This looks suspiciously like a math olympics puzzle where one first needs to deduce which values of n are possible and then go from there. Alex
_____ From: p2p-hackers-boun...@lists.zooko.com [mailto:p2p-hackers-boun...@lists.zooko.com] On Behalf Of LU Tb Sent: August 5, 2011 7:36 AM To: p2p-hackers@lists.zooko.com Subject: [p2p-hackers] a function Hi! I have a problem, anyone can help me. does exist a function F with the following property: F(F(X1,X2,......Xi-1,Xi,Xi+1,Xi+2,......,Xn),Xi)=F(X1,X2,......Xi-1,Xi,Xi+1, Xi+2,......,Xn) thank you! Tbo LU
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