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   sci.math.symbolic      Symbolic algebra discussion      10,432 messages   

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   Message 8,632 of 10,432   
   Axel Vogt to Peter Luschny   
   Re: The Joy of CAS   
   25 Jul 14 12:41:03   
   
   From: &noreply@axelvogt.de   
      
   On 25.07.2014 12:11, Peter Luschny wrote:   
   > sum_{i=0..n} binomial(n-i-1, n-i)   
      
   I think the reason might be   
      
   binomial(n-i-1,n-i);   
   subs(n-i=m, %); convert(%, GAMMA); subs(m=n-i, %);   
      
                                GAMMA(n - i)   
                          -------------------------   
                          GAMMA(1 + n - i) GAMMA(0)   
      
   and ignoring 1/GAMMA(0) = 0 but computing GAMMA(0).   
      
   --- SoupGate-Win32 v1.05   
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