Subclasses of Universal Taylor Series and center independence

A holomorphic function f on a simply connected domain $Ω$ belongs to a subclass of universal Taylor series if prescribed and infinite number of partial sums of the Taylor expansion of f around a given center $ζ_0$ realize Mergalyan-type approximations outside $Ω$. We will prove that this class is independent of the choice of center if the indices of the partial sums do not grow very fast to infinity.

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