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December 6th, 2016, 08:29 PM  #1 
Newbie Joined: Dec 2016 From: United States Posts: 1 Thanks: 0  Can you write a proof for these challenging conjectures?
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December 7th, 2016, 03:34 AM  #2 
Global Moderator Joined: Dec 2006 Posts: 17,201 Thanks: 1291 
Yes, but can you post your attempts first? Most of these problems are quite easy or closely linked to wellknown theorems for which one can easily find proofs on the internet.


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