Ein gruppentheoretisches Kriterium für die Lösbarkeit der Funktionalgleichung f(x + y) =F(f(x),f(y))
Equivalent Expressions of Direct Sum Decomposition of Groups1
In this article, the equivalent expressions of the direct sum decomposition of groups are mainly discussed. In the first section, we formalize the fact that the internal direct sum decomposition can be defined as normal subgroups and some of their properties. In the second section, we formalize an equivalent form of internal direct sum of commutative groups. In the last section, we formalize that the external direct sum leads an internal direct sum. We referred to [19], [18] [8] and [14] in the...
Erratum “Pure extensions of locally compact abelian groups” [Rend. Sem. Mat. Univ. Padova 116 (2006), 31–40]
Essentially Rigid Floppy Subgroups of the Baer-Specker Group.
Evasion and prediction - the Specker phenomenon and Gross space.