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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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        The image illustrates a limitcycle.
        
         
          
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            File:Limitcycle.svg is a vector version of this file.  It should be used in place of this raster image when superior. 
             
            File:Limitcycle.jpg     File:Limitcycle.svg  
             
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          Permission is granted to copy, distribute and/or modify this document under the terms of the  GNU Free Documentation License, Version 1.2 or any later version published by the  Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled  GNU Free Documentation License.  http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue 
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        The following pages on Schools Wikipedia link to this image (list may be incomplete):
        
        
       
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