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Toplam kayıt 5, listelenen: 1-5
Applications of the Jack's lemma for the meromorphic functions
(Springernature, 2021)
In this paper, we give some results on zf'(z)/f(z) for the certain classes of f(z) meromorphic functions. For the function f(z) = 1/z + c(0) + c(1)z + c(2)z(2)+ ... defined in the punctured disc U = {z : 0
SOME RESULTS CONCERNED WITH HANKEL DETERMINANT FOR N (?) CLASS
(Korean Mathematical Soc, 2021)
In this paper, we give some results an upper bound of Hankel determinant of H2(1) for the classes of N (alpha). We get a sharp upper bound for H-2(1) = c(3)-c(2)(2) for N (alpha) by adding z(1), z(2), ... , z(n) zeros of ...
NEW ESTIMATES FOR MEROMORPHIC FUNCTIONS
(Publications L Institut Mathematique Matematicki, 2021)
A boundary version of the Schwarz lemma for meromorphic functions is investigated. For the function I-n f(z) = 1/z + Sigma(infinity)(k=2) k(n)c(k-2)z(k-2), belonging to the class of W, we estimate from below the modulus ...
ON BOUNDS FOR THE DERIVATIVE OF ANALYTIC FUNCTIONS AT THE BOUNDARY
(Kangwon-Kyungki Mathematical Soc, 2021)
In this paper, we obtain a new boundary version of the Schwarz lemma for analytic function. We give sharp upper bounds for vertical bar f'(0)vertical bar and sharp lower bounds for vertical bar f'(c)vertical bar with c is ...
Sharpened Forms for ?-Spirallike Function of Complex Order on the Boundary
(Amer Inst Physics, 2021)
We present a different version of Schwarz Lemma and estimate the angular derivative of the function zf'(z)/f(z) from below for lambda-spirallike function f(z) of complex order at the boundary of the unit disc D by taking ...