Tyt. z nagł.References p. 16-17.Dostępny również w formie drukowanej.ABSTRACT: We consider Wiener type algebras on an open Banach ball. In particular, we prove that such algebras consist of functions analytic in this ball. We also consider a property of one-parameter groups generated by an isometric group acting on a Banach ball. We establish that the subspace of exponential type vectors of its generators form a dense subalgebra in a Wiener algebra and a generator is a derivation on this subspace. KEYWORDS: unitary one-parametric group, Wiener type algebras
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