Now showing items 1-3 of 3

    • A note on certain analytic functions 

      Nunokawa, M.; Owa, Shigeyoshi; Polatoğlu, Yaşar (International Short Joint Research Workshop, Study on Calculus Operators in Univalent Function Theory, 2007, Research Institute for Mathematical Sciences, Kyoto University (RIMS), Kyoto, Japan, 2007)
    • On some first-order differential subordination 

      Yavuz, Emel; Nunokawa, M.; Sokół, J.; Cho, N.E.; Owa, S. (2014-07)
      Let denote the class of functions f that are analytic in the unit disc and normalized by f(0) = f′(0) − 1 = 0. In this paper, we investigate the class of functions such that in . We determine conditions for α and β under ...
    • On the improvement of Mocanu's conditions 

      Nunokawa, M.; Owa, Shigeyoshi; Cho, N. E.; Sokół, J.; Yavuz Duman, Emel (Springer International Publishing, 2013-12)
      We estimate |Arg{p(z)}| for functions of the form p(z)=1+a1z+a2z2+a3z3+⋯ in the unit disc D={z:|z|<1} under several assumptions. By using Nunokawa’s lemma, we improve a few of Mocanu’s results obtained by differential ...