Ein gruppentheoretisches Kriterium für die Lösbarkeit der Funktionalgleichung f(x + y) =F(f(x),f(y))
Endomorphism algebras over large domains
The paper deals with realizations of R-algebras A as endomorphism algebras End G ≅ A of suitable R-modules G over a commutative ring R. We are mainly interested in the case of R having "many prime ideals", such as R = ℝ[x], the ring of real polynomials, or R a non-discrete valuation domain
Endomorphisms and product bases of the Baer-Specker group.
Every Cotorsion-free Algebra is an Endomorphism Algebra.