--- In cybalist@..., "Piotr Gasiorowski" <gpiotr@...> wrote:
> *a: and *o: did _not_ merge in Balto-Slavic. They merged in Proto-
Slavic and, independently, in _some_ Baltic dialects (Old Prussian).
Even standard Lithuanian, in which *a: > o:, keeps it different from
*o: > uo.
>
> Piotr
>
To be pedantically precise,
1. merged in some, not all, positions in Old Prussian.
2. merged in most Samogitian (^zemai~c^iu,) dialects of Lithuanian as
well (*a:, *o: > uo or even u:).
3. And of course we all know of that quirks in Proto-Slavic which
formally don't let us state they merged in a sense '*a: and *o:
reflexed equally in all equivalent positions' (cf., eg, *-a:n >
*<o,>, while *-o:n > *y2).
Sergei