Estimates on some functionals over non-linear resolvents

Mark Elin, Fiana Jacobzon, Fiana Jacobzon


Estimation of linear and quadratic functionals over different classes of univalent functions is one of the classical problems in geometric function theory. In this paper we solve the problem over some classes of so-called non-linear resolvents, which arise as a fruitful tool in dynamic systems. Sharp estimates on early Taylor coefficients and the Fekete--Szeg\"{o} functional are established.


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