Geodesic
Joint discrete universality of Hurwitz zeta functions
Sbornik. Mathematics, Tome 205 (2014) no. 11, pp. 1599-1619

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We obtain a joint discrete universality theorem for Hurwitz zeta functions. Here the parameters of zeta functions and the step of shifts of these functions approximating a given family of analytic functions are connected by some condition of linear independence. Nesterenko's theorem gives an example satisfying this condition. The universality theorem is applied to estimate the number of zeros of a linear combination of Hurwitz zeta functions. Bibliography: 20 titles.
Keywords: algebraic independence, Hurwitz zeta function, linear independence, limit theorem, space of analytic functions, joint universality. 
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     title = {Joint discrete universality of {Hurwitz} zeta functions},
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A. Laurinčikas. Joint discrete universality of Hurwitz zeta functions. Sbornik. Mathematics, Tome 205 (2014) no. 11, pp. 1599-1619. http://geodesic.mathdoc.fr/item/SM_2014_205_11_a2/