[Avodah] Acharaei Rabbim l'Hatos

[Eli Turkel]

<<I am searching for the earliest and most authoritative sources that
advance this principle. IIRC there is a Rosh on this. Any more sources
from Shas and Posqim that establish this principle even outside BD?>>

I believe there is a long Maharatz Chajes that strongly disagrees and says that
rov does not apply outside of bet din. i.e. we dont pasken by taking a majority
of shitot (which shitot would be included?)

-- 
Eli Turkel