==Copyright problem: Concurrent relation== 
 Hello, and welcome to Wikipedia! We welcome and appreciate your contributions, such as Concurrent relation, but we regretfully cannot accept copyrighted text or images borrowed from either web sites or printed material. This article appears to be a copy from http://books.google.com/books?id=_8TyhSqHUiEC&pg;=PA502&lpg;=PA502&dq;=%22Concurrent+Relation%22&source;=bl&ots;=bmFf3fDvJh&sig;=9j30NiuiLl9iNhRaGPok1gP7qeU&hl;=en&ei;=4UxESpaaJpWcMdX7lKsC&sa;=X&oi;=book_result&ct;=result&resnum;=6, and therefore a copyright violation. The copyrighted text has been or will soon be deleted. While we appreciate contributions, we must require all contributors to understand and comply with our copyright policy. Wikipedia takes copyright violations very seriously, and persistent violators will be blocked from editing.  

 If you believe that the article is not a copyright violation, or if you have permission from the copyright holder to release the content freely under allowance license, then you should do one of the following: 

 :*If you have permission from the author leave a message explaining the details at Talk:Concurrent relation and send an email with confirmation of permission to "permissions-en (at) wikimedia (dot) org". See Wikipedia:Requesting copyright permission for instructions. 
 :*If a note on the original website states that re-use is permitted 'under the GNU Free Documentation License (GFDL), versions 1.3 or later and Creative Commons Share Alike (CC-BY-SA), versions 3.0 or later, under CC-BY-SA, versions 3.0 or later, or that the material is released into the public domain leave a note at Talk:Concurrent relation with a link to where we can find that note.  
 :*If you own the copyright to the material: send an e-mail from an address associated with the original publication to permissions-en(at)wikimedia(dot)org or a postal message to the Wikimedia Foundation permitting re-use under the GFDL and CC-BY-SA'', and note that you have done so on Talk:Concurrent relation. See Wikipedia:Donating copyrighted materials for instructions.''' 
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