From: tgpedersen
Message: 44109
Date: 2006-04-04
>The problem with deriving *i > *ey, *u > *ou etc instead of the
> in three grades:
>
> originally
> 1 stressed ey, ou, e
> 2 unstressed i, u, schwa
> 3 re-stressed ey, ou, o
>
> later systematised
> (on the basis of the reflexes of *a)
> in some IE dialects as
> 1 stressed ey, eu, e
> 2 unstressed i, u, schwa
> 3 re-stressed oy, ou, o