Ivšić's law

Ivšić's law, also Stang's law or Stang–Ivšić's law, is a Common Slavic accent law named after Stjepan Ivšić (1911) and Christian Schweigaard Stang (1957); the two linguists independently discovered the law in those years.

The law explains the origin of the Proto-Slavic neoacute accent occurring in the accent paradigm b as retractive from the following syllable.