On relative chronology of the fall of jers, rise of new jat' (/e/) and close-mid /o/ in Old Russian

摘要

The paper discusses controversial problems of relative and absolute chronology of the fall of the jers and the rise of the new jat' and close-mid /o/ in South Old Russian dialects. Not only the principles of diachronic phonology but the Old Russian written records of the 12th c. corroborate the hypothesis of phonologization of the new jat' and close-mid /o/ of Galicia-Volhynia type before the complete loss of weak jers in the next syllable.