January 10th, 2011, 10:53 AM  #1 
Newbie Joined: Sep 2009 Posts: 28 Thanks: 0  Finding a real function
Hi, Can we find a function verifying : ? Thanks a lot 
January 10th, 2011, 11:16 AM  #2 
Newbie Joined: Dec 2010 Posts: 18 Thanks: 0  Re: Finding a real function
No, take x=y. Left hand side has to be 0, right hand side almost never will be.

January 10th, 2011, 11:24 AM  #3  
Newbie Joined: Sep 2009 Posts: 28 Thanks: 0  Re: Finding a real function Quote:
I think in this case the relation stands, isn't it ?  
January 10th, 2011, 11:38 AM  #4  
Global Moderator Joined: Nov 2006 From: UTC 5 Posts: 16,046 Thanks: 938 Math Focus: Number theory, computational mathematics, combinatorics, FOM, symbolic logic, TCS, algorithms  Re: Finding a real function Quote:
 
January 10th, 2011, 11:47 AM  #5  
Newbie Joined: Sep 2009 Posts: 28 Thanks: 0  Re: Finding a real function Quote:
 
January 10th, 2011, 01:36 PM  #6  
Global Moderator Joined: Nov 2006 From: UTC 5 Posts: 16,046 Thanks: 938 Math Focus: Number theory, computational mathematics, combinatorics, FOM, symbolic logic, TCS, algorithms  Re: Finding a real function Quote:
 

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