1960/19/2

Some properties of two-norm spaces and a characterization of reflexivity of Banach spaces

Charakterisierung von Fourierkoeffizienten mit einem Summierbarkeitsfaktorentheorem und Multiplikatoren

On some functional equations in Banach spaces

Convex sets invariant under group representations

Ergodische Funktionale und individueller ergodischer Satz

Remarks on the algebraic derivative in the Operational calculus

The form of the solution of the Cauchy Problem over a group

Projections in certain Banach spaces

On the theory of non-linear operator equations on conjugately similar spaces