector image was created with a  text editor. Some skill had been used to simplify the drawing. | 
          
         
         
        Previous version was 218 823 bytes -g- now 0.29% of previous size
        
         
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          This is a  retouched picture, which means that it has been digitally altered from its original version. Modifications: remove dead code, use geometric shapes, use slight fill-opacity. 
              
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         Licensing 
        
         
          | Public domainPublic domainfalsefalse | 
         
        
        
         
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          This work has been released into the  public domain by its author,  Kopophex at the  wikipedia project. This applies worldwide.
 In case this is not legally possible:  Kopophex grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law. 
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       File usage
       
        The following pages on Schools Wikipedia link to this image (list may be incomplete):
        
        
       
       This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified file.
        
       
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