In article <BjxAi.74067$uI2.2066482@[EMAIL PROTECTED]
>,
Bart Vandewoestyne <MyFirstName.MyLastName@[EMAIL PROTECTED]
> wrote:
> Suppose you want to write about the point with index i in a
> mathematical text. Then how do you write this?
>
> The ith point.
> The i'th point.
> The i-th point.
>
> I have seen all three forms, but it is not clear to me what form
> is the exact one and should be used. Or is this something that
> depends on the English dialect used?
>
> Is there a strict grammar rule for this?
I believe that i'th is incorrect. We use "nth" for n, although "ith"
looks funny to me. However, I believe that, as long as the context is
clear (that we're talking about the variable "i"), I think that's the
correct term. I'm pretty sure that i'th and i-th are things made-up by
people who just weren't sure what to do.
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