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MathGroup Archive 2003

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Re: Summations with Primes

  • To: mathgroup at smc.vnet.net
  • Subject: [mg39944] Re: [mg39932] Summations with Primes
  • From: Andrzej Kozlowski <akoz at mimuw.edu.pl>
  • Date: Thu, 13 Mar 2003 03:00:13 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

As long as i is not too large, effectively yes. For example, suppose 
your imin is 7 and imax is 31. Then:


Sum[f[Prime[i]],{i,PrimePi[7],PrimePi[31]}]


f[7]+f[11]+f[13]+f[17]+f[19]+f[23]+f[29]+f[31]

is essentially what you wanted.

Andrzej Kozlowski
Yokohama, Japan
http://www.mimuw.edu.pl/~akoz/
http://platon.c.u-tokyo.ac.jp/andrzej/


On Wednesday, March 12, 2003, at 04:29  pm, Anthony Felder wrote:

>
> Can you tell me if, when calculating a summation of f(i) where i goes 
> from
> imin to imax, Mathematica can be forced to only use prime values for i?
>
> Thank you for your time
>
> Anthony Felder
>
>
>
>



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