MathGroup Archive 1998

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Overriding default rules

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  • Subject: [mg13512] Overriding default rules
  • From: braynor at (Bill Raynor (B12349))
  • Date: Fri, 31 Jul 1998 04:33:27 -0400
  • Organization: Kimberly-Clark Corp.
  • Sender: owner-wri-mathgroup at

I need to work with sums and difference of terms like Sum[i^2/(a + b
i)^2, {i,0,n}]
which Mathematica immediately converts to polygamma's divided by a
function of b. 

How do I stop the conversion?
the function works just fine when b->0, but their reformulation does
not. Additionally, I want to expand and manipulate the series for small
values of n, which can't be done once its converted to PolyGamma.


| Bill Raynor                       |braynor at                O-
| | Kimberly Clark Corp               |TEL:920/721-5973                
| | 2100 Winchester Road              |FAX:920/721-2765                
| | Neenah, Wi. USA 54956             |DNRC:Minister of Standard

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