Yazar "Owa, Shigeyoshi" için listeleme
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Generalized Hankel determinant for a general subclass of univalent functions
Yalçın, Sibel; Altınkaya, Şahsene; Owa, Shigeyoshi (Işık University Press, 2018)Making use of the generalized Hankel determinant, in this work, we consider a general subclass of univalent functions. Moreover, upper bounds are obtained for |a3 ? µa2 2|, where µ ? R. -
New sufficient conditions for starlike and convex functions
Nishiwaki, Junichi; Owa, Shigeyoshi (Işık University Press, 2014)Let A be the class of analytic functions f(z) in the open unit disc. Applying the subordination, some sufficient conditions for starlikeness and convexity are discussed. -
Notes on certain harmonic starlike mappings
Yavuz Duman, Emel; Owa, Shigeyoshi (Işık University Press, 2014)Complex-valued harmonic functions that are univalent and sense-preserving in the unit disk D can be written in the form f = h + ¯g, where h and g are analytic in D. We give some inequalities for normalized harmonic functions ... -
Some results on a subclass of harmonic mappings of order alpha
Varol, Dürdane; Aydoğan, Seher Melike; Owa, Shigeyoshi (Işık University Press, 2014-01)Let SH be the class of harmonic mappings defined by SH = { f = h(z) + g(z)| h(z) = z + ?? n=2 anz?, g(z) = b1z + ?? n=2 bnz?, b1 < 1 } where h(z) and g(z) are analytic. Additionally f(z) ? SH(?) ? | zh? (z) ? zg?(z) h(z) ...
