Results on analytic functions defined by Laplace-Stieltjes transforms with perfect ϕ-type

Autor: Liu Simin, Xu Hongyan, Cui Yongqin, Gong Pan
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Open Mathematics, Vol 18, Iss 1, Pp 1814-1829 (2020)
Druh dokumentu: article
ISSN: 2391-5455
DOI: 10.1515/math-2020-0118
Popis: In this paper, we introduce the concept of the perfect ϕ\phi -type to describe the growth of the maximal molecule of Laplace-Stieltjes transform by using the more general function than the usual. Based on this concept, we investigate the approximation and growth of analytic functions F(s)F(s) defined by Laplace-Stieltjes transforms convergent in the half plane and obtain some results about the necessary and sufficient conditions on analytic functions F(s)F(s) defined by Laplace-Stieltjes transforms with perfect ϕ\phi -type, which are some generalizations and improvements of the previous results given by Kong [On generalized orders and types of Laplace-Stieltjes transforms analytic in the right half-plane, Acta Math. Sin. 59A (2016), 91–98], Singhal and Srivastava [On the approximation of an analytic function represented by Laplace-Stieltjes transformations, Anal. Theory and Appl. 31 (2015), 407–420].
Databáze: Directory of Open Access Journals