On Normal Subgroups of p-Solvable Groups.
On normal verbal embeddings of some classes of groups.
On n-Sum Groups.
On Nuclei Of n-Ary Quasigroups
On nuclei of n-ary quasigroups.
On nuclei of regular groupoids with division
On numbers with a unique representation by a binary quadratic form
On numerical semigroups.
On observable subgroups of complex analytic groups and algebraic structures on analytic homogeneous spaces.
On one class of quasigroups
On one definition of grammatical categories
On One-Relator Groups which Satisfy Poincaré Duality.
On one-relator soluble groups.
On optimal factorization of free semigroups into free subsemigroups.
On orbits of automorphism groups.
On order and betweenness compatibility.
On ordered left groups.
On ordered regular semigroups with biggest inverses.
On ordering the groups with nilpotent commutant.
On orthogonally -complete lattice ordered groups
In this paper we prove a theorem of Cantor-Bernstein type for orthogonally -complete lattice ordered groups.