Now showing items 1-2 of 2

    • 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 ...
    • The radius of starlikeness of the certain classes of p-valent functions defined by multiplier transformations 

      Acu, Mugur; Polatoğlu, Yaşar; Yavuz, Emel (Springer International Publishing, 2008-12)
      The aim of this paper is to give the radius of starlikeness of the certain classes of Open image in new window-valent functions defined by multiplier transformations. The results are obtained by using techniques of Robertson ...