In article <1p8cwg9spj9vh.1bekopd1ypbqa.dlg@[EMAIL PROTECTED]
>, Brian M. Scott
<b.scott@[EMAIL PROTECTED]
> wrote:
> On Tue, 15 Jul 2008 17:45:58 -0400, Paul Sperry
> <plsperry@[EMAIL PROTECTED]
> wrote in
> <news:150720081745589130%plsperry@[EMAIL PROTECTED]
> in
> alt.algebra.help:
>
> [...]
>
> > "Over" is more informal. "The sum of t(n) over [x,y]" ,
> > "the sum of t(n) for all n in [x,y]" and "sum(t(n) : n is
> > in [x,y])"
>
> I consider this last notationally incorrect: it should be
> sum{t(n) : n in [x, y]}.
It depends on how you feel about verbs I guess.
> > all say the same thing the first is most informal the
> > last, most formal. Formality is a good thing.
>
> Up to a point, which varies by context.
>
> [...]
>
> Brian
--
Paul Sperry
Columbia, SC (USA)
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