Vol. 18 (2009)
Articles

The Schwarzian derivative and univalent functions theory

Timothy O. Opoola
Department of Mathematics, University of Ilorin, P. M. B. 1515,Ilorin, Nigeria.
Olubunmi A. Fadipe-Joseph
Department of Mathematics, University of Ilorin, P. M. B. 1515,Ilorin, Nigeria

Publicado 2009-01-28

Palabras clave

  • starlike function,
  • convex function,
  • univalency,
  • regular function and Schwarzian derivative.

Cómo citar

The Schwarzian derivative and univalent functions theory. (2009). Scientia, 18, 57-59. https://revistas.usm.cl/scientia/article/view/130

Resumen

Let \(f(z) = z + \sum_{n=2}^{\infty} a_n z^n\) be regular in the unit disk \(E = \{z : |z| < 1\}\). In this paper we establish a condition under which \(\text{Re}f(z)/z > 0\). We also apply our result to discuss the univalency of the function \(w = f(z)\).

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