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Re: Summation limits

• To: mathgroup at smc.vnet.net
• Subject: [mg46675] Re: Summation limits
• From: tinkham at ucalgary.ca (tinkham)
• Date: Fri, 27 Feb 2004 19:32:04 -0500 (EST)
• References: <c1lu5g$nse$1@smc.vnet.net> <c1mtnt$jjg$1@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

Paul Abbott <paul at physics.uwa.edu.au> wrote in message 
> In article <>, tinkham at ucalgary.ca (tinkham) 
> wrote:
 
> > I realize that I can just wrap the expression being summed in an
> > If[i!=p, ...], but it would be nice if I could just put this test in
> > the lower limit.
> 
> There is a way to do this: use the Notation package to define your own 
> input notation that accepts a lower limit of the form, say i != 1 = p. 
> See
> 
>    http://physics.uwa.edu.au/pub/Mathematica/MathGroup/TestSumIterator.nb

Thanks Paul, the Utilities`Notation` package worked beautifully for that.
Doug

> Cheers,
> Paul