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On a new approach to the problem of the zero distribution of Hermite-Padé polynomials for a Nikishin system (1805.07577v1)

Published 19 May 2018 in math.CV

Abstract: A new approach to the problem of the zero distribution of Hermite-Pad\'e polynomials of type I for a pair of functions $f_1,f_2$ forming a Nikishin system is discussed. Unlike the traditional vector approach, we give an answer in terms of a scalar equilibrium problem with harmonic external field, which is posed on a two-sheeted Riemann surface.

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