A sharp bound for the Schwarzian derivative of concave functions

Volume 128 / 2012

Bappaditya Bhowmik, Karl-Joachim Wirths Colloquium Mathematicum 128 (2012), 245-251 MSC: Primary 30C45; Secondary 30C55, 30C62. DOI: 10.4064/cm128-2-10

Abstract

We derive a sharp bound for the modulus of the Schwarzian derivative of concave univalent functions with opening angle at infinity less than or equal to $\pi \alpha $, $\alpha \in [1,2].$

Authors

  • Bappaditya BhowmikDepartment of Mathematics
    National Institute of Technology
    Rourkela 769008, India
    e-mail
  • Karl-Joachim WirthsInstitut für Analysis and Algebra
    TU Braunschweig
    38106 Braunschweig, Germany
    e-mail

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