A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Univalence and convexity properties for gaussian hypergeometric functions
Tekijät: Ponnusamy S., Vuorinen M.
Julkaisuvuosi: 2001
Journal: Rocky Mountain Journal of Mathematics
Tietokannassa oleva lehden nimi: Rocky Mountain Journal of Mathematics
Vuosikerta: 31
Numero: 1
Aloitussivu: 327
Lopetussivu: 352
Sivujen määrä: 26
ISSN: 0035-7596
Verkko-osoite: http://api.elsevier.com/content/abstract/scopus_id:0035531056
Tiivistelmä
Let A = {f : Δ → C|f(z) = z + ΣΑz}. We study sufficient/necessary conditions, in terms of the coefficients Α, for a function f ∈ A to be member of well-known subclasses of the class S of univalent functions. Examples of these subclasses include starlike, convex, close-to-convex functions. In particular, functions of the form zF (a, b; c; z) are considered, where F(a, b; c; z) is the hypergeometric function. Key words and phrases. Gaussian hypergeometric functions, univalent, convex and starlike functions.
Let A = {f : Δ → C|f(z) = z + ΣΑz}. We study sufficient/necessary conditions, in terms of the coefficients Α, for a function f ∈ A to be member of well-known subclasses of the class S of univalent functions. Examples of these subclasses include starlike, convex, close-to-convex functions. In particular, functions of the form zF (a, b; c; z) are considered, where F(a, b; c; z) is the hypergeometric function. Key words and phrases. Gaussian hypergeometric functions, univalent, convex and starlike functions.
Turun yliopiston Tutkimustietojärjestelmän portaali