The Freiheitssatz and the automorphisms of free right-symmetric algebras
  We prove the Freiheitssatz for right-symmetric algebras and the decidability of the word problem for right-symmetric algebras with a single defining relation. We also prove that two generated subalgebras of free right-symmetric algebras are free and automorphisms of two generated free right-symmetric algebras are tame. 
Daniyar Kozybaev, Leonid Makar-Limanov, Ualbai Umirbaev