Re: Summation question
- To: mathgroup at smc.vnet.net
- Subject: [mg85708] Re: [mg85664] Summation question
- From: Bob Hanlon <hanlonr at cox.net>
- Date: Tue, 19 Feb 2008 07:08:23 -0500 (EST)
- Reply-to: hanlonr at cox.net
s = Prime /@ Range[6]
{2,3,5,7,11,13}
Total[f /@ s]
f(2)+f(3)+f(5)+f(7)+f(11)+f(13)
Plus @@ f /@ s
f(2)+f(3)+f(5)+f(7)+f(11)+f(13)
Sum[f[s[[i]]], {i, 6}]
f(2)+f(3)+f(5)+f(7)+f(11)+f(13)
Bob Hanlon
---- Robert Pigeon <robert.pigeon at videotron.ca> wrote:
> Good day all,
>
> I want to make a summation like this: Sum[f[i],{i, start,
> finish}]. What I want is that the sum be over a specific set like
> {1,3,5,7,11,13}. So the sum would be : f[1]+f[3]+f[5]+f[7]+f[11]+f[13]. The
> set I want to use is the primes. So, how do I use, if possible, Sum over a
> specific set ?
>
>
>
> Thanks,
>
>
>
> Robert
>
>
>
> Robert Pigeon
>
>