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author:

Zhu, Y.-C. (Zhu, Y.-C..) [1] | Liu, M.-S. (Liu, M.-S..) [2]

Indexed by:

Scopus

Abstract:

In this paper, we consider the generalized Roper-Suffridge extension operator defined by{Mathematical expression} for z = (z1, z2, ..., zn) ∈ Ωp1, p2, ..., pn, where 0 ≤ βj ≤ 1, 0 ≤ γj ≤ 1 - βj, pj > 1, and we choose the branch of the power functions such that (frac(f (z1), z1))βj |z1 = 0 = 1 and (f′ (z1))γj |z1 = 0 = 1, j = 1, 2, ..., n,Ωp1, p2, ..., pn = {(z1, z2, ..., zn) ∈ Cn : underover(∑, j = 1, n) | zj |pj < 1} . We prove that the set Φn, β2, γ2, ..., βn, γn (S (U)) can be embedded in Loewner chains and give the answer to the problem of Liu Taishun. We also obtain that the operator Φn, β2, γ2, ..., βn, γn (f) preserves starlikeness or spirallikeness of type α on Ωp1, p2, ..., pn for some suitable constants βj, γj, where S (U) is the class of all univalent analytic functions on the unit disc U in the complex plane C with f (0) = 0 and f′ (0) = 1. © 2007 Elsevier Inc. All rights reserved.

Keyword:

Biholomorphic starlike mapping; Loewner chain; Roper-Suffridge extension operator; Spirallike of type α

Community:

  • [ 1 ] [Zhu, Y.-C.]Department of Mathematics, Fuzhou University, Fuzhou, 350002 Fujian, China
  • [ 2 ] [Liu, M.-S.]Department of Mathematics, South China Normal University, Guangzhou, 510631 Guangdong, China

Reprint 's Address:

  • [Liu, M.-S.]Department of Mathematics, South China Normal University, Guangzhou, 510631 Guangdong, China

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Source :

Journal of Mathematical Analysis and Applications

ISSN: 0022-247X

Year: 2008

Issue: 2

Volume: 337

Page: 949-961

1 . 0 4 6

JCR@2008

1 . 2 0 0

JCR@2023

JCR Journal Grade:1

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 9

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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