3 citations · 5 across the 14 of their papers we have counts for
14 papers
Some classes of order α for second-order differential inequalities
Hitoshi Shiraishi, Kazuo Kuroki, Shigeyoshi Owa
For analytic functions f(z) in the open unit disk U with f(0)=f'(0)-1=0, S. S. Miller and P. T. Mocanu (Integral Transform. Spec. Funct. 19(2008)) have considered some sufficient p…
An application of Jack's lemma for the minimum point
Hitoshi Shiraishi
For the analytic function f(z), H. Shiraishi and S. Owa (Stud. Univ. Babes-Bolyai Math. 55(2010), 207-211) have shown a theorem for the minimum value of |f(z)|. In this paper, we d…
New extensions for a theorem by Mocanu
Hitoshi Shiraishi, Shigeyoshi Owa
For analytic functions f(z) in the open unit disk U with f(0)=f'(0)-1=f"(0)=0, P. T. Mocanu (Mathematica (Cluj), 42(2000)) has considered some sufficient arguments of f'(z)+zf"(z)…
Sufficient conditions for strongly Carathéodory functions
Hitoshi Shiraishi, Shigeyoshi Owa, H. M. Srivastava
Applying the subordination principle for analytic functions in the open unit disk U, I. H. Kim and N. E. Cho (Comput. Math. Appl. 59(2010), 2067-2073) considered some sufficient co…
Starlikeness problems for certain analytic functions concerned with subordinations
Hitoshi Shiraishi, Shigeyoshi Owa, Toshio Hayami +2
Let A_n be the class of functions f(z) which are analytic in the open unit disk U} with f(0)=0, f'(0)=1, f"(0)=f"'(0)=...=f^{(n)}=0 and f^{(n+1)}\neq0. Applying the results due to…
An application of Miller and Mocanu lemma
Hitoshi Shiraishi, Shigeyoshi Owa
Let H[a_0,n] be the class of functions f(z)=a_0+a_nz^n+...which are analytic in the open unit disk U}. For f(z) in H[a_0,n], S. S. Miller and P. T. Mocanu (J. Math. Anal. Appl. 65(…
Properties of certain analytic functions associated with two boundary points
Hitoshi Shiraishi, Shigeyoshi Owa
For analytic functions f(z) in the closed unit disk \bar{U}, two boundary points z_1 and z_2 such that α= (f'(z_1)+f'(z_2))/2 in f'(U) are considered. The object of the present pap…
Some sufficient problems for strongly close-to-convex of order μ
Hitoshi Shiraishi, Shigeyoshi Owa
For analytic functions f(z) in the open unit disk U with f(0)=f'(0)-1=0, a class STC(μ) is defined. The object of the present paper is to discuss some sufficient problems for f(z)…
Starlikeness of order α rerated to Mocanu functions
Hitoshi Shiraishi, Shigeyoshi Owa
For analytic functions f(z) in the open unit disk U with f(0)=f'(0)-1=0, P. T. Mocanu (Mathematica (Cluj), 11(34) (1969)) have considered Mocanu functions. The object of the presen…
Starlikeness and convexity for analytic functions concerned with Jack's lemma
Hitoshi Shiraishi, Shigeyoshi Owa
There are many results for sufficient conditions of functions f(z) which are analytic in the open unit disc U to be starlike and convex in U. The object of the present paper is to…
Some sufficient problems for certain univalent functions
Hitoshi Shiraishi, Shigeyoshi Owa
For analytic functions f(z) in the open unit disk U with f(0)=f'(0)-1=0, R. Singh and S. Singh (Coll. Math. 47(1982), 309-314) have considered some sufficient problems for f(z) to…
Coefficient estimates for Schwarz functions
Hitoshi Shiraishi, Toshio Hayami
Let be the class of functions of the form which are analytic and satisfy the condition in the open unit dis…
An extension of Nunokawa lemma and its example
Hitoshi Shiraishi, Mamoru Nunokawa
For analytic functions p(z) in the open unit disk U with p(0)=1, Nunokwa has given a result which called Nunokawa lemma (Proc. Japan Acad., Ser. A 68 (1992)). By studying Nunokawa…
Extensions of Nunokawa lemma for argument properties
Hitoshi Shiraishi
Let H[a_0,n] be the class of functions p(z)=a_0+a_nz^n+... which are analytic in the open unit disk U. For p(z)in H[1,2], M. Nunokawa, S. Owa, N. Uyanik and H. Shiraishi (Math. Com…