Abstract
Let K be a compact set in an open set D on a Stein manifold Ω of dimension n. We denote by H ∞ D the Banach space of all bounded and analytic in D functions endowed with the uniform norm and by A K D a compact subset of the space CK consisted of all restrictions of functions from the unit ball 𝔹 H ∞ D . In 1950ies Kolmogorov posed a problem: does
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