ЗМІСТ

Mykola Komarnytskyi

Banakh T., Gavrylkiv V.
Algebra in superextensions of groups, II: cancelativity and centers

Bondarenko V.M., Tertychna O.M.
On tame semigroups generated by idempotents with partial null multiplication

Dokuchaev M.A., Kirichenko V.V., Novikov B.V., Plakhotnyk M.V.
Gorenstein Latin squares

Howie J., Williams G.
The Tits alternative for generalized triangle groups of type(3,4,2)

Kosakowska J.
Lie algebras associated with quadratic forms and their applications to Ringel-Hall algebras

Zekovic B.
n-ary comodules over n-ary (co)algebras

Dokuchaev M., Kirichenko V., Paques A., Sant’Ana A.
Miguel Ferrero

Information on the conference in Ring Theory (Porto Alegre, Brazil, September, 2008)

Mathematics competition 2009