On Sat, Aug 29, 2009 at 9:30 PM, Minh Nguyen<nguyenmi...@gmail.com> wrote:

<SNIP>

>> And is there a function (or at least an easy algorithm that I can
>> implement myself) that for a given integer n answers the question
>> whether it is "an %d-cochain"%n or "a %d-cochain"%n ?
>
> Any number that is spelt with a vowel, e.g.
>
> an eight-cochain
> an eleven-cochain
> an eighteen-cochain
>
> and you can safely put "a" before a number whose spelling begins with
> a consonant.

And we do this: "a one" not "an one", even though "one" starts with a vowel.

-- 
Regards
Minh Van Nguyen

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